Bolbitis virens (Wall. ex Hook. & Grev.) var. compacta Hennipman
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.
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 :
Distribution in Thailand
SOUTH-EASTERN: Chanthaburi; PENINSULAR: Phangnga, Trang.
Peninsular Malaysia, S Vietnam.
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).
Habit (Bolbitis virens var. compacta is the taller plant)
Sterile and fertile fronds
Upper surface of sterile pinna
Upper surface of fertile pinna
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