Huperzia serrata var. serrata f. serrata("Hosobatogeshiba")
Japanese name: ホソバトウゲシバ（細葉峠芝） Scientific name:Huperzia serrata var. serrata f. serrata
[Overview]
An evergreen terrestrial fern 7–20 cm tall, found in forests in the mountains.
The stem branches in forks; near the ground it is short and ascending, and the upper part is erect.
There are sporophylls and trophophylls, but they are almost the same shape, the sporophylls being slightly smaller than the trophophylls.
The leaves are narrowly lanceolate to oblanceolate, 0.8–1.5 cm long, with pointed tips, slightly glossy yellowish green to deep green, and papery to thinly leathery; the width, at the part slightly above the middle where the leaf is broadest, is 0.2 cm or less.
The leaf base gradually narrows, and there is no leaf stalk.
The leaf margin has irregular teeth.
There is no sporangial spike; the sporangia are borne singly in the axils of the sporophylls, and are kidney-shaped like a bivalve shell, stalkless and cream-colored.
Bulbils form near the stem tip, and these also serve for propagation.
