Phytochemical and Proximate Analysis of the Leaf, Stem and Root of Securinega Virosa
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Sistema De Clasificación Artificial De Las Magnoliatas Sinántropas De Cuba
Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver Tesis doctoral de la Univerisdad de Alicante. Tesi doctoral de la Universitat d'Alacant. 2007 Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver PROGRAMA DE DOCTORADO COOPERADO DESARROLLO SOSTENIBLE: MANEJOS FORESTAL Y TURÍSTICO UNIVERSIDAD DE ALICANTE, ESPAÑA UNIVERSIDAD DE PINAR DEL RÍO, CUBA TESIS EN OPCIÓN AL GRADO CIENTÍFICO DE DOCTOR EN CIENCIAS SISTEMA DE CLASIFICACIÓN ARTIFICIAL DE LAS MAGNOLIATAS SINÁNTROPAS DE CUBA Pedro- Pabfc He.r retira Qltver CUBA 2006 Tesis doctoral de la Univerisdad de Alicante. Tesi doctoral de la Universitat d'Alacant. 2007 Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver PROGRAMA DE DOCTORADO COOPERADO DESARROLLO SOSTENIBLE: MANEJOS FORESTAL Y TURÍSTICO UNIVERSIDAD DE ALICANTE, ESPAÑA Y UNIVERSIDAD DE PINAR DEL RÍO, CUBA TESIS EN OPCIÓN AL GRADO CIENTÍFICO DE DOCTOR EN CIENCIAS SISTEMA DE CLASIFICACIÓN ARTIFICIAL DE LAS MAGNOLIATAS SINÁNTROPAS DE CUBA ASPIRANTE: Lie. Pedro Pablo Herrera Oliver Investigador Auxiliar Centro Nacional de Biodiversidad Instituto de Ecología y Sistemática Ministerio de Ciencias, Tecnología y Medio Ambiente DIRECTORES: CUBA Dra. Nancy Esther Ricardo Ñapóles Investigador Titular Centro Nacional de Biodiversidad Instituto de Ecología y Sistemática Ministerio de Ciencias, Tecnología y Medio Ambiente ESPAÑA Dr. Andreu Bonet Jornet Piiofesjar Titular Departamento de EGdfegfe Universidad! dte Mearte CUBA 2006 Tesis doctoral de la Univerisdad de Alicante. Tesi doctoral de la Universitat d'Alacant. 2007 Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver I. INTRODUCCIÓN 1 II. ANTECEDENTES 6 2.1 Historia de los esquemas de clasificación de las especies sinántropas (1903-2005) 6 2.2 Historia del conocimiento de las plantas sinantrópicas en Cuba 14 III. -
06 34110Nys111018 40
New York Science Journal 2018;11(10) http://www.sciencepub.net/newyork Pollen Morphology of Some Phyllanthus Species in Nigeria Wahab, Olasumbo Monsurat1 and Ayodele, Abiodun Emmanuel2 1. Department of Crop Production Technology, Federal College of Forestry, Ibadan. Nigeria 2. Department of Botany, University of Ibadan, Ibadan. Nigeria [email protected] Abstract: Circumscription of the genus Phyllanthus has been a cause of much confusion and disagreement. The fact that many herbaceous Phyllanthus species grow in similar habitats and share common vernacular names in Nigeria give rise to misidentifications. Field and Herbarium observations of some Phyllanthus species show that there are similarities of highly conspicuous morphological features, making identification of the species difficult. The pollen grain morphology of 18 field specimens comprising 10 Phyllanthus species using light microscope was therefore analysed in the present study with the aim of providing additional information on their taxonomy. The pollen type of the species have 3 – colporate, finely reticulate pollen without much ornamentation. Pollens were prolate, subprolate in shape in all taxa except P. muellerianus which was oblate–spheroidal. The pollen grains ranged in size from small in P. amarus, P. muellerianus, P. maderaspatensis, P. pentandrus and P. reticulatus to medium in P. maderaspatensis, P. capillaris, P. niruroides, P. odontadenius and P. urinaria. The smallest pollen size was observed in P. muellerianus being 12.4m by 13.0m while the largest pollen size was observed in P. capillaris being 31.5m by 23.25m. The colpi length ranged from 12.2m in P. muellerianus to 26.75m in P. urinaria while the percentage polar over equatorial axis ranged from 95.4% in P. -
