DOCSLIB.ORG

Anomalies in Male Receptacles of Plagiochasma Appendiculatum Lehm

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Anomalies in Male Receptacles of Plagiochasma Appendiculatum Lehm American International Journal of Available online at http://www.iasir.net Research in Formal, Applied & Natural Sciences ISSN (Print): 2328-3777, ISSN (Online): 2328-3785, ISSN (CD-ROM): 2328-3793 AIJRFANS is a refereed, indexed, peer-reviewed, multidisciplinary and open access journal published by International Association of Scientific Innovation and Research (IASIR), USA (An Association Unifying the Sciences, Engineering, and Applied Research) Anomalies in male receptacles of Plagiochasma appendiculatum Lehm. & Lindenb Pallvi Sharma and Anima Langer Department of Botany, University of Jammu, Jammu, Jammu and Kashmir-180006, INDIA Abstract: Plagiochasma appendiculatum Lehm. & Lindenb. belongs to the family Aytoniaceae which includes five genera (Plagiochasma, Reboulia, Asterella, Mannia and Cryptomitrium). Most of these genera show abnormalities in the development of reproductive structures. In the present paper, anomalies in the morphology and anatomy of male receptacles are reported in P.appendiculatum. Keywords: Plagiochasma appendiculatum; Aytoniaceae; Anomalies; Male receptacles I. Introduction Plagiochasma appendiculatum is a thalloid hepatic which is dorso-ventrally flattened. The male receptacles are normally horse-shoe shaped, sessile and present on the dorsal surface of the thallus, while the female ones are stalked, variously lobed (usually 3-5 lobed) and present on the main thallus too. Abnormality in their behaviour has been observed by bryologists like Kashyap and Bapna [1,4]. A second forking in the two lobes of androecium of P.appendiculatum is one of the important discovery (Kashyap, 1919). Abnormal female receptacles in the same genus were studied by Bapna and Bhagat [1,2] . Anomalies in the reproductive structures have also been studied in other members of family Aytoniaceae like unusual female receptacles in Asterella blumeana nees and Asterella khasiana [5] and abnormal male receptacles in Reboulia hemispherica [6]. A number of populations have been studied in the Sunderbani area of Rajouri district, J&K over different habitats, but, only a single population collected from the non-epilithic (soil- substratum) habitat showed abnormality. II. Material and methods A total of four sites were visited, but, abnormal male receptacles were observed only at site II, situated at a distance of 9-10 km west of the main city at an altitude of 549m (Fig 1a). AIJRFANS 17-402; © 2017, AIJRFANS All Rights Reserved Page 5 Pallvi Sharma. et al., American International Journal of Research in Formal, Applied & Natural Sciences, 20(1), September-November 2017, pp. 05-06 P.appendiculatum along with other genera (Asterella sp., Reboulia sp. and Mannia sp.) grows luxuriantly on moist and shady soil along roadside. On one side of road, there are cultivation fields and human settlements. The taxon has been reported in association with pteridophytes like Adiantum capillus-veneris L. and A.caudatum Klotzsch and angiosperms like Cyanodon dactylon (L.) Pers., Sonchus arvensis L., Geranium wallichiana Oliv., Cannabis sativa L., Boerhaavia diffusa L. nom. cons., Oxalis corniculata L. (Fig 1b). Among crops, Triticum aestivum L., Zea mays L. and Brassica campestris Linn. are usually grown in the study area. A few timber plants such as Dalbergia sissoo Roxb., Pinus roxburghii Sarg. and Morus alba L. are among the wild tree species. Fortnightly collections were made from November 2012- December 2013 to obtain data on various ecological parameters like temperature, relative humidity, soil pH viz-a-viz different developmental stages of hepatic taxa, pH of the soil was estimated using pH meter [3]. The populations in their natural habitats were photographed with a digital camera and information regarding date of collection, habitat, plant colour and plant associations was noted in field note book. Other morphological and anatomical details were made with