Family

Dryopteridaceae

Nomenclature

Lomagramma sorbifolia (Willd.) Ching, Lingn. Sci. J. 12: 566. 1933. – Aspidium sorbifolium Willd., Sp. Pl. 5: 23. 1810. – Nephrodium sorbifolium (Willd.) C.Presl, Rel. Haenk.: 31. 1825.

Lomagramma matthewii (Ching) Holttum, Gard. Bull. Straits Settlem. 9: 206. 1937; Tardieu & C.Chr., Fl. Indo-China 7(2); 430. 1941. – Campium matthewii Ching, Bull. Fan Mem. Inst. Biol. 1: 158, f. 3. 1930.

Lomagramma grossoserrata Holttum, Gard. Bull. Straits Settlem. 9: 203, pl. 10 & 11. 1937; Tagawa & K.Iwats., Fl. Thailand 3: 325. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 187. 2000.

Description

Rhizome long creeping or climbing, naked but scaly at apex; scales peltate, lanceolate, brown, rather small. Sterile fronds of two kinds: bathyphylls (young fronds) and acrophylls (mature fronds).  Bathyphyll: stipe 7–8 cm long, stramineous, blackish and sparsely scaly at base; lamina 35–40 cm long, up to 10 cm wide, oblong-lanceolate with acute apex; pinnae 24–25 pairs, sessile, ascending, the base unequally cuneate, subentire, up to 10 cm long; membranous. Acrophyll: stipe 30 cm long; pinnae sessile, asymmetrically cuneate at base, serrate at margin, up to 18 by 1.5–2 cm; herbaceous; venation with 3 rows of areoles, without free included veinlets. Fertile frond pinnate; pinnae linear; sporangia covering the whole lower surface of pinna except midrib .

Distribution in Thailand

NORTHERN: Phrae.

Distribution in Laos

Luang Namtha.

Wider Distribution

NE India, Burma, Southern China, Vietnam.

Ecology

Climbing at 620–880 m alt.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread outside of Thailand and not under any known threat.