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FOC | Family List | FOC Vol. 2-3 | Thelypteridaceae | Cyclosorus

15. Cyclosorus procurrens (Mettenius) Copeland, Fern Fl. Philipp. 2: 340. 1960.

无腺毛蕨 wu xian mao jue

Aspidium procurrens Mettenius, Ann. Mus. Bot. Lugduno-Batavi 1: 231. 1864; Cyclosorus kweichowensis Ching ex K. H. Shing; C. laui Ching; Dryopteris procurrens (Mettenius) Kuntze; Nephrodium procurrens (Mettenius) Baker; Thelypteris procurrens (Mettenius) C. F. Reed.

Plants 35-100 cm tall. Rhizomes shortly creeping, including bases of stipes with sparse brown lanceolate scales. Fronds approximate; stipes 15-40 cm, brown at bases, distally dark stramineous; laminae 20-60 × 15-25 cm, bases not narrowed or slightly so, apices long acuminate; pinnae 15-25 pairs, sessile, proximal 1 or 2 pairs sometimes slightly shortened and reflexed; middle pinnae linear-lanceolate, 10-18 × 1.5-2 cm, bases truncate, lobed ca. 2/3 toward costae, apices long acuminate; segments 20-30 pairs on middle pinnae, subfalcate-oblong, 4-8 × 3-4 mm (basal acroscopic one longer), obtuse at apices; veinlets 6-10 pairs, proximal pair anastomosing, next 0.5-1 pairs running to sinus membrane. Laminae herbaceous to papery, yellowish green to brownish green when dried, with sparse short acicular hairs adaxially, abaxial surface with dense pale acicular hairs. Sori orbicular, medial; indusia densely hairy. Sporangia bearing reddish orange glands on stalks. Spores winged or otherwise ornamented.

Semi-open places by forest margins, thickets; 300-1400 m. Guangdong, Guangxi, S Guizhou, Hainan, Taiwan, S Yunnan [S India, Indonesia, Malaysia, Myanmar, Philippines].

Cyclosorus procurrens is quite similar to C. parasiticus and differs only in being eglandular on the pinnae. But there are many intermediate specimens. Holttum (Kew Bull. 31: 309. 1976) regarded C. procurrens as a synonym of C. parasiticus. This treatment seems reasonable but we cannot confirm it. Based on similar morphology, these two species probably belong to the same complex.


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