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

26. Diplazium multicaudatum (Wallich ex C. B. Clarke) Z. R. He
[comb. nov.]

假密果双盖蕨 jia mi guo shuang gai jue

Basionym: Asplenium multicaudatum Wallich ex C. B. Clarke, Trans. Linn. Soc. London, Bot. 1: 502. 1880; Allantodia multicaudata (Wallich ex C. B. Clarke) W. M. Chu; Asplenium schimperi (Mougeot ex Fée) A. Braun var. multicaudatum Baker; Athyrium multicaudatum (Wallich ex C. B. Clarke) C. Presl; A. umbrosum (Aiton) C. Presl var. multicaudatum (Wallich ex C. B. Clarke) Beddome; Diplazium umbrosum (J. Smith) Beddome var. multicaudatum (Wallich ex C. B. Clarke) Beddome.

Plants evergreen, medium-sized to large. Rhizome creeping to ascending, occasionally slender and creeping, apex and stipe base densely scaly; scales loose, brown or red-brown, lanceolate or linear-lanceolate, up to 1 cm, subentire; fronds caespitose or subapproximate, rarely sparse. Fertile fronds up to 1.5 m; stipe dirty-brown at base, stramineous when dry, 30-60 cm, 3-5 mm in diam. at base; lamina 2-pinnate with pinnatipartite pinnules, ovate, up to 80 × 60 cm, apex acuminate; pinnae 10-12 pairs, alternate, ascending, nearly symmetrical; lower pinnae broadly lanceolate, up to 40 × 20 cm, with stalk up to 4 cm, 1-pinnate, acuminate at apex; upper pinnae lanceolate, gradually reduced, pinnatipartite or pinnatisect, sessile or subsessile; pinnules up to 15 pairs, alternate, subspreading, lanceolate, up to 13 × 4 cm, base broadly cuneate or shallowly cordate, sessile or shortly stalked, pinnatilobate to pinnatipartite, apex acuminate or shortly caudate; pinnule lobes up to 15 pairs, slightly ascending, contiguous, sickle-shaped oblong, margin dentate, apex rounded; veins pinnate, veinlets up to 9 pairs per lobe, usually forked or simple, ascending. Lamina herbaceous or thinly herbaceous when dry, green, glabrous on both surfaces; rachis and costa stramineous. Sori oblong, costular, up to 6 pairs per lobe, usually single or double; indusia brown, membranous, entire, when single opening acroscopically. Spores reniform, perispore with few rugate, granular ornamentation.

Wet evergreen broad-leaved tropical and subtropical forests; 600-1500 m. SE and W Yunnan [India, Myanmar, Nepal].

Diplazium multicaudatum is similar to D. spectabile and is often treated as conspecific. Diplazium multicaudatum differs in the rhizome and base of stipe with loose, lanceolate or linear-lanceolate scales and indusia opening acroscopically, while in D. spectabile the scales at stipe base are adpressed, sparse, ovate, and the indusia irregularly rupture on the back.


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