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FOC | Family List | FOC Vol. 2-3 | Polypodiaceae | Loxogramme

10. Loxogramme porcata M. G. Price, Amer. Fern J. 80(1): 6. 1990.

拟内卷剑蕨 ni nei juan jian jue

Rhizome shortly creeping, densely scaly; scales grayish brown to dark brown, thin, linear-lanceolate, 5-10 × 0.5-1.2 mm, margin entire, apex acuminate; cells longer than wide. Fronds closely spaced, monomorphic; stipe indistinct, or very short and narrowly winged; lamina abaxially paler, adaxially deep green, narrowly elliptic to oblanceolate, 10-60 × 0.8-6 cm, thick and fleshy, curled up when dry, glabrous, base attenuate and decurrent onto stipe, apex long acuminate; costa raised abaxially, flat adaxially, straw-colored or pale green; veins hidden, anastomosing with free included veinlets. Sori linear, up to 6 cm, very oblique, well spaced, continuous from near costa to margin of frond, superficial; paraphyses many, dense, soft, longer than sporangia, completely covering sori at early stage. Spores ellipsoid-monolete.

Epiphytic on tree trunks in evergreen broad-leaved forests; 1200-1800 m. SE Xizang, S and W Yunnan [Bhutan, India, Myanmar, Nepal, N Thailand].

Loxogramme porcata is very similar to the sympatric L. involuta, since both develop abundant paraphyses, but they differ in their rhizome scales, which are 0.5-1.2 mm wide with elongated cells in L. porcata and paler in color, ca. 4 mm wide with ± isodiametric cells in L. involuta.


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