形態特徵

• Main stems densely tufted, stout and short, made up of many leafy branches of nearly equal length, curling up when dry; basal part of stems covered with many roots.
• Leaves all much alike, the lateral and median leaves only slightly different, arranged in four rows, unequal-sided, ovate, ciliate, cuspidate at apex,margined, dark green on upper side, pale green beneath, narrowed at base, not auricled.
• Strobili borne on ends of leafy branches, 4-angled; sporophylls monomorphic, ovate, ciliate, acuminate at apex, keeled. Microspores reddish-brown, usually borne in long strobili; megaspores yellow, usually in very short strobili.

分布

• 台灣 : Usually growing on exposed rocks or hillsides.
• 世界 : China, India, Eastern Siberia, Korea, Japan, the Ryukyus, the Philippines, Java, and Celebes.

引證標本

TAIPEI: Wulai, DeVol 7029. ILAN: Simopaiwan, Suzuki 6782. TAICHUNG: Pahsienshan, Huang 1287. NANTOU: Meiyuan, Suzuki 5715; Kuantaochi, Shieh & Tsai 10371*. CHIAYI: Funchihu, Tsai 15266. KAOHSIUNG: Chiweishan, Sasaki s. n. 1915. PINGTUNG: Tashuling, Masamune 1581. TAITUNG: Taitungshan, Yamamoto 157; Is. Lanyu, Sata s. n. 1933. HUALIEN: Tienhsiang, Kao 7826; Kueilin, Shieh & Chen 599.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG. 1994. Flora of Taiwan, second edition 1: 56. (Fl. Taiwan 2nd edit.)