巨型毛蕨 ju xing mao jue

Nephrodium subelatum Baker, Bull. Misc. Inform. Kew 1906: 11. 1906; Christella subelata (Baker) Holttum; Dryopteris subelata (Baker) C. Christensen; Thelypteris subelata (Baker) K. Iwatsuki.

Plants 0.6-1.5 m tall. Rhizomes shortly or long creeping, massive and woody, including stipe bases with dark brown lanceolate scales. Fronds approximate or distant; stipes 10-30 cm, bases dark brown, stramineous distally; laminae 50-120 × 30-40 cm, bases narrowed, apices caudate; pinnae 15-30 pairs, shortly stalked or almost sessile, proximal 2-10 pairs gradually shortened and narrowed, proximal pair ca. 1 cm; middle pinnae lanceolate, 10-20 × 2-3.5 cm, bases rounded-truncate, lobed 1/4-1/3 toward costae, apices long acuminate; segments 20-35 pairs on middle pinnae, oblong, 2-5 × 3-5 mm, entire, obtuse to subacute at apices; veinlets 8-12 pairs, proximal 1 or 2 pairs anastomosing, next 1-3 pairs running to sinus membrane. Laminae papery, brownish green when dried, with short acicular hairs along costae and veins on both surfaces, also with clavate glands along veins and also minute hairs between veins abaxially. Sori orbicular, medial or supramedial; indusia shortly hairy. Sporangia bearing orange to golden clavate glands on stalks. Spores with medium-sized to long fimbriate wings.

Wet places in forests, semi-open forest margins; 200-1500 m. Guangxi, S Yunnan [India, Laos, Myanmar, N Thailand].

The type of Cyclosorus elatus Ching ex K. H. Shing (FRPS 4(1): 342. 1999), not (Mettenius ex Kuhn) Alston (1956), has features intermediate between C. subelatus and C. dentatus. Only one gathering (the type) with mostly sterile sori has been collected. This taxon might be a hybrid.