Asplenium yoshinagae Makino
Asplenium yoshinagae Makino, Phan. Pterid. Jap. Icon. 1: pl. 64. 1900; K.Iwats., Acta Phytotax. Geobot. 26: 172. 1975; Tagawa & K.Iwats., Fl. Thailand 3: 285, f. 23.1. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 179. 2000.
Asplenium planicaule Wall. ex Mett., Abh. Senckenberg. Naturf. Ges. 3: 201. 1859, non Lowe 1858: C.Chr., Contr. U.S. Natl. Herb. 26: 332. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 231. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 87. 1967.
Asplenium indicum Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 3: 264. 1965.
Epiphytic. Rhizome short, erect, scaly; scales dark brown to nearly black, narrow, subulate, entire, up to 5 by 0.5 mm. Stipes usually up to 15 cm long, dark green to brownish, not polished, sparsely scaly. Laminae narrowly lanceolate, commonly about 20 by 5 cm, sometimes up to 40 by 8 cm, acute to acuminate at apex, pinnate; rachis like the upper part of stipe, rarely bulbils at bases of first acroscopic pinnules and on rachis near frond apex; pinnae 12–25 pairs, stalked, dimidiate, rhomboid, acute at apex, broadly cuneate and auricled at acroscopic base, narrowly cuneate and entire at basiscopic base, margin irregularly lobed with dentate margin, 2–4 by 0.7–1.5 cm, chartaceous, deep green, brownish in dried specimens. Sori elongate, many near the costa, indusia entire .
Distribution in Thailand
NORTHERN: Chiang Mai, Chiang Rai, Nan, Lamphun, Tak; NORTH-EASTERN: Phetchabun, Loei, Khon Kaen; SOUTH-WESTERN: Phetchaburi, CENTRAL: Saraburi; PENINSULAR: Surat Thani.
Distribution in Laos
Sri Lanka, N. & S India, Burma, S China, Indochina, Taiwan, Philippines, north to Japan.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and common and not under any known threats.
Voucher specimens - Thailand
Middleton et al. 4883, Chiang Mai, Doi Inthanon National Park (E); Middleton et al. 5002, Chiang Mai, Doi Chiang Dao Wildlife Sanctuary (E); Middleton et al. 5164, Loei, Phu Luang Wildlife Sanctuary (E).
Transverse section through rhizome
Pinnae from beneath
Upper surface of pinnae
Lower surface of pinnae and sori
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