the help of compound microscope in the laboratory. III. Results and discussion During field study, one population taken from non-epilithic (soil) surface at site II, showed abnormality in the male reproductive structures in some thalli (Figs 1c and 1d). The antheridiophores showed fusion and contained antheridia in a long row in different chambers (Figs 1e and 1f). Usually the male receptacle is cordate (heart shaped) or horse- shoe shaped with one or two lobes, but, during the current study, three to four lobes in fusion were recorded. Kashyap observed second forking in the two lobes of androecium or the dichotomy of the androecium. He also observed irregularly lobed androecium. The additional lobing occurs in some robust plants growing in shady and moist place. Their androecium grows as a cushion like structure for some time along the mid dorsal line and then divides into two lobes, each of which again shows forking (i.e., double dichotomy) [4]. Temperature, pH, relative humidity and other phenological patterns did not show any significant role in the abnormality as no significant difference in these factors has been observed between sites with normal thalli and site with abnormal thalli. IV. References [1]. K.R. Bapna “On the occurrence of an abnormal female receptacle in Plagiochasma appendiculatum Lehm.& Lindenb.” The Bryologist, vol. 74, 1971, pp. 495-497. [2]. M. Bhagat and A. Langer “Anomalies in female receptacle of Plagiochasma appendiculatum Lehm. & Lindenb.- A report from J&K” Archive for bryology, vol. 193, 2013, pp.1-5. [3]. S. R. Gleissman “Field and laboratory investigation in agro ecology”. Lewis Pub., 2000. New York. [4]. S. R. Kashyap “The androecium in Plagiochasma appendiculatum L.et L and P. articulatum Kashyap” New Phytologist, vol. 18, 1919, pp. 235-238. [5]. S.K. Pandé, K. P. Srivastava and S.A. Khan “On some anomalous female receptacles of Asterella khasiana” The Bryologist, vol. 56 issue 4, 1953, pp. 229-241. [6]. A.W. Dupler “The male receptacle and antheridium of Reboulia hemisphaerica”American Journal of Botany, vol. 9 issue 6, 1922, pp. 285-295. AIJRFANS 17-402; © 2017, AIJRFANS All Rights Reserved Page 6 .
Load more

Recommended publications
  • Studies in the Marchantiales (Hepaticae) from Southern Africa. 6
    Bothalia 24,2: 133-147 ( 1994) Studies in the Marchantiales (Hepaticae) from southern Africa. 6. The genus Asterella (Aytoniaceae: Reboulioideae) and its four local species S.M. PEROLD* Keywords: Asterella, A. bachmannii, A. marginata, A. muscicola, A. wilmsii, Aytoniaceae, Hepaticae, Marchantiales, Phragmoblepharis, Reboulioideae, section Saccatae, southern Africa ABSTRACT A taxonomic account of the genus Asterella, and four local representatives, A. muscicola, A. bachmannii, A. marginata and A. wilmsii, subgenus Phragmoblepharis, is given here. A key to the species is provided. Two specimens identified by Arnell ( ll)63) as Reboulia hemisphaerica, Collins 775 and Eyles CH 1175, are actually A. wilmsii', the presence of the genus Reboulia in southern Africa is therefore not confirmed and should be deleted from the annotated checklist by Magill & Schelpe (1979) and Plants of southern Africa: names and distribution (Arnold & De Wet 1993). UITTREKSEL n Taksonomiese verslag oor die genus Asterella, en vier van die plaaslike verteenwoordigers daarvan, A. muscicola, A. bachmannii, A. marginata cn A. wilmsii, subgenus Phragmoblepharis, word hier gegee. 'n Sleutel tot die spesies word verskaf. Twee eksemplare, Collins 775 en Eyles CH 1175, wat deur Amell (1963) as Reboulia hemisphaerica geidentifiseer is, is in werklikheid A. wilmsii', die teenwoordigheid van die genus Reboulia in Suider-Alrika is dus nie bevestig nie en dit behoort geskrap te word van die geannoteerde kontrolelys deur Magill & Schelpe (1979) en van Plants o f southern Africa: names and distribution (Arnold & EX* Wet 1993). Asterella P. Beaux, in Dictionnaire des sciences Dorsal epidermis hyaline, unistratose, cells mostly naturelles 3: 257 (1805); A. Evans: 247 (1920); Frye & thin-walled, lacking trigones, occasionally with a single L.
