Huperzia miyoshiana (Mak.) Ching

Shoots erect, determinate, 12--18(--25) cm, clustered to long-decumbent, to 8 cm; leaves in mature portion smaller than leaves in juvenile portion; annual constrictions absent; juvenile growth sharply down-curled forming ± 1/2 circle, leaves at tip appressed to form pointed apex. Leaves in juvenile (proximal) portion spreading-reflexed (shade) to appressed-ascending (sun), in mature (distal) portion spreading-ascending (shade) to appressed-ascending (sun), light green to yellow, lustrous; leaves in juvenile portion narrowly lanceolate, parallel-sided, 4.5--7 mm; leaves in mature portion triangular, widest at base, 3.5--5.5 mm; margins entire; stomates present on both surfaces, numerous, 35--80 per 1/2 leaf on adaxial surface. Gemmiferous branchlets produced in 2--3 pseudowhorls at end of annual growth; gemmae 3.5--5 X 3--4 mm, lateral leaves 1.25--1.75 mm wide, acute with acuminate tip. Spores 25--34 µm.

B.C., Nfld.; Alaska, Wash.; Asia in Japan, Korea, Siberia.

On rock or terrestrial on moss-covered boulders in talus slopes, cliffs, near waterfalls, marshes in conifer forest; 0--1600(--1800)m.

Lycopodium miyoshianum Makino, Bot. Mag. (Tokyo) 12: 36. 1898; L. selago Linnaeus subsp. miyoshianum (Makino) Calder & Roy L. Taylor; L. selago Linnaeus var. miyoshianum (Makino) Makino; L. tenuifolium Herter; Urostachys miyoshiana (Makino) Nessel

Huperzia miyoshiana là một loài thực vật có mạch trong Họ Thạch tùng. Loài này được (Makino) Ching mô tả khoa học đầu tiên năm 1981.

东北石杉（学名：Huperzia miyoshiana）为石杉科石杉属下的一个种。