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2b. Cyclosorus truncatus var. angustipinnus Ching, Bull. Fan Mem. Inst. Biol., Bot. 8: 218. 1938.
线羽截裂毛蕨 xian yu jie lie mao jue
Cyclosorus angustipinnus (Ching) K. H. Shing.
Plants 0.6-1 m tall. Middle pinnae 12-18 × 1-1.5 cm, lobed to 1/3 toward costae; veinlets 4-6 pairs per segment, proximal pair anastomosing, next pair running to sinus membrane.
● Wet places in forests; 400-600 m. Hainan.
Compared with the typical variety, Cyclosorus truncatus var. angustipinnus has a smaller laminar outline, narrower pinnae, and fewer anastomosing veinlets. According to Holttum (Blumea 21(2): 314. 1973), it might be a diploid.
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