Dry Forest Trees of Madagascar
The Red List of Dry Forest Trees of Madagascar Emily Beech, Malin Rivers, Sylvie Andriambololonera, Faranirina Lantoarisoa, Helene Ralimanana, Solofo Rakotoarisoa, Aro Vonjy Ramarosandratana, Megan Barstow, Katharine Davies, Ryan Hills, Kate Marfleet & Vololoniaina Jeannoda Published by Botanic Gardens Conservation International Descanso House, 199 Kew Road, Richmond, Surrey, TW9 3BW, UK. © 2020 Botanic Gardens Conservation International ISBN-10: 978-1-905164-75-2 ISBN-13: 978-1-905164-75-2 Reproduction of any part of the publication for educational, conservation and other non-profit purposes is authorized without prior permission from the copyright holder, provided that the source is fully acknowledged. Reproduction for resale or other commercial purposes is prohibited without prior written permission from the copyright holder. Recommended citation: Beech, E., Rivers, M., Andriambololonera, S., Lantoarisoa, F., Ralimanana, H., Rakotoarisoa, S., Ramarosandratana, A.V., Barstow, M., Davies, K., Hills, BOTANIC GARDENS CONSERVATION INTERNATIONAL (BGCI) R., Marfleet, K. and Jeannoda, V. (2020). Red List of is the world’s largest plant conservation network, comprising more than Dry Forest Trees of Madagascar. BGCI. Richmond, UK. 500 botanic gardens in over 100 countries, and provides the secretariat to AUTHORS the IUCN/SSC Global Tree Specialist Group. BGCI was established in 1987 Sylvie Andriambololonera and and is a registered charity with offices in the UK, US, China and Kenya. Faranirina Lantoarisoa: Missouri Botanical Garden Madagascar Program Helene Ralimanana and Solofo Rakotoarisoa: Kew Madagascar Conservation Centre Aro Vonjy Ramarosandratana: University of Antananarivo (Plant Biology and Ecology Department) THE IUCN/SSC GLOBAL TREE SPECIALIST GROUP (GTSG) forms part of the Species Survival Commission’s network of over 7,000 Emily Beech, Megan Barstow, Katharine Davies, Ryan Hills, Kate Marfleet and Malin Rivers: BGCI volunteers working to stop the loss of plants, animals and their habitats. -
Wood Anatomy of Flueggea Anatolica (Phyllanthaceae)
IAWA Journal, Vol. 29 (3), 2008: 303–310 WOOD ANATOMY OF FLUEGGEA ANATOLICA (PHYLLANTHACEAE) Bedri Serdar1,*, W. John Hayden2 and Salih Terzioğlu1 SUMMARY Wood anatomy of Flueggea anatolica Gemici, a relictual endemic from southern Turkey, is described and compared with wood of its pre- sumed relatives in Phyllanthaceae (formerly Euphorbiaceae subfamily Phyllanthoideae). Wood of this critically endangered species may be characterized as semi-ring porous with mostly solitary vessels bearing simple perforations, alternate intervessel pits and helical thickenings; imperforate tracheary elements include helically thickened vascular tracheids and septate libriform fibers; axial parenchyma consists of a few scanty paratracheal cells; rays are heterocellular, 1 to 6 cells wide, with some perforated cells present. Anatomically, Flueggea anatolica possesses a syndrome of features common in Phyllanthaceae known in previous literature as Glochidion-type wood structure; as such, it is a good match for woods from other species of the genus Flueggea. Key words: Flueggea anatolica, Euphorbiaceae, Phyllanthaceae, wood anatomy, Turkey. INTRODUCTION The current concept of the genus Flueggea Willdenow stems from the work of Webster (1984) who succeeded in disentangling the genus from a welter of other Euphorbiaceae (sensu lato). Although previously recognized as distinct by a few botanists (Baillon 1858; Bentham 1880; Hooker 1887), most species of Flueggea had been confounded with the somewhat distantly related genus Securinega Commerson ex Jussieu in the -
