Family

Polypodiaceae

Nomenclature

Selliguea pui Hovenkamp, Edinburgh J. Bot. 68: 265. 2011. – Crypsinus cruciformis auct. non (Ching) Tagawa: Tagawa & K.Iwats., Fl. Thailand 3: 559, f. 56.4–5. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 266. 2000. – Selliguea cruciformis auct. non (Ching) Fraser-Jenk.: Lindsay & Middleton, Edinburgh J. Bot. 66: 356. 2009.

Description

Rhizome long creeping, about 1–2 mm diam., densely scaly throughout; scales peltate, slightly spreading, light grey to pale brown, oblong with paler long tails, 4–5 by 1 mm, entire, dentate at apex. Stipes 1–4 cm long, stramineous, phyllopodia short, densely scaly, scales similar to those on rhizome. Laminae trilobed, or very rarely simple or 5- to 9-lobed, 5–15 by (2.2–)3.5–10.3 cm; the terminal lobes large, gradually narrowing from base to moderately acute apex, up to 8 by 2 cm; lateral lobes patent or slightly ascending, oblong or subdeltoid, rounded at apex, up to 5 by 1.7 cm, entire at margin; midrib raised on both surfaces; main veins, or often main branches of them also, dark on upper surface, raised on both surfaces, not straight, the other veins hardly visible, anastomosing; papyraceous, light green, paler beneath, glabrous. Sori one between adjacent main veins, in a single row at half-way between midrib and margin of lobes, in round or elliptic shallow cavities up to 2 mm diam., raised on upper surface.

Distribution in Thailand

NORTHERN: Chiang Mai, Chiang Rai, Uttaradit, Phitsanulok.

Wider Distribution

Endemic in Thailand.

Ecology

On mossy tree trunks in evergreen forests on ridges at high altitudes, rather rare.

Proposed IUCN Conservation Assessment

Least Concern (LC). Although endemic to Thailand this species is fairly widespread in the north, including in a number of protected areas, and not under any known threat.

Voucher specimens - Thailand

Palee 243, Chiang Mai (CMU); Middleton et al. 4873, Chiang Mai, Doi Suthep, near summit (E); Maxwell 97-1409, Chiang Rai (CMU); Norsaengsri & Intamusik 6222, Uttaradit (QBG); Suksathan 1704, Phitsanulok (QBG).