Arctoa (2015) 24: 382-388 doi: 10.15298/arctoa.24.31 NOTES ON PHILONOTIS (BARTRAMIACEAE, MUSCI). 15. PHILONOTIS ON MT. KILIMANJARO, TANZANIA ЗАМЕТКИ О PHILONOTIS (BARTRAMIACEAE, MUSCI). 15. PHILONOTIS НА ГОРЕ КИЛИМАНДЖАРО, TАНЗАНИЯ TIMO KOPONEN1 ТИМО КОПОНЕН1 Abstract Altogether ten species of Philonotis (Hedw.) Brid. have been recorded from Mt. Kilimanjaro, however only six of them are confirmed. The Kilimanjaron specimens named as P. fontana and P. tomentella differ from the representatives of the high arctic to boreal populations, and are excluded. A key to the accepted species and descriptions and illustrations of P. schroederi and P. tricolor are provided. P. platyneura is synonymized with P. tricolor. The relationship of P. globosa with P. schroederi needs a further study and the presence of P. dregeana on Kilimanjaro needs to be confirmed. Addi- tional notes are given of P. falcata (W.J. Hook.) Mitt., P. heleniana (Mitt.) Herz., P. helenica (Besch.) Par. and P. usambarica Broth. Lectotypes are designated for P. tricolor and Bartramia gemmascens Müll.Hal. (= Philonotis gemmascens) and Philonotis section Leiocarpus Broth. The taxonomy of the sections of Philonotis is discussed; two sections, Philonotis and Philonotula (Bruch, Schimp. & Gümbel) A. Jaeger include most of the species. P. dregeana (Müll.Hal.) A. Jaeger, P. gemmascens (Müll.Hal.) Par., P. globosa (Müll.Hal.) D.G. Griffin & W.R. Buck, P. marangensis Broth. (= P. hastata (Duby) Wijk & Margad.) and P. schroederi Broth. belong to the section Philonotula. P. fontana (Hedw.) Brid., P. platyneura P.Varde, P. tomentella Molendo and P. tricolor (Müll.Hal.) Par. are the species of the section Philonotis. Резюме Для горы Килиманджаро приводилось 10 видов из рода Philonotis (Hedw.) Brid., однако только 6 из них подтверждаются в данной ревизии. Образцы с Килиманджаро, определенные как P. fontana и P. tomentella, отличаются от растений из арктических и бореальных популяций, и эти виды должны быть исключены из списка. Дан ключ для принимаемых видов, а также описания и иллюстрации для P. schroederi и P. tricolor. P. platyneura синонимизируется с P. tricolor. Взаимоотношения P. globosa с P. schroederi нуждаются в дальнейшем изучении; для P. dregeana необходимо подтвердить его присутствие на Килиманджаро. Приводятся дополнительные заметки, касающиеся P. falcata (W.J. Hook.) Mitt., P. heleniana (Mitt.) Herz., P. helenica (Besch.) Par. и P. usambarica Broth. Выбраны лектотипы для P. tricolor, Bartramia gemmascens Müll.Hal. (= Philonotis gemmascens) и Philonotis section Leiocarpus Broth. Обсуждается таксономия секций рода Philonotis; две секции, Philonotis и Philonotula (Bruch, Schimp. & Gümbel) A. Jaeger включают большинство видов. P. dregeana (Müll.Hal.) A. Jaeger, P. gemmascens (Müll.Hal.) Par., P. globosa (Müll.Hal.) D.G. Griffin & W.R. Buck, P. marangensis Broth. (= P. hastata (Duby) Wijk & Margad.) и P. schroederi Broth. относятся к секции Philonotula. P. fontana (Hedw.) Brid., P. platyneura P.Varde, P. tomentella Molendo и P. tricolor (Müll.Hal.) Par. принадлежат секции Philonotis. KEYWORDS: Africa, Bartramiaceae, Kenya, Mt. Kilimanjaro, nomenclature, Philonotis, sections of Philonotis, Tanzania, taxonomy INTRODUCTION Broth., P. tomentella Molendo and P. tricolor (Müll.Hal.) According to Kis (1985), altogether 393 species of Par. In addition, Philonotis dregeana (Müll.Hal.) A. Jae- mosses and nine species of Philonotis (Hedw.) Brid. have ger was listed from Mt. Kilimanjaro by Pócs (1994). The been recorded from Mt. Kilimanjaro, Tanzania: P. fon- specimens of Philonotis section Philonotis, P. fontana, tana (Hedw.) Brid., P. gemmascens (Müll.Hal.) Par., P. P. platyneura and P. tomentella are revised and other globosa (Müll.Hal.) D.G. Griffin & W.R. Buck (as Bar- taxa discussed. tramidula g.), P. marangensis Broth. (= P. hastata (Duby) The specimens of Philonotis fontana and P. tomen- Wijk & Margad.), P. platyneura P.Varde, P. schroederi tella for this revision came from the Cryptogamic Her- 1 – Finnish Museum of Natural History LUOMUS, Botany Unit (Bryology), P.O. Box 7, FI-00014 UNIVERSITY OF HELSINKI, Finland; and Finnish-Chinese Botanical Foundation, Mailantie 109, FI-08800 LOHJA, Finland Notes on Philonotis (Bartramiaceae, Musci). 