Journal Arnold Arboretum
JOURNAL OF THE ARNOLD ARBORETUM HARVARD UNIVERSITY G. SCHUBERT T. G. HARTLEY PUBLISHED BY THE ARNOLD ARBORETUM OF HARVARD UNIVERSITY CAMBRIDGE, MASSACHUSETTS DATES OF ISSUE No. 1 (pp. 1-104) issued January 13, 1967. No. 2 (pp. 105-202) issued April 16, 1967. No. 3 (pp. 203-361) issued July 18, 1967. No. 4 (pp. 363-588) issued October 14, 1967. TABLE OF CONTENTS COMPARATIVE MORPHOLOGICAL STUDIES IN DILLENL ANATOMY. William C. Dickison A SYNOPSIS OF AFRICAN SPECIES OF DELPHINIUM J Philip A. Munz FLORAL BIOLOGY AND SYSTEMATICA OF EUCNIDE Henry J. Thompson and Wallace R. Ernst .... THE GENUS DUABANGA. Don M. A. Jayaweera .... STUDIES IX SWIFTENIA I MKUACKAE) : OBSERVATION UALITY OF THE FLOWERS. Hsueh-yung Lee .. SOME PROBLEMS OF TROPICAL PLANT ECOLOGY, I Pompa RHIZOME. Martin H. Zimmermann and P. B Two NEW AMERICAN- PALMS. Harold E. Moure, Jr NOMENCLATURE NOTES ON GOSSYPIUM IMALVACE* Brizicky A SYNOPSIS OF THE ASIAN SPECIES OF CONSOLIDA CEAE). Philip A. Munz RESIN PRODUCER. Jean H. Langenheim COMPARATIVE MORPHOLOGICAL STUDIES IN DILLKNI POLLEN. William C. Dickison THE CHROMOSOMES OF AUSTROBAILLVA. Lily Eudi THE SOLOMON ISLANDS. George W. G'dUtt A SYNOPSIS OF THE ASIAN SPECIES OF DELPII STRICTO. Philip A. Munz STATES. Grady L. Webster THE GENERA OF EUPIIORBIACEAE IN THE SOT TUFA OF 1806, AN OVERLOOI EST. C. V. Morton REVISION OF THE GENI Hartley JOURNAL OF THE ARNOLD ARBORETUM HARVARD UNIVERSITY T. G. HARTLEY C. E. WOOD, JR. LAZELLA SCHWARTEN Q9 ^ JANUARY, 1967 THE JOURNAL OF THE ARNOLD ARBORETUM Published quarterly by the Arnold Arboretum of Harvard University. Subscription price $10.00 per year. -
Securinega Alkaloids : Complex Structures, Potent Bioactivities, and Efficient Total Syntheses
Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2017 Securinega Alkaloids : Complex Structures, Potent Bioactivities, and Efficient Total Syntheses Wehlauch, Robin ; Gademann, Karl Abstract: The Securinega alkaloids feature a compact tetracyclic structural framework and can be divided into four subclasses characterized by either a bridged [2.2.2]‐ or a [3.2.1]‐bicyclic core with two homologous series in each subclass. In the last two decades, many innovative strategies to chemically access the Securinega alkaloids have been developed. This Focus Review discusses the selected structures and syntheses of representative members of the Securinega alkaloids. Ring‐closing metathesis has enabled the syntheses of securinine and norsecurinine, and different cycloaddition approaches were key to the syntheses of nirurine and virosaines A and B. Virosine A was accessed through a Vilsmeier–Haack/Mannich reaction cascade. A bio‐inspired vinylogous Mannich reaction has enabled the synthesis of allosecurinine and this strategy has been extended by an intramolecular 1,6‐addition to obtain bubbialidine and secuamamine E. A rearrangement process of the latter two alkaloids has furnished allonorsecurinine and allosecurinine, respectively. Finally, an expanded model for the biogenesis of the Securinega alkaloid subclasses is discussed. DOI: https://doi.org/10.1002/ajoc.201700142 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-150835 Journal Article Accepted Version Originally published at: Wehlauch, Robin; Gademann, Karl (2017). Securinega Alkaloids : Complex Structures, Potent Bioactiv- ities, and Efficient Total Syntheses. Asian Journal of Organic Chemistry, 6(9):1146-1159. -
