Selaginella adunca A. Braun ex Hieron.

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 adunca A. Braun ex Hieron. Figs 2 (1 A–C), 15

Selaginella adunca A. Braun ex Hieron., in Engl. and Prantl, Nat. Pflanzenfam. 1(4): 674. 1901; Dixit 1992; Fraser-Jenkins et al. 2015; Fraser-Jenkins et al. 2017. Type. INDIA. Falconer 34 et 1230 p.p. (syntypes: B).

Description.

Stems 10-25 cm, erect. Rhizophores restricted in basal part of stems, located on ventral side. Main stems branched from middle upward, decumbent, simple in basal region, branches decompound, close together, flabellate, in basal part main stem 1.2-1.5 mm in diam. Main stems terete, bright and sometimes stramineous-red. Axillary leaves symmetrical, oblong, base exauriculate, margin ciliolate. Ventral leaves asymmetrical, oblong, 0.9-1.4 × 0.6-1 mm, subfalcate, acroscopic base dilated, ciliate at base, rest dentate to denticulate above, apex cuspidate. Dorsal leaves small, elliptic, 0.7-1.2 × 0.4-0.8 mm, base cuneate truncate, margin dentate, apex cuspidate. Strobili solitary, terminal, compact, tetrahedral, 3.0-5.0 × 1.0-2.2 mm, slightly wider branches. Sporophylls monomorphic, deltoid, cuspidate, margin dentate, strongly keeled. Megaspores reddish-brown, surface verrucate; microspores orange, surface verrucate

Ecology.

Terrestrial or epilithic, xerophytic, on open semi-dry stony areas. Alt. 330-2500 m.

Distribution in Nepal.

W.

Nepalese threatened status: NT ( Fraser-Jenkins et al. 2015). Endemic NW Himalaya, rare.

General distribution.

INDIA (Uttarakhand, Himachal Pradesh).

Chromosome number.

not available data.

Selected specimens examined:

W Nepal: KALIKOT: "Between Kairkot and Lapha, Karnali Valley, crevices of dry cliff., alt. 4500 ft, 26 Apr 1952, O. Polunin, W.R. Sykes & L.H.J. Williams 3984 " (E, photo; US, photo; KYO, photo); "Kiurithanu, Karnali River, growing on vertical rocks, alt. 4000 ft, 21 Apr 1952, O. Polunin, W.R. Sykes & L.H.J. Williams 797 " (E, photo; US, photo; KYO, photo).

DOLPA: "Between Phulchangi and Chong, near Tibrikot, growing among stones on dry hot open slopes, alt. 8000 ft, 11 Nov 1952, O. Polunin, W.R. Sykes & L.H.J. Williams 3323 " (AAU; E, photo; US, photo; KYO, photo).

DANG: "Between Kurpani and Ghorai, growing on damp sheltered earth banks, alt. 4000 ft, 4 Sep 1952, O. Polunin, W.R. Sykes & L.H.J. Williams 1332 " (E, photo);

SURKHET: "Near Kuepani Siwalik Hills, alt. 1000 ft, 27 Oct 1952, O. Polunin, W.R. Sykes & L.H.J. Williams 5920 " (E, photo).

KALIKOT: "Taelou, 28°53'N, 82°30'E, 1100 m, 22 Apr 1984, J.F. Dobremez DBR NEP 2689 " (E00670605); "Bodi Khola, 1700 m, 25 Apr 1974, J.F. Dobremez DBR NEP s.n." (E00670564).

Figures

Figure 2. Morphological diversity of the leaves of Nepalese Sealginella species 1 A-C S. adunca (Strachey & Winterbottom 5, PE) 2 A-C S. fulcrata (Nakaike 1923, PE) 3 A-C S. involvens (Zhang 345, PE). A - Axillary leaves, B - Dorsal leaves, C - Ventral leaves. Scale bars: 0.2 mm.

Figure 15. Selaginella adunca A. Braun ex Hieron. A Habit B, C fragment of the upper surface of the lateral branches showing imbricate at branch apices (A) and medial part lateral branches (B) D fragment of the main stem showing shape of leaves (J. F. Dobremez DBR NEP 2689, E). Link: (http: // data. rbge. org. uk / herb / E 00670605).