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FOC | Family List | FOC Vol. 2-3 | Athyriaceae | Diplazium

39. Diplazium hirsutipes (Beddome) B. K. Nayar & S. Kaur, Companion Beddome?s Handb. Ferns Brit. India. 44. 1974.

篦齿双盖蕨 bi chi shuang gai jue

Diplazium stoliczkae Beddome var. hirsutipes Beddome, Handb. Ferns Brit. India, 182. 1883; Allantodia hirsutipes (Beddome) Ching; Asplenium thelypteroides Michaux; D. thelypteroides (Michaux) Beddome (1865), not (Michaux) C. Presl (1836).

Plants evergreen, medium-sized. Rhizome variable in habit, slender and creeping, ascending to erect, erect rhizome with stipe remains ca. 3 cm in diam., apex and stipe base densely scaly; scales black-brown, linear, ca. 1.5 cm, membranous, with black, narrow, sparsely toothed margin; fronds distant or approximate to caespitose. Fertile fronds up to 1 m; stipe brown at base, upward stramineous, 16-30 cm, 3-4 mm in diam., with linear brown scales throughout, upward scales gradually smaller and sparse, shallowly grooved adaxially; lamina 1-pinnate, broadly oblong-lanceolate, up to 50 × 25 cm at middle, apex acuminate; pinnae up to 25 pairs, contiguous, basal 1 or 2 pairs of pinnae slightly shortened, slightly reflexed, sessile, lanceolate, up to 14 × 2 cm at middle, base cuneate, pinnatifid, apex long acuminate; pinna lobes up to 22 pairs, slightly spreading or oblique, oblong, ca. 8 × 4 mm, margin serrate, sometimes entire, apex rounded; veins prominent, pinnate, veinlets ca. 7 pairs, simple, occasionally double, oblique. Lamina papery, brown, glabrous on both surfaces; rachis dark stramineous, grooved adaxially, rachis and costa abaxially with black or brown linear scales. Sori shortly linear, 1-5 pairs per each lobe, inframedial-subcostular, mostly simple, double on basal acroscopic veinlet; indusia brown, thickly membranous, entire, persistent. Spores bean-shaped, perispore hyaline and wide, few rugate.

Evergreen broad-leaved forests; 1800-2700 m. Xizang, Yunnan [Bhutan, India, N Myanmar, Nepal, Vietnam].

Diplazium hirsutipes has been treated as a variety of D. stoliczkae Beddome from NE India (Kyasya); the latter are large plants, with the pinnae 2.5-3.5 cm wide, basal pinnae longer than upper pinnae, stipe and rachis glabrous, and sori long, extending to margin.


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