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FOC | Family List | FOC Vol. 2-3 | Dipteridaceae

2. Cheiropleuria C. Presl, Epimel. Bot. 189. 1851.

燕尾蕨属 yan wei jue shu

Plants evergreen, terrestrial or epilithic, medium-sized, Rhizome creeping or subscandent, protostelic, rarely branching, covered with long, uniseriate, pale brown, multicellular hairs; scales absent. Fronds dimorphic; stipes ± approximate, hairy at base only, non-articulate. Sterile lamina subleathery, entire or lobed, rarely to 4-lobed; main veins dichotomously forked with anadromous branching, smaller veins areolate with smaller areoles included in larger ones and numerous free included ultimate veinlets, all veins ± prominent; stomata paracytic. Fertile lamina simple, long, narrow, with 3 longitudinal main veins, abaxially almost wholly covered with sporangia. Sporangia of mixed maturation, intermingled with hairlike paraphyses with swollen terminal cell; spores ca. 128 per sporangium, trilete, tetrahedral, with prominent ridge near aperture, surface smooth to rugulose. x = 33.

Three species: from S Japan, China, and Indochina to E Malesia; two species in China.

1 Sterile lamina often deeply forked, or 2-forked into 3 lobes, or entire, angles of sinus 60?70? main veins 6-8 at base of lamina.   1 C. bicuspis
+ Sterile lamina often entire, rarely shallowly forked distally, angles of sinus 30?40? main veins 3 or 4 at base lamina.   2 C. integrifolia

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