Selaginella chrysorrhizos Spring, 1850

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 chrysorrhizos Spring Figs 7 (3 A–C), 11A , 32

Selaginella chrysorrhizos Spring, Monogr. Lycop. 2: 251, no. 189. 1850, p. p.; Iwatsuki 1975; Dixit 1992; Thapa 2002; Fraser-Jenkins et al. 2015; Fraser-Jenkins et al. 2017. Type. (lectotype, designated by Fraser-Jenkins et al. 2017) Assam, Griffith 141 (K).

= Selaginella panchghaniana R.D. Dixit, Bull. Bot. Surv. India 25(1-4): 226, t. 1, f. 3. 1985; Dixit 1992. Type. INDIA. Maharashtra-Mahabaleshwar: Panchghani, 7 Nov 1966, Panigrahi 11739 (holotype: BSA).

Description.

Stems 8-12 cm, evergreen or seasonally green, suberect. Rhizophores restricted to base of stem. Main stems branched from near base or from lower part upward, in basal part main stem 0.5-1.1 mm in diam. Stems glabrous, glossy yellow, sulcate, primary leafy branches 5-8 pairs, forked or once or twice pinnately branched. Axillary leaves ovate-oblong, 1.0-2.0 × 0.5-0.8 in base slightly cuneate, margin denticulate, apex obtuse. Ventral leaves ovate-oblong, 0.6-0.8 × 1-2 mm, ascending, acroscopic base ovate-oblong, slightly dilated, imbricate, distantly rotundate at the base, margin denticulate, basiscopic base, entire, except apices, apex obtuse. Dorsal leaves ovate, 1.8-2 × 0.5-0.8 mm, subfalcate, margin denticulate, apex shortly cuspidate. Strobili solitary, terminal, compact, 3-7 × 1.5-2 mm. Sporophylls dimorphic, ventral sporophylls ovate, aristate, margin ciliate; dorsal sporophylls oblong, obtuse, margin ciliate-dentate. Megaspores dark-brown, surface verrucate; microspores pale-brown, surface verrucate.

Ecology.

On banks and on large stones. Alt. 200-2000 m.

Distribution in Nepal.

W, C, E.

Nepalese threatened status: not available data.

General distribution.

BANGLADESH, BHUTAN, INDIA (Assam, Kerala, Madhya Pradesh, Manipur, Meghalaya, Mizoram, Sikkim, West Bengal), LAOS, MYANMAR, THAILAND, VIETNAM.

Chromosome number.

Not available data.

Selected specimens examined:

C Nepal: KASKI: "Bhoot Bridge, between Butwal and Pokhara, alt. c. 300 m, 9 Nov 1988, T. Nakaike 3723 " (PE).

MAKAWANPUR: "Pisulin [Fishling], near Muglin, Gorkha [Makawanpur District], alt. c. 300 m, 12 Nov 1988, T. Nakaike 3831 " (PE).

E Nepal: SOLUKHUMBHU: "between Junbesi and Rachowa, Solukumbu, alt. 2600-3400 m, 12 Dec 1988, T. Nakaike 3304 " (PE).

SANKHUWASABHA: Simbu, 27°22'N, 87°47'E, alt. 1800 m, 5 Dec 1971, J.F. Dobremez DBR NEP 1335 " (E00754784); "Sunaturi, W. of Hetauda, Makawanpur, alt. c. 200 m, 8 Nov 1988, T. Nakaike 3702 " (PE); " l.c. 3698 " (PE); "l.c. 3720 " (PE); "l.c. 3706 " (PE); "Simbu, 27°22'N, 87°47'E, alt. 2000 m, 5 Dec 1971, J.F. Dobremez DBR NEP 1333 " (E00670601, E00754800); "Simbu, 27°22'N, 87°47'E, alt. 1800 m, 5 Oct 1971, J.F. Dobremez DBR NEP 1335 " (E00670602).

Figures

Figure 7. Morphological diversity of the leaves of Nepalese Sealginella species 1 A-C S. repanda (Nakaike 3708, PE) 2 A-C S. vaginata (Nakaike 1102, PE) 3 A-C S. chrysorrhizos (Nakaike 3708, PE). A - Axillary leaves, B - Dorsal leaves, C - Ventral leaves. Scale bars: 0.2 mm.

Figure 11. Diversity strobili of Nepalese Selaginella species A S. chrysorrhizos (Nakaike 3708, PE) B S. reticulata (Nakaike 1760, PE) C S. subdiaphana (Zhang 5, PE) D S. tenuifolia (PE-Xizang Exped. PE 6280, PE). Scale bars: 1 mm (A, D), 2 mm (B, C).

Figure 32. Selaginella reticulata (Hook. & Grev.) Spring A (A 1) Habit, lower surface B strobilus, lower surface C fragment of the lower surface of the lateral branches D fragment of the upper surface of the lateral branches (T. Nakaike 1760, PE).