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PPRROOGGRRAAMMAA DDEE DDOOCCTTOORRAADDOO CCOOOOPPEERRAADDOO DDEESSAARRRROOLLLLOO SSOOSSTTEENNIIIBBLLEE::: MMAANNEEJJOOSS FFOORREESSTTAALL YY TTUURRÍÍÍSSTTIIICCOO UUNNIIIVVEERRSSIIIDDAADD DDEE AALLIIICCAANNTTEE,,, EESSPPAAÑÑAA YY UUNNIIIVVEERRSSIIIDDAADD DDEE PPIIINNAARR DDEELL RRÍÍÍOO,,, CCUUBBAA TTEESSIIISS EENN OOPPCCIIIÓÓNN AALL GGRRAADDOO CCIIIEENNTTÍÍÍFFIIICCOO DDEE DDOOCCTTOORR EENN EECCOOLLOOGGÌÌÌAA SSIISSTTEEMMAA DDEE CCLLAASSIIFFIICCAACCIIÓÓNN AARRTTIIFFIICCIIAALL DDEE LLAASS MMAAGGNNOOLLIIAATTAASS SSIINNÁÁNNTTRROOPPAASS DDEE CCUUBBAA AASSPPIIIRRAANNTTEE::: LLiiicc... PPeeddrrroo PPaabbllloo HHeerrrrrreerrraa OOllliiivveerrr IIInnvveesstttiiiggaaddoorrr AAuuxxiiillliiiaarrr CCeenntttrrroo NNaacciiioonnaalll ddee BBiiiooddiiivveerrrssiiiddaadd IIInnsstttiiitttuutttoo ddee EEccoolllooggíííaa yy SSiiissttteemmáátttiiiccaa MMiiinniiissttteerrriiioo ddee CCiiieenncciiiaass,,, TTeeccnnoolllooggíííaa yy MMeeddiiioo AAmmbbiiieenntttee TTUUTTOORREESS::: CCUUBBAA DDrrraa... NNaannccyy EEssttthheerrr RRiiiccaarrrddoo NNááppoollleess IIInnvveesstttiiiggaaddoorrr TTiiitttuulllaarrr CCeenntttrrroo NNaacciiioonnaalll ddee BBiiiooddiiivveerrrssiiiddaadd IIInnsstttiiitttuutttoo ddee EEccoolllooggíííaa yy SSiiissttteemmáátttiiiccaa MMiiinniiissttteerrriiioo ddee CCiiieenncciiiaass,,, TTeeccnnoolllooggíííaa yy MMeeddiiioo AAmmbbiiieenntttee EESSPPAAÑÑAA DDrrr... AAnnddrrrééuu BBoonneettt IIInnvveesstttiiiggaaddoorrr TTiiitttuulllaarrr DDeeppaarrrtttaammeenntttoo ddee EEccoolllooggíííaa UUnniiivveerrrssiiiddaadd ddee AAllliiiccaanntttee CCUUBBAA -
Dryland Tree Data for the Southwest Region of Madagascar: Alpha-Level
Article in press — Early view MADAGASCAR CONSERVATION & DEVELOPMENT VOLUME 1 3 | ISSUE 01 — 201 8 PAGE 1 ARTICLE http://dx.doi.org/1 0.431 4/mcd.v1 3i1 .7 Dryland tree data for the Southwest region of Madagascar: alpha-level data can support policy decisions for conserving and restoring ecosystems of arid and semiarid regions James C. AronsonI,II, Peter B. PhillipsonI,III, Edouard Le Correspondence: Floc'hII, Tantely RaminosoaIV James C. Aronson Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 631 66-0299, USA Email: ja4201 [email protected] ABSTRACT RÉSUMÉ We present an eco-geographical dataset of the 355 tree species Nous présentons un ensemble de données éco-géographiques (1 56 genera, 55 families) found in the driest coastal portion of the sur les 355 espèces d’arbres (1 56 genres, 55 familles) présentes spiny forest-thickets of southwestern Madagascar. This coastal dans les fourrés et forêts épineux de la frange côtière aride et strip harbors one of the richest and most endangered dryland tree semiaride du Sud-ouest de Madagascar. Cette région possède un floras in the world, both in terms of overall species diversity and des assemblages d’arbres de climat sec les plus riches (en termes of endemism. After describing the biophysical and socio-eco- de diversité spécifique et d’endémisme), et les plus menacés au nomic setting of this semiarid coastal region, we discuss this re- monde. Après une description du cadre biophysique et de la situ- gion’s diverse and rich tree flora in the context of the recent ation socio-économique de cette région, nous présentons cette expansion of the protected area network in Madagascar and the flore régionale dans le contexte de la récente expansion du growing engagement and commitment to ecological restoration. -
Data on the Diet of Lepilemur Mittermeieri, a Sportive Lemur
