Family

Dryopteridaceae

Nomenclature

Bolbitis virens (Wall. ex Hook. & Grev.) var. compacta Hennipman, Blumea 18: 149. 1970; Hennipman, Leiden Bot. Ser. 2: 184, f. 47 & 48i–j. 1977; Hennipman, Fl. Males., Ser. II, Pterid. 1: 321, f. 25a–c. 1978; Tagawa & K.Iwats., Fl. Thailand 3: 316. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 185. 2000.

Description

For the species :

Terrestrial or lithophytic. Rhizome short creeping, thick, densely scaly; scales thin but firm, dark brown, clathrate, up to 8 by 1.5 mm. Sterile frond: stipe 30–40 cm long, densely scaly throughout, scales on upper portion light brown, ferrugineous, appressed, irregular in shape; lamina oblong-ovate to oblong, 35–60 by about 30 cm; lateral pinnae 5–7 pairs, stalked, straight, ascending or patent in lower ones, oblong to oblong-lanceolate, caudate at apex, narrowly cuneate or unequally rounded at base, up to 25 by 6 cm, toothed at margin, more or less waved; costa minutely scaly beneath, veins slightly raised on undersurface, reticulate with a few included veinlets in each areole; subcoriaceous, glabrous, green both in living and dried condition, terminal pinna like lateral ones or slightly larger, with a bulbil near the apex. Fertile frond nearly as high as the sterile ones: stipe up to 55 cm long; lamina up to 40 by 20 cm; pinnae 4–6 pairs, linear, acuminate at apex, stalked, up to 20 by 2 cm; sporangia dispersed on the whole undersurface of pinnae .

For the variety :

Different from the type variety in: pinnae of fertile frond broader, 4–9 by 0.8–2 cm, about 3–7 times as long as wide.

Distribution in Thailand

SOUTH-EASTERN: Chanthaburi; PENINSULAR: Phangnga, Trang.

Wider Distribution

Peninsular Malaysia, S Vietnam.

Ecology

Moist ground by streams in dense evergreen forests at low altitude less than 300 m alt.

Proposed IUCN Conservation Assessment

Least Concern (LC). This variety is widespread and not under any known threats.

Voucher specimens - Thailand

Middleton et al. 4660, Chanthaburi, Namtok Phlio National Park (E).