    [Show full text]
  • Revision of the Russian Marchantiales. Ii. a Review of the Genus Asterella P
    Arctoa (2015) 24: 294-313 doi: 10.15298/arctoa.24.26 REVISION OF THE RUSSIAN MARCHANTIALES. II. A REVIEW OF THE GENUS ASTERELLA P. BEAUV. (AYTONIACEAE, HEPATICAE) РЕВИЗИЯ ПОРЯДКА MARCHANTIALES В РОССИИ. II. OБЗОР РОДА ASTERELLA P. BEAUV. (AYTONIACEAE, HEPATICAE) EUGENY A. BOROVICHEV1,2, VADIM A. BAKALIN3,4 & ANNA A. VILNET2 ЕВГЕНИЙ А. БОРОВИЧЕВ1,2, ВАДИМ А. БАКАЛИН3,4, АННА А. ВИЛЬНЕТ2 Abstract The genus Asterella P. Beauv. includes four species in Russia: A. leptophylla and A. cruciata are restricted to the southern flank of the Russian Far East and two others, A. saccata and A. lindenbergiana occur mostly in the subartcic zone of Asia and the northern part of European Russia. Asterella cruciata is recorded for the first time in Russia. The study of the ribosomal LSU (or 26S) gene and trnL-F cpDNA intron confirmed the placement of Asterella gracilis in the genus Mannia and revealed the close relationship of A. leptophylla and A. cruciata, and the rather unrelated position of A. saccata and A. lindenbergiana. The phylogenetic tree includes robustly supported terminal clades, however with only weak support for deeper nodes. In general, Asterella species and M. gracilis from Russia show low levels of infraspecific variation. An identification key and species descriptions based on Russian specimens are provided, along with details of specimens examined, ecology and diagnostic characters of species. Резюме Род Asterella P. Beauv. представлен в России четырьмя видами: A. leptophylla и A. cruciata ограничены в распространении югом российского Дальнего Востока, а два других вида, A. saccata и A. lindenbergiana, распространены преимущественно в субарктической Азии и северной части европейской России.
    [Show full text]
  • The Genus Plagiochasma (Aytoniaceae, Marchantiopsida) in Thailand
    Cryptogamie, Bryologie, 2014, 35 (2): 127-132 © 2014 Adac. Tous droits réservés The genus Plagiochasma (Aytoniaceae, Marchantiopsida) in Thailand Sahut CHANTANAORRAPINT* & Kitichate SRIDITH Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112 Thailand Abstract – The genus Plagiochasma Lehm. et Lindenb. in Thailand is reviewed, based on herbarium specimens and especially on recently collections. The genus is reported for the first time from Thailand. Two species are recognized, namely P. appendiculatum Lehm. et Lindenb. and P. cordatum Lehm. et Lindenb. Descriptions, illustrations, and a key to species are provided. Aytoniaceae / complex thalloid liverworts / Marchantiopsida / Plagiochasma / Thailand INTRODUCTION Thailand is well-known as one of the richest areas in term of biodiversity. This area is located in both the Indo-Burmese and Sundaland hotspots (Myers et al., 2000), and includes areas identified as the overlapping zone of the Sino- Himalayan and Malesian floristic regions (Smitinand, 1989). The first report for liverworts in Thailand was made by Stephani (1902) who recorded seventeen species of liverworts from Koh Chang (Island), including four new species. During 1901-1904, Hosseus collected plant specimens from the northern part of the country, and reported five liverworts (Hosseus, 1911). Later, many contributions of Thai liverworts were received. In 2008, Lai et al. published an updated checklist of Thai liverworts and hornworts based on the literatures and their currently collections, including 376 species of liverworts. In recent years, some additions of interesting liverworts to Thailand have been reported (Kornochalert et al., 2010; He et al. 2012, 2013; Kornochalert et al., 2012; Wei & Zhu 2013; Sukkharak, 2013).
