Roots 15 or fewer, yellow to brown, 0.5–2 mm diam. 1cm from base. Plants over 12 cm. Common stalk lacking idioblasts (elongate, spindle-shaped cells in vascular strand). Trophophore sessile and erect, arising from middle to distal portion of common stalk well above ground level; blade usually 1 per plant, seasonal, absent during winter, deltate, 3–4-pinnate, 5–25 cm wide when mature, thin, herbaceous. Leaf primordia densely hairy, hairs 1.5–2mm. Leaf-sheath open. Pinna divisions reduced in size to tip. First pinnule on basal pinnae usually borne acroscopically. Sporophores long-stalked, arising from middle to distal portion of common stalk well above ground level, commonly absent due to abortion in early development or seasonal, stalks only slightly flattened, not fleshy, 0.5–0.8mm wide. x =92.

Distribution

Worldwide

Discussion

Species 2–3 (1 in the flora).

Selected References

None.

Lower Taxa

Botrychium virginianum

No values specified.