Coniogramme petelotii Tardieu


Pteridaceae, subfamily Cryptogrammoideae


Coniogramme petelotii Tardieu, Bull. Mus. Natl. Hist. Nat., sér. 2, 5: 334. 1933; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 192, f. 22, 1–2. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 107. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 189. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 122. 2000.


Rhizome creeping, up to 8 mm in diam., the apex covered with scales; scales linear, with long tails, 5–7 mm long, entire, glabrous, concolorously brown. Stipes stramineous, a little swollen at scaly base, minutely scaly upwards, 50–75 cm long, grooved on adaxial surface of the upper portion. Laminae oblong-oval, to 45 by 30 cm, simply imparipinnate with a few lateral pinnae; rachis scaly, grooved on upper surface; lateral pinnae 2 or 3 pairs, shortly stalked, oblong-lanceolate, falcate, acuminate at apex, cuneate to round at base, entire at margin, up to 25 by 8 cm; apical pinna like the lateral ones, a little larger, cuneate at base; costa distinctly raised on lower surface, shallowly grooved on upper surface, with minute scales; veins parallel, once or twice forked, very rarely reticulate, more or less distinct on upper surface, hydathodes about 1 mm from cartilaginous margin; herbaceous to a little fleshy, green on upper surface, paler beneath, glabrous. Sporangia along veins, from costa to 3/4 to 5/6 way to margin .

Distribution in Thailand

NORTHERN: Chiang Mai.

Wider Distribution

Yunnan and N Vietnam.


On wet sandy ground by streams in lower montane forests at about 1600 m alt.

Proposed IUCN Conservation Assessment

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

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