    [Show full text]
  • Morphological Comparison Between Targionia Hypophylla L. and T
    Cryptogamie, Bryologie, 2018, 39 (4): 451-458 © 2018 Adac. Tous droits réservés Morphological comparison between Targionia hypophylla L. and T. stellaris (Marchantiophyta) in subtropical Argentina with novel description of the sporophyte of T. stellaris Jorge R. FLORES a,b *,Ignacio JIMÉNEZ a and Guillermo M. SUÁREZ a,b aFacultad de Ciencias Naturales eInstituto Miguel Lillo -Universidad Nacional de Tucumán; Miguel Lillo 205, (4000) San Miguel de Tucumán, Tucumán, Argentina bUnidad Ejecutora Lillo (CONICET-FML), Miguel Lillo 251, (4000) San Miguel de Tucumán, Tucumán, Argentina. Abstract – Amorphological comparison between Targionia hypophylla L. and T. stellaris Hässel is carried out based on fertile material from northern Argentina. The two species differed in alarge number of gametophytic traits, including: epidermal pores, antheridia location and ventral scales shape. The spores of T. stellaris are also described in detail and compared to those of T. hypophylla;their potential taxonomic value is discussed in depth. The first photomicrographs of T. stellaris are provided. Morphology / Targionia stellaris / Targionia hypophylla /Taxonomy /South America INTRODUCTION Targionia L. stands as one of the earliest generic names proposed to include complex thalloid liverworts (Schuster,1992). The genus is easily distinguished from remaining liverworts by the bivalved involucre below the thallus apex and its frequent dark-purple colour.Along with the development of dark pigments, the thallus characteristically rolls up to avoid desiccation and is rarely found with its margins fully extended (Bischler et al.,2005; Hässel de Menéndez, 1963). Although several species were ascribed to the genus (Söderström et al., 2016), many are often treated as synonyms of T. hypophylla L.
    [Show full text]
  • Article ISSN 2381-9685 (Online Edition)
    Bry. Div. Evo. 043 (1): 284–306 ISSN 2381-9677 (print edition) DIVERSITY & https://www.mapress.com/j/bde BRYOPHYTEEVOLUTION Copyright © 2021 Magnolia Press Article ISSN 2381-9685 (online edition) https://doi.org/10.11646/bde.43.1.20 Advances in understanding of mycorrhizal-like associations in bryophytes SILVIA PRESSEL1*, MARTIN I. BIDARTONDO2, KATIE J. FIELD3 & JEFFREY G. DUCKETT1 1Life Sciences Department, The Natural History Museum, Cromwell Road, London SW7 5BD, UK; �[email protected]; https://orcid.org/0000-0001-9652-6338 �[email protected]; https://orcid.org/0000-0001-7101-6673 2Imperial College London and Royal Botanic Gardens, Kew TW9 3DS, UK; �[email protected]; https://orcid.org/0000-0003-3172-3036 3 Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2TN, UK; �[email protected]; https://orcid.org/0000-0002-5196-2360 * Corresponding author Abstract Mutually beneficial associations between plants and soil fungi, mycorrhizas, are one of the most important terrestrial symbioses. These partnerships are thought to have propelled plant terrestrialisation some 500 million years ago and today they play major roles in ecosystem functioning. It has long been known that bryophytes harbour, in their living tissues, fungal symbionts, recently identified as belonging to the three mycorrhizal fungal lineages Glomeromycotina, Ascomycota and Basidiomycota. Latest advances in understanding of fungal associations in bryophytes have been largely driven by the discovery, nearly a decade ago, that early divergent liverwort clades, including the most basal Haplomitriopsida, and some hornworts, engage with a wider repertoire of fungal symbionts than previously thought, including endogonaceous members of the ancient sub-phylum Mucoromycotina.