Page 26 Lemur News Vol. 22, 2019/20 E.W.; Lambert, J.E.; Rovero, F. 2017. Impending extinction in north-west Madagascar. Lepilemur are known to be foli- crisis of the world’s primates: Why primates matter. Science vores with a low metabolic rate, but no specific investiga- Advances, 3:e1600946. Ganzhorn, J.U.; Lowry, P.P.; Schatz, G.E.; Sommer, S. 2001. The tion of the diet of Mittermeier’s sportive lemur has been biodiversity of Madagascar: one of the world’s hottest reported. In 2015 and 2016, we conducted a field study hotspots on its way out. Oryx 35: 346-348. of the species in two areas of the Ampasindava peninsula, de Gouvenain, R.C.; Silander, J.A. 2003. Littoral forest. Pp. 103- involving direct observation of individuals equipped with 111. In: Goodman, S.M. and Benstead, J.P. (eds). The natural history of Madagascar. University of Chicago Press, Chicago radio-collars. We verified that Mittermeier’s sportive lemur and London. is a solitary forager. We identified a total of 77 tree species Green, G.M.; Sussman, R.W. 1990. Deforestation history of the consumed and a large variation in the spectrum of species eastern rain forests of Madagascar from satellite images. Sci- used within the two studied sites. Most of the plant material ence 248: 212-215. Lewis Environmental Consultants. 1992. Madagascar Minerals consumed was made of leaves, with few fruits. Project. Environmental Impact Assessment Study. Part 1: Natural Environment. Appendix IV: Faunal Study. Introduction Mittermeier, RA.; Louis Jr, E.E.; Richardson, M.; Schwitzer, C.; For small-bodied folivores, gaining enough energy and nu- Langrand, O.; Rylands, A.B.; Hawkins, F.; Rajaobelina, S.; Ratsimbazafy, J.; Rasoloarison, R.; Roos, C.; Kappeler, P.M.; trients from a diet dominated by plant structural tissues Mackinnon, J. -
(Euphorbiaceae) Phyllanthus Are Arranged Into Two Morphological
Pollen morphology of the genus Phyllanthus (Euphorbiaceae) W. Punt Botanical Museum and Herbarium, State University, Utrecht (The Netherlands) (Received September 3, 1966) (Revised November 24, 1966) SUMMARY Some pollen types occurring in the genus Phyllanthus are arranged into two series morphological series. These are based on seven “evolutionary trends”. INTRODUCTION is the and most diversified the in the Phyllanthus largest genus among genera subfamily Phyllanthoideae of the Euphorbiaceae. Webster(1956-1958), at present undertaking a revision of Phyllanthus, estimates the total number of species at 650 and Léandri (1958), in Paris, suggested a probable total of 1,700 species. The includes of from such genus a great many types growth as trees, shrubs, annuals and perennial herbs. The distribution of the genus is circumtropical and well represented on all continents and particularly on the off-shore island groups and Caledonia. The classification of such as Cuba, Madagascar New present reflects the true between the Phyllanthus very inadequately relationships subgeneric taxa (Webster, 1956). current not Phyllanthus in its circumscription is entirely a natural genus. There differences in the flowers and fruits. It is are profound vegetative structure, not surprising that the pollen grains in this genus also show an extraordinary diversity of pollen types. In this short report the author will try to give a brief their outline of some pollen types and mutual relationships. The diversity, however, is so large, that such an outline can only be considered incomplete. METHODS AND TERMINOLOGY The pollen grains studied were treated according to the acetolysis method described by Erdtman in 1943 and revised by him in 1960. -
TAXON:Flueggea Virosa (Roxb. Ex Willd.) Royle SCORE:7.0 RATING:High Risk
