Diplazium petelotii Tardieu
Diplazium petelotii Tardieu, Asplen. Tonkin: 66, pl. 8, 3–5. 1932; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 259. 1940; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 116. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 463. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 194. 2000; Newman et al., Checkl. Vasc. Pl. Lao PDR: 33. 2007.
Unclear whether erect or creeping rhizome; scales narrow, up to 13 by 1 mm, bicolored, brown with a darker margin, minutely toothed. Stipes 28.5–50 cm long, stramineous to brownish. Frond broadly oblong, about 60 by 45 cm, widest at lower 1/3, bipinnate, 10–12 pairs of pinnae; lower second or third pinnae largest, stalked up to 2.5 cm long, narrowly oblong, gradually narrowing towards acuminate apex, falcate, up to 27.5 by 12.5 cm; the basal pinnae smaller with smaller basal pinnules, upper pinnae gradually becoming smaller upwards; larger pinnules sessile or adnate at base, oblong with acuminate apex and broadly cuneate to subtruncate base, falcate, serrate at margin, up to 5 by 1.5 cm; papyraceous, green; costules hardly raised below, veins pinnate with simple veinlets. Sori linear , about 8 mm long, often diplazioid.
Distribution in Thailand
NORTHERN: Chiang Rai, Phitsanulok.
Distribution in Laos
S China, N Vietnam.
On mountain slopes in dense evergreen forests at medium to high altitudes.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is reasonably widespread and not under any known threat.
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