    [Show full text]
  • Lectotypification of the Linnaean Name Marchantia Hemisphaerica L
    Cryptogamie, Bryologie, 2013, 34 (1): 89-91 © 2013 Adac. Tous droits réservés Lectotypification of the Linnaean name Marchantia hemisphaerica L. (Aytoniaceae) Duilio IAMONICOa*, Mauro IBERITEb aLaboratory of Phytogeography and Applied Geobotany, Dept. DATA, Sect. Environment and Landscape, University of Rome Sapienza, Via Flaminia 72, 00196 Rome, Italy bDepartment of Environmental Biology, University of Rome Sapienza, 00185 Rome, Italy Résumé – La typification du nom Marchantia hemisphaerica L. [≡ Reboulia hemisphaerica (L.) Raddi] (Aytoniaceae) est discutée. Un spécimen de l’herbier Linnaeus (LINN) est désigné comme lectotype. Noms linnéens / Marchantia / Reboulia / typification Abstract – The typification of the name Marchantia hemisphaerica L. [≡ Reboulia hemisphaerica (L.) Raddi] (Aytoniaceae) is discussed. A specimen from the Linnaean Herbarium (LINN) is designated as the lectotype. Linnaean names / Marchantia / Reboulia / typification Marchantia L. (Marchantiaceae Lindl.) is a genus of 36 species with a worldwide distribution (Bischler, 1998). Linnaeus (1753) published seven names under Marchantia (Jarvis, 2007) of which only two (M. chenopoda and M. polymorpha) are now referred to the genus. The other names apply to species that are now placed in other genera (see Jarvis, 2007: 655-656). Among them is M. hemisphaerica L., a species now referred to the genus Reboulia Raddi (1818), as R. hemisphaerica (L.) Raddi. As this name appears to be untypified, a typification is undertaken here. The protologue of M. hemisphaerica (Linnaeus, 1753: 1138) consists of a short morphological diagnosis, taken from Linnaeus (1737: 424, 1745: 932) and van Royen (1740: 507), with three synonyms cited from Micheli (1729: t. 2 f. 2), Dillenius (1741: t. 75 f. 2) and Buxbaum (1728: t.
    [Show full text]
  • A Note on Asterella Khasyana (Griff.) Pandé, K.P. Srivast. and Sultan Khan (Marchantiales, Aytoniaceae) in Thailand
    The Natural History Journal of Chulalongkorn University 7(2): 109-113, October 2007 ©2007 by Chulalongkorn University A Note on Asterella khasyana (Griff.) Pandé, K.P. Srivast. and Sultan Khan (Marchantiales, Aytoniaceae) in Thailand THAWEESAKDI BOONKERD1*, ROSSARIN POLLAWATN1, SAHUT CHANTANAORRAPINT2 AND MING JOU LAI3 1Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, THAILAND 2Department of Biology, Faculty of Science, Prince of Songkhla University, Hat Yai, Songkla 90112, THAILAND 3Department of Landscape Architecture, Tunghai University, Taichung, TAIWAN ABSTRACT.– An addition to the Bryoflora of Thailand, Asterella khasyana (Griff.) Pandé, K.P. Srivast. and Sultan Khan, is reported for the first time. This newly recorded species is described and illustrated. SEM images of spores are also presented. KEY WORDS: Asterella, thalloid liverwort, Thailand although some species have rather INTRODUCTION restricted distributions (Long, 2005, 2006). The genus was intensively studied by D.G. Asterella is a thalloid hepatic genus Long and co-workers (Long, 1998, 1999, belonging to the family Aytoniaceae in the 2005, 2006; Long, Möller and Preston, order Marchantiales (Long, 2006). The 2000). In Thailand, only one species, genus has a surprisingly wide variability in namely A. blumeana (Nees) Kachroo, has potentially important morphological been recorded previously, from Doi Chiang characters. For example, the position of Dao, Chiang Mai Province, northern archegoniophores and androecia on the Thailand (Giesy and Richards, 1959). thallus, the shape of the carpocephalum, Here, we report an additional species in the presence or absence of air chambers in Thailand, Asterella khasyana (Griff.) the stalk of the carpocephalum, spore Pandé, K.P. Srivast. and Sultan Khan colour, spore ridging or reticulation (Long, which was found during the surveys of Möller and Preston, 2000).
    [Show full text]
  • Supporting References for Nelson & Ellis
    Supplemental Data for Nelson & Ellis (2018) The citations below were used to create Figures 1 & 2 in Nelson, G., & Ellis, S. (2018). The History and Impact of Digitization and Digital Data Mobilization on Biodiversity Research. Publication title by year, author (at least one ADBC funded author or not), and data portal used. This list includes papers that cite the ADBC program, iDigBio, TCNs/PENs, or any of the data portals that received ADBC funds at some point. Publications were coded as "referencing" ADBC if the authors did not use portal data or resources; it includes publications where data was deposited or archived in the portal as well as those that mention ADBC initiatives. Scroll to the bottom of the document for a key regarding authors (e.g., TCNs) and portals. Citation Year Author Portal used Portal or ADBC Program was referenced, but data from the portal not used Acevedo-Charry, O. A., & Coral-Jaramillo, B. (2017). Annotations on the 2017 Other Vertnet; distribution of Doliornis remseni (Cotingidae ) and Buthraupis macaulaylibrary wetmorei (Thraupidae ). Colombian Ornithology, 16, eNB04-1 http://asociacioncolombianadeornitologia.org/wp- content/uploads/2017/11/1412.pdf [Accessed 4 Apr. 2018] Adams, A. J., Pessier, A. P., & Briggs, C. J. (2017). Rapid extirpation of a 2017 Other VertNet North American frog coincides with an increase in fungal pathogen prevalence: Historical analysis and implications for reintroduction. Ecology and Evolution, 7, (23), 10216-10232. Adams, R. P. (2017). Multiple evidences of past evolution are hidden in 2017 Other SEINet nrDNA of Juniperus arizonica and J. coahuilensis populations in the trans-Pecos, Texas region.
