All Floras      Advanced Search
FOC Vol. 2-3 Page 373, 377, 380, 382, 385, 386 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 2-3 | Thelypteridaceae | Cyclosorus

27. Cyclosorus acuminatus (Houttuyn) Nakai in Thunberg, Misc. Pap. Japan. Pl. 15. 1935.

渐尖毛蕨 jian jian mao jue

Plants (20-)40-60(-80) cm tall. Rhizomes long creeping, apices including stipe bases with brown lanceolate scales. Fronds distant; stipes (10-)20-30(-40) cm, stramineous to brown; laminae (10-)30-50(-60) × 10-25 cm, bases not narrowed or slightly so, apices caudate to acuminate; lateral pinnae (5-)10-20 pairs, shortly stalked; middle pinnae linear-lanceolate to lanceolate, (5-)8-15(-18) × (0.5-)0.8-1.5(-2) cm, bases truncate or shallowly cordate, lobed 1/2-2/3 toward costae, apices acuminate to acute; segments (10-)15-30 pairs, 2-5 × 2-4 mm, basal acroscopic one (sometimes also basiscopic one) longer, sharply pointed or acute at apex; veinlets 6-10 pairs, simple (sometimes forked on basal acroscopic segment), proximal pair anastomosing, next (0.5-)1-1.5 pairs running to sinus membrane. Laminae papery to subleathery, grayish green when dried, both surfaces with short acicular hairs along costae and veins, also with minute hairs throughout. Sori orbicular, submarginal; indusia shortly hairy or subglabrous. Sporangia bearing reddish orange glands on stalks. Spores dark brown, densely cristate. 2n = 72, 108, 144, 216.

Semi-open places in thickets, grasslands, farmland margins, roadsides; near sea level to 1700 m. Anhui, Chongqing, Fujian, S Gansu, Guangdong, Guangxi, Guizhou, Hainan, Henan, Hubei, Hunan, Jiangsu, Jiangxi, S Shaanxi, Shandong, Sichuan, Taiwan, Yunnan, Zhejiang [Japan, Korea, Philippines].

Two forms have been recognized from Taiwan: Cyclosorus acuminatus f. ensipinnus (Hayata) H. Itô (Bot. Mag. (Tokyo) 51: 712. 1937; Dryopteris sophoroides (Thunberg) Kuntze f. ensipinna Hayata, Icon. Pl. Formosan. 4: 180-181. 1914) and C. acuminatus f. pilosus H. Itô (Bot. Mag. (Tokyo) 51: 712. 1937).

1 Proximal pinnae not shortened, acuminate at apices.   27a var. acuminatus
+ Proximal several pinna pairs slightly shortened, acute at apices.   27b var. kuliangensis

Lower Taxa


Flora of China @
Browse by
Advanced Search

Flora of China Home




 |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |