Selaginella trichophylla K.H. Shing, 1993

Shalimov, Aleksandr Petrovich, Wu, Yu-Dong & Zhang, Xian-Chun, 2019, A taxonomic revision of the genus Selaginella (Selaginellaceae) from Nepal, PhytoKeys 133, pp. 1-76 : 1

Selaginella trichophylla K.H. Shing Figs 6 (3 A–C), 10G , 29

Selaginella trichophylla K.H. Shing, Acta Phytotax. Sin. 31(6): 569, pl. 2. 1993; Zhang et al. 2013.

≡ Selaginella monospora Spring subsp. trichophylla (K.H. Shing) X.C. Zhang, Fl. Reipubl. Popularis Sin. 6(3): 189. 2004. Type. CHINA. Yunnan, Gongshan, Dulongjiang River, alt. 1450-1500 m, in sylvis frondosis, 22 VIII 1982, Qinghai-Xizang Exped. 9451 (holotype: PE! [00452190]).

= Selaginella monospora var. ciliolata W.M. Chu, Fl. Yunnan. 20: 719. 2006, syn. nov. Type. CHINA. Yunnan: Jingdong Xian, Ailao Shan, Xujiaba, alt. 2450 m., under evergreen broad-leaved forest, 22 Apr 1982, J.J. He 13352 (holotype: PYU!; isotype: PE!).

Description.

Plants 20-35 cm, creeping. Rhizophores at intervals throughout length of main stem, borne on ventral side in axils of branches. Main stems pinnately branched throughout, stramineous, 1.0-1.5 mm in diam., in lower part, stem oval or terete, not sulcate, primary leafy branches 8-12 pairs, once or twice pinnately branched, branches sparse or thick, adjacent primary branches on main stem 1.5-2.5 cm apart. Axillary leaves on branches symmetrical, ovate or ovate triangular, 1.2-3.1 × 0.7-2.3 mm, base exauriculate or slightly subcordate, margin ciliolate at base, apex acute. Dorsal leaves ovate, 1.1-2.6 × 0.6-1.2 mm, slightly carinate, base obtuse or oblique subcordate, not peltate, margin ciliolate (more densely ciliolate at base), apex aristate. Ventral leaves ovate-triangular, 1.5-3.6 × 0.9-2.1 mm, margin denticulate; basiscopic base in base with few cilia or entire, acroscopic base enlarged, broader, overlapping stem and branches, margin ciliolate, in upper part denticulate, apex acute. Strobili solitary, terminal, compact, dorsiventrally complanate, 4.0-6.5 × 1.2-2.6 mm, sporophylls dimorphic, resupinate, not white-margined; dorsal sporophylls ovate-lanceolate, carinate, margin denticulate, apex acuminate; ventral sporophylls ovate-lanceolate, carinate, margin denticulate. Megaspores whitish surface verrucate or papillate; microspores orange, surface verrucate.

Ecology.

On moist cliffs, in evergreen broad-leaved forest. Alt. 1500-1600(2200) m.

Distribution in Nepal.

C, E, rare, requiring additional research.

Nepalese threatened status: Data-deficient (DD) according to the IUCN (2001) criteria.

General distribution.

BHUTAN ("Rukubi (2600) - Chendebi (2300) - Charikhachor (2250) - Neylong (2200), 14 Apr 1967, H. Hara, H. Kanai, G. Murata, H. Ohashi, O. Tanaka & T. Yamazaki 4105 " (KYO); "Yuto La, between Bumthang and Trongsa, 8500 ft., Shady banks in deciduous forest. F. Ludlow, G. Sherriff, J.H. Hicks 17023 " (KYO; L.4328981)), CHINA (Yunnan, Guangxi, Guizhou, Guandong, Hainan), INDIA (Sikkim (E Sikkim District. Above and S. of Penlang Bazaar, below and on way up to Namphung Peak of the Tinjure ridge, W. of Tashi View-Point, Across valley to the north of Gangtok. Just below crest on N. side of densely mixed-forest ridge. 29 Sep 1998. C.R. Fraser-Jenkins 27054 (FN 3031) " (L.4328985)), VIETNAM (Cao Bang).

Chromosome number.

Not available data.

Selected specimens examined:

C Nepal: DOLAKHA: "Jiri, Dolakha, alt. c. 2200 m, 4 Oct 1988, T. Nakaike 3076 " (PE).

E Nepal: ILAM: "Mai Majuwa-Dhara Pani, alt. 1500-1600 m, 4 Dec 1963, H. Hara et al." (KUN; L.3498103).

Note.

We examined the type and general collections in herbaria PE, KUN and PYU for S. trichophylla and S. monospora var. ciliolata : the taxon described as S. monospora var. ciliolata W.M. Chu (in Chu 2006) and listed in the "Uncertain taxa" in Flora of China ( Zhang et al. 2013: 66) has many similarities in morphological features with S. trichophylla . The only distinct feature is the spinules on the upper side of the leaves, but these are not always present and it is likely that this trait is associated with a more humid habitat.

Figures

Figure 6. Morphological diversity of the leaves of Nepalese Sealginella species 1 A-C S. ciliaris (s. n. 1225, PE) 2 A-C S. monospora (Tabata et al. 11051, PE) 3 A-C S. trichophylla (Lu & Zhang 27625 - B, PE). A - Axillary leaves, B - Dorsal leaves, C - Ventral leaves. Scale bars: 0.2 mm.

Figure 10. Diversity strobili of Nepalese Selaginella species A S. laxistrobila (Nakaike 1319, PE) B S. bisulcata (Nakaike 3786, PE) C S. pennata (Nakaike 3507, PE) D S. chrysocaulos (Nakaike 1058, PE) E S. ciliaris (s. n. 1225, PE) F S. monospora (Tabata et al. 11051, PE) G S. trichophylla (Lu & Zhang 27625 - B, PE) H S. repanda (Nakaike 3708, PE) I S. vaginata (Nakaike 1102, PE). Scale bars: 2 mm (A, B), 2 mm (C, D, G, H), 1 mm (E, F, I).

Figure 29. Selaginella trichophylla K. H. Shing A Habit B strobilus, lower surface C fragment of the upper surface of the lateral branches D fragment of the lower surface of the lateral branches (Qinghai-Xizang Exped. 9451, holotype: PE).