    [Show full text]
  • Volume 1, Chapter 3-1: Sexuality: Sexual Strategies
    Glime, J. M. and Bisang, I. 2017. Sexuality: Sexual Strategies. Chapt. 3-1. In: Glime, J. M. Bryophyte Ecology. Volume 1. 3-1-1 Physiological Ecology. Ebook sponsored by Michigan Technological University and the International Association of Bryologists. Last updated 3 June 2020 and available at <http://digitalcommons.mtu.edu/bryophyte-ecology/>. CHAPTER 3-1 SEXUALITY: SEXUAL STRATEGIES JANICE M. GLIME AND IRENE BISANG TABLE OF CONTENTS Expression of Sex ......................................................................................................................................... 3-1-2 Unisexual and Bisexual Taxa ........................................................................................................................ 3-1-2 Sex Chromosomes ................................................................................................................................. 3-1-6 An unusual Y Chromosome ................................................................................................................... 3-1-7 Gametangial Arrangement ..................................................................................................................... 3-1-8 Origin of Bisexuality in Bryophytes ............................................................................................................ 3-1-11 Monoicy as a Derived/Advanced Character? ........................................................................................ 3-1-11 Multiple Reversals ..............................................................................................................................
    [Show full text]
  • The Thallose Liverworts of California
    THE THALLOSE LIVERWORTS OF CALIFORNIA A Thesis Presented to the Graduate Faculty of Humboldt State University In Partial Fuifiliment of the Requirements for the Degree Master of Arts By Alan Whittemore May 1982 THE THALLOSE LIVERWORTS OF CALIFORNIA By Alan T. Whittemore Approved: Date: INTRODUCTION Since the first representative collections of California liverworts were made over a century ago, the state has been known for the diversity of morphological types it contains. The important patterns in most higher taxa are present and often abundantly represented (Campbell, 1938), a situation particularly striking when compared with the cool-temperate areas of northeastern North America and northern Europe where most hepatic taxonomists have worked. These areas are poor in several groups, including most of the large order Marchantiales. While the pioneer- ing publications of Howe (1899) and Campbell (1895) stim- ulated a number of California collectors and morphologists to study the local hepatics in the first half of this century, these books were not adequately revised or replaced and study of this group virtually stopped. Works published in eastern North America and Europe, such as those of Schuster (1966-81), Macvicar (1926), and Mueller (1952- 58) are useful for the identification of California's leafy hepatics, but the large Marchantiales which form such a conspicuous and distinctive part of our flora are mostly absent from these areas, and are thus difficult to 2 identify. Furthermore, workers from these areas, who have no need to make distinctions among many species in these groups, and who often lack access to abundant material, have failed to describe many taxonomically useful charac- ters, particularly in the vegetative thallus of the Marchantiales.
