Ctenitis vilis (Kunze) Ching

Family

Dryopteridaceae

Nomenclature

Ctenitis vilis (Kunze) Ching, Bull. Fan Mem. Inst. Biol. 8: 290. 1938; Holttum, Rev. Fl. Malaya ed. 1, 2: 496, f. 293. 1955 [‘1954’]; Tagawa & K.Iwats., Fl. Thailand 3: 358. 1988; Holttum, Fl. Males., Ser. II, Pterid. 2: 30. 1991; Boonkerd & Pollawatn, Pterid. Thailand: 201. 2000. – Aspidium vile Kunze, Bot. Zeit. 1846: 474. – Type: Zollinger 1602, Java (B?; iso BO, K, L, P).

Lastrea padangensis Bedd., Suppl. Ferns Brit. Ind.: 60. 1892.

Description

Adapted from Flora Malesiana and Flora of Thailand
Rhizome short, erect. Stipes to 20 cm long; basal scales light brown, to 10 by 0.5 mm, above base scales darker, 3–5 long, very narrow with inflexed margins. Laminae oblong-lanceolate, gradually narrowing from the broadest part at base towards acuminate apex, up to 25 by 10 cm, tripinnatifid at base; to 8 pairs of free pinnae; basal pinnae a little shorter than those next above, asymmetrically ovate-subdeltoid, commonly 7 cm long with basal basiscopic pinnule 3.5 x 1.4 cm, deeply lobed; middle pinnae with one pair of free deeply lobed pinnules, distal part of these pinnae lobed almost to the costa, lobes oblique, acute, middle ones entire; lower surface of costae of pinnae bearing very narrow scales; veins simple or forked. Sori medial on pinna lobes; indusia small, often obscure .

Distribution in Thailand

PENINSULAR: Ranong, Satun, Yala, Narathiwat.

Wider Distribution

Malesia.

Ecology

Terrestrial by large streams at sea level. This species is said to grow mostly in stream-beds and in such a habitat the pinnae and pinnules, or higher divisions of fronds if any, are usually placed obliquely (so-called rheophyte ).

Proposed IUCN Conservation Assessment

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

Notes

This species is said to grow mostly in stream-beds and in such a habitat the pinnae and pinnules, or higher divisions of fronds if any, are usually placed obliquely.

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