形態特徵

• Main stems creeping to semi-erect, glabrous, angular.
• Leaves dimorphic, those of the lower plane unequal-sided, ovate, minutely ciliate, obtuse or acute at apex, pointing outwards; those of the upper plane nearly equal-sided, narrowly ovate to lanceolate, ciliate, acuminate-aristate at apex, pointing upwards; axillary leaves narrowly ovate, entire, acute at apex, equal-sided. Strobili borne on ends of leafy branches, 5-10 mm long; sporophylls dimorphic, those of the upper plane unequal-sided, lanceolate, minutely ciliate, acute at apex, those of the lower plane nearly equal-sided, ovate, ciliate, acuminate at apex.
• Megaspores pale yellow, microsperes orange-yellow.

分布

• 台灣 : Growing in the montane forests.
• 世界 : China, Vietnam, Indo-China, Japan and the Ryukyus.

引證標本

NANTOU: Kuantaochi, Huang & Kao 6153; Chingshueikou, Huang 931. KAOHSIUNG: Laolong, Shieh & Chen 37. TAITUNG: Chihpeng, Shieh 1485. HUALIEN: Kueiling, Shieh & Chen 686.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 50. 1994.  (Fl. Taiwan 2nd edit.)