TAXON: Flueggea virosa (Roxb. ex SCORE: 7.0 RATING: High Risk Willd.) Royle Taxon: Flueggea virosa (Roxb. ex Willd.) Royle Family: Phyllanthaceae Common Name(s): Chinese waterberry Synonym(s): Phyllanthus virosus Roxb. ex Willd. common bushweed Securinega virosa (Roxb. ex Willd.) Baill. simpleleaf bushweed snowberry tree white berry-bush Assessor: Chuck Chimera Status: Assessor Approved End Date: 14 Sep 2018 WRA Score: 7.0 Designation: H(HPWRA) Rating: High Risk Keywords: Dioecious Tree, Naturalized, Spiny Forms, Bird-Dispersed, Fire Resprouter Qsn # Question Answer Option Answer 101 Is the species highly domesticated? y=-3, n=0 n 102 Has the species become naturalized where grown? 103 Does the species have weedy races? Species suited to tropical or subtropical climate(s) - If 201 island is primarily wet habitat, then substitute "wet (0-low; 1-intermediate; 2-high) (See Appendix 2) High tropical" for "tropical or subtropical" 202 Quality of climate match data (0-low; 1-intermediate; 2-high) (See Appendix 2) High 203 Broad climate suitability (environmental versatility) y=1, n=0 y Native or naturalized in regions with tropical or 204 y=1, n=0 y subtropical climates Does the species have a history of repeated introductions 205 y=-2, ?=-1, n=0 y outside its natural range? 301 Naturalized beyond native range y = 1*multiplier (see Appendix 2), n= question 205 y 302 Garden/amenity/disturbance weed n=0, y = 1*multiplier (see Appendix 2) y 303 Agricultural/forestry/horticultural weed n=0, y = 2*multiplier (see Appendix 2) n 304 Environmental weed 305 Congeneric weed 401 Produces spines, thorns or burrs 402 Allelopathic 403 Parasitic y=1, n=0 n 404 Unpalatable to grazing animals y=1, n=-1 n 405 Toxic to animals y=1, n=0 y 406 Host for recognized pests and pathogens 407 Causes allergies or is otherwise toxic to humans y=1, n=0 n Creation Date: 14 Sep 2018 (Flueggea virosa (Roxb. -
Jablonskia, a New Genus of Euphorbiaceae from South America
SystematicBotany (1984), 9(2): pp. 229-235 ? Copyright1984 by the American Society of Plant Taxonomists Jablonskia,a New Genus of Euphorbiaceae fromSouth America GRADY L. WEBSTER Botany,University of California,Davis, California 95616 ABSTRACT.A new monotypicgenus, Jablonskia, based on the South American Securinegacon- gesta (Euphorbiaceae, Phyllanthoideae), resembles genera of the Antidesmeae in pollen and wood characters,but the floralstructure is more similar to that in genera of Aporuseae such as Ashtonia and Richeria.From Securinega,where it was originally placed, and the taxa of Antidesmeae and Aporuseae, Jablonskiamay be separated by a combination of characteristics:monoecious; inflores- cences axillary; flowersconspicuously bracteate,the staminatesessile; pollen grains prolate, exine tectate-perforate,germ pore lalongate; seeds with fleshy exotesta, paired in each locule of the irregularlydehiscing capsule; embryowith radicle equalling the cotyledons. Among the taxa of Euphorbiaceae that were Muell. Arg. was originallydescribed as a species never revised by Pax and Hoffmann in their of Phyllanthusby Mueller (1863) and later long series of monographictreatments is Phyl- transferredto Securinegaby Mueller (1873). lanthinae. As circumscribedby Pax and Hoff- Mueller referredthis species to his sect. Secu- mann (1931), this subtribe included five gen- rinegastrum[=sect. Securinega],which had pre- era: Zimmermannia,Securinega, Pleiostemon, viously included only the type species from Phyllanthus,and Reverchonia.Relationships in Mauritius, S. durissimaJ. F. Gmelin. Although this complex have remained rather poorly Bentham (1878, 1880) concurredwith its place- understood because of the lack of comprehen- ment in Securinega,the South American species sive study since the last, now badly outdated, is clearly anomalous because of its monoecy, treatments of Mueller (1866) and Bentham conspicuouslybracteate flowers, and seeds with (1880).