15. Philonotis on Mt. Kilimanjaro, Tanzania 383 Fig. 1. Philonotis tricolor (Müll.Hal.) Par. (a–i: from KRAM-B 102454; j: from KRAM–B 047403, P. tricolor modification “platyneura”). a – capsule, dry; b – basal laminal cells; c –median laminal cells; d – upper leaf cells at margin; e – three leaves from female stem; f – perichaetial leaves; g – three leaves from innovation branch of female plant; h – three leaves from male stem; i – three perigonial leaves; j – four stem leaves from depauperate plant. The scale “1 mm” for a and e–j, and the scale “100 μm” for b–d. barium, Botanical Department of Károly Esztrházy Col- peristome to erect capsule with reduced peristome may lege (EGR) and the Laboratory of Bryology, Institute of have taken place several times in different populations. Botany, Polish Academy of Sciences (KRAM). In addi- Bartramidula, including the species of the section Leio- tion, the collections in H and H-BR were studied. carpus, is heterogeneous and hardly a monophyletic en- THE SECTIONS OF PHILONOTIS (HEDW.) BRID. tity. In Virtanen’s (2003, fig. 1) study, using both mor- Griffin & Buck (1989) discussed on the taxonomy of phology and DNA sequence data, Philonotis bartramio- Philonotis in relation to the genus Bartramidula Bruch ides (Griff.) D.G. Griffin & W.R. Buck (= Bartramidula & Schimp. The small size and globose to ovate, erect bartramioides) is included in the same clade with P. fal- capsule with reduced peristome or eperistomate capsule cata (W.J. Hook.) Mitt., P. thwaitesii Mitt. and P. vescoa- have been the major characters separating Bartramidula na (Besch.) Par. of the section Philonotula. from Philonotis. However, there is no gametophytic di- In addition to the section Leiocarpus, Brotherus agnostic character distinguishing Bartramidula from (1924) had sections Philonotula (Bruch, Schimp. & Güm- Philonotis. Leaf shape, cell size, degree of costa percur- bel) A. Jaeger, Catenularia (Müll.Hal.) Par., Eu-Philono- rency and papillosity of leaves do not represent major tis Braithw. (nom. illeg.), Pseudo-Mniobryum Broth. and differences from those found in Philonotis. Griffin & Buck Pseudo-Philonotis M. Fleisch. Pseudo-Philonotis is now (1989) concluded that most of the species of Bartramid- regarded as a genus of its own, Fleischerobryum Loeske, ula should be relocated under Philonotis section Leio- and the sections Catenularia (Philonotis scabrifolia carpus Broth., originally distinguished by Brotherus (Hook.f. & Wils.) Braithw.) and Pseudo-Mniobryum (1924) by having single peristome. However, Philonotis (Philonotis vagans (Hook.f. & Wils.) Mitt.) have only section Bartramidula antedates the section Leiocarpus one species each. The species of Brotherus’ (1924) sec- (see below). The species of Bartramidula are mostly tion “Eu-Philonotis”, which have major papillae at the small-sized plants growing on ephemeral habitats. The proximal end of leaf cells, form the present section erect capsule with reduced peristome is a common phe- Philonotis, and the species with the papillae at the distal nomenon of such plants in other groups of mosses, for end of leaf cells are in the section Philonotula. By this, instance in some genera of the Pottiaceae. The evolution Philonotis contains only two sections with a large num- in Philonotis from a horizontal capsule with complete ber of species, the sections Philonotis and Philonotula. 384 T. KOPONEN Fig. 2. Philonotis schroederi Broth. (from the holotype, 9.IX.1910 Br. Schroeder 131, H-BR3084011). a – capsule, dry; b – stem leaves of female plant; c – perichaetial leaves; d – basal laminal cells; e – median leaf cells; f – geminate leaf margin at upper leaf. The scale “1 mm” for a–c, and the scale “100 μm” for d–f. 3. Basal leaf cells or all leaf cells ± thin-walled or firm, quadrate, rectangular or rhomboidal, nearly smooth or low mammillose; nerve not reaching apex or per- current in shortly acute innovation leaves, often short- ly excurrent on acute stem leaves; marginal teeth blunt ....................................................................... 4 — Basal leaf cells thin- or firm-walled, mostly rectan- gular to linear, mammillose or papillose; innovation leaves acute; nerve percurrent or excurrent in all leaves; leaf marginal teeth sharp ........................... 5 4. Costa nearly smooth ............................... P. hastata — Costa rough by many large teeth ...... P. usambarica 5. Leaves distinctly in five rows (best seen on imbri- cate innovations), falcate and carinate, triangular and These sections were distinct in a phylogenetic analyses acute with percurrent nerve or acuminate with ex- using DNA methods (Koponen et al., 2012). current nerve, nerve flexuose; leaf marginal teeth The globose to ovate and erect capsule remains to be mostly single ............................................. P. falcata a useful specific character in Philonotis. However, the — Leaves not in rows, straight or slightly falcate-se- specimens of Philonotis with sporophytes are not com- cund or flexuose, plane or slightly concave; leaf mon. Usually the identification based on the characters marginal teeth single or geminate-dentate; nerve of fully developed sterile specimens is possible. There- straight ............................................. P. gemmascens fore here, as well as