    [Show full text]
  • Diversity of Bryophytes in Aizawl District, Mizoram, Northeast India
    International Journal of Science and Research (IJSR) ISSN (Online): 2319-7064 Index Copernicus Value (2013): 6.14 | Impact Factor (2013): 4.438 Diversity of Bryophytes in Aizawl District, Mizoram, Northeast India Ramachandra Laha1, Lalhriatpuia2 1Department of Botany, School of life Science, Mizoram University, Tanhril-796004, Mizoram, India 2Department of Botany, School of life Science, Mizoram University, Tanhril-796004, Mizoram, India Abstract: The present study deals with the investigation of bryophytic flora of Aizawl District, Mizoram. In the present investigations a total of 41 taxa of Bryophytes distributed under 34 genera and 23 families have been recorded. Of these, the mosses are represented by 23 species of 20 genera and 14 families, while Liverworts are represented by 15 species of 12 genera and 8 families. Hornworts are represented by 3 species of 2 genus belonging to 1 family. The present study reveals that Bryaceae, Dicranaceae, Aytoniaceae, Marchantiaceae, Funariaceae and Anthocerotaceae are dominant families in the study area. Keywords: Diversity, Aizawl, Mizoram, Northeast, Bryophytes 1. Introduction Aizawl district, Mizoram occupies an area of approximately 3577 sq. km, located north of the Tropic of Cancer in the The bryophytes which comprises liverworts, hornworts and northern part of Mizoram. The altitude ranges between 500m mosses are widely distributed, generally dominate in between to 1800m above sea level. The climate pattern is moist the altitude 1000-8000 metres and they are important tropical to moist sub-tropical due to its location and elevation components of the vegetation in many regions of the world with an average annual rainfall of 215cm. In the summer the and are important components in many forest ecosystems and temperature ranges from 20–32 °C and in the winter 11–21 constitute a major part of the biodiversity in moist °C.
    [Show full text]
  • Aneuraceae Antheliacee Anthocerotaceae Aytoniaceae Blasiaceaeceae Blepharostoma
    Catalog of the Colorado Flora: a Biodiversity Baseline Liverworts: Weber and Wittmann, electronic version 11-Mar-00 Aneuraceae Aneura Dumortier, 1822 Aneura pinguis (L.) Dumortier Riccardia pinguis (L.) S. Gray. WEBER63. Antheliacee Anthelia (Dumortier) Dumortier, 1835 Anthocerotaceae Carpobolus Schweinitz, 1822 Carpobolus orbicularis Schweinitz Notothylas orbicularis (Schweinitz) Sullivant. WEBER63. Phaeoceros Proskauer, 1951 Phaeoceros laevis (L.) Proskauer WEBER63. Aytoniaceae Asterella P. Beauvois, 1805 Asterella gracilis (F. Weber) Underwood Annotations by Marie L. Hicks. Asterella ludwigii (Schwaegrichen) Underwood. EVANS15A. Asterella lindenbergiana (Corda) Lindberg Summit Co.: Monte Cristo Creek, 11,000 ft., Weber & Holmen B-4428, !M. L. Hicks, 1993.. Mannia Opiz, 1829 Mannia fragrans (Balbis) Frye & Clark EVANS15A. Plagiochasma erythrospermum Sullivant ex Austin. Proc. Acad. Sci. Phila. 21:229. 1870. Type: "Rocky Mountains", [E. Hall]. The description refers to the conspicuous tuft of terminal white paleae characteristic of [Mannia fragrans].. Type specimen from Colorado. Mannia rupestris (Nees) Frye & Clark WEBER63. Mannia sibirica (K. Mueller) Frye & Clark SCHUS92. BACA CO.: Big Hole Canyon, Weber 100956. Plagiochasma Lehmann & Lindenberg, 1832 Plagiochasma rupestre (Forster) Stephani EVANS15B; WEBER63. Plagiochasma wrightii Sullivant EVANS15B; WEBER63. Reboulia Raddi, 1818 Reboulia hemispherica (L.) Raddi EVANS15A. Baca Co.: Sand Creek Canyon, 5 May 1949, Weber L23660. Boulder Co.: Four Mile Canyon between Salina and Crisman, 27 Nov. 1949, Weber B-15736 (COLO).. Blasiaceaeceae Blasia L., 1753 Blasia pusilla (L.) Michaux WEBER63. Blepharostoma Page 1 of 7 Catalog of the Colorado Flora: a Biodiversity Baseline Liverworts: Weber and Wittmann, electronic version 11-Mar-00 Blepharostoma (Dumortier) Dumortier, 1835 Blepharostoma trichophyllum (L.) Dumortier EVANS15A. Calypogeiaceae Calypogeia Raddi, 1820 HONG90 original spelling Calypogeja. Calypogeia integristipula Stephani HONG90.
    [Show full text]