Volume 3 > Part 2 > Year 1989 > Page 168 > Davalliaceae > Humata

5. Humata heterophylla (Sm.) Desv.wfo-0001224953

Mém. Soc. Linn. Paris: 323. 1825; Bedd., Handb.: 46. 1883; Bonap., Notes Pteridol. 14: 53. 1923; E.Smith, J. Siam Soc. Nat. Hist. Suppl. 8: 2. 1929; Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 109; Holttum, Rev. Fl. Malaya 2: 366. f. 211. 1955.

Accepted Name : Davallia heterophylla Sm.
Mem. Acad. Sci. Turin. 5: 415. 1793.

Description : Rhizome long-creeping, about 1.5 mm diam., bearing dimorphic fronds remotely, glaucous, densely scaly; scales gradually narrowing from oblong base towards long tails, up to 6 by 0.7 mm, tails usually patent, brown to darker. Sterile frond: stipe 0.5–2.5 cm long, narrowly winged; lamina simple, oblong, acuminate at apex, round to cuneate at base, entire, 6–9 by 2–2.5 cm; coriaceous, naked; veins twice or thrice forked, all free. Fertile frond: stipe 1–2.5 cm long, winged; lamina linear-lanceolate, gradually narrowing towards both ends, up to 9 by 1 cm, lobed to half way; lobes patent, round, wavy. Sori terminal on veinlets, 3–5 for each lobe, a little inside the edges; indusia up to 1 mm long, 2 mm broad, brown, entire.

Thailand : PENINSULAR: Surat (Tha Ko, Ko Tao), Phangnga, Krabi (Ban Keng), Nakhon Si Thammarat (Tha Samet, Khao Luang), Narathiwat.

Distribution : Malesia throughout to the Pacific, north to Cochinchina.

Ecology : On branches of trees in dense forests.

Vernacular : Plai mon (ปลายมน)(Peninsular).

E-version notes : For more details see Ferns of Thailand, Laos and Cambodia.