taxonID	type	description	language	source
981287FBFF9E8361FD6D8BFE4F548F18.taxon	description	Perennial herbs, c. 3 cm tall. Rhizome vertical, ovoid, brown outside, pale yellow inside, lightly fragrant, c. 2.5 × 1.5 cm, with several fibrous roots bearing tubers. Cataphylls 2 – 3, lanceolate, apex acuminate, dark reddish-brown, green at base, 1 – 3 cm long, hairy. Leaves 2, sessile, flat or horizontal on the ground; sheaths 2.5 – 3 cm long, green or green with reddish-brown, hairy; ligule membranous, 1 – 3 × c. 10 mm, bi-lobed with rounded apex, sparsely hairy; lamina orbicular to sub-orbicular, 12 – 16 (– 18) × 11.5 – 14 (– 16) cm, base cuneate or sub-cordate, apex acute, margins entire, widely undulate with dark reddish-brown along the margins, upper surface black or black with light grey markings, sparsely hairy (mostly at the midribbase), obviously embossed veins, lower surface grey-green with reddish-brown, veins hairy. Inflorescence enclosed by two cataphylls; peduncles less than 1.4 cm long, white with light pale green at tip, glabrous. Bracts lanceolate, 2.8 – 3.3 × 1.1 – 1.7 cm, mucronate to acute at apex, green with brownish green at tip and pale green at base, hairy. Bracteoles lanceolate, 11.5 – 12.3 × c. 4 mm, translucent white, bi-lobed; lobes 5 – 6 mm, acuminate at apex, sparsely hairy. Flowers 24 – 27. Calyx tubular, translucent white, c. 2.3 cm long, with one deep incision c. 6 mm, apex acute, hairy. Corolla tube white, c. 3.5 cm long; dorsal lobe lanceolate, white, c. 1.5 × 0.32 cm, apex little hooded, acuminate; lateral lobes lanceolate, white, c. 1.3 × 0.35 cm, apex little hooded, acuminate, glabrous. Staminodes 2, broadly obovate, obtuse at apex, c. 1.9 × 1.5 cm, light purple above with white spot at base, white below, glabrous. Labellum light purple above with a white spot at base, white below, deeply divided to the edge of white spot; lobes obovate, c. 1.75 × 1.4 cm, apex rounded. Stamens sessile, white, glabrous; anthers c. 3.2 mm long; anther - crest triangular and bend to the back, c. 1.3 × 1 mm, lower than the plane of the petals, acuminate at apex, white, glabrous. Ovary spheroid, 3.5 – 4 × c. 2.5 mm, densely hairy; style filiform, c. 4 cm long, slender, white; stigma obconic, c. 1 × 0.8 mm, creamy white, 2 - lipped, lips equal, ciliate, cilia c. 0.4 mm long; epigynous glands 2, c. 3 mm long, slender, white. Capsules sub-globose to prolate spheroid, c. 1.2 × 1 cm, densely hairy, light purple with purple veins, brown when old; seeds c. 3 × 2 mm, brown with white arils. Vernacular name: ‘ Nillakan ’ in Thai language, refers to its black leaves. Flowering & fruiting: Flowering from late May to September and fruiting from August to late October. Habitat: Occurring at elevations of 70 – 185 meters above sea level, growing in sandy loam soil, moist and close to the watercourse in a deciduous forest. Etymology: The specific epithet ‘ nigrifolia ’ is derived from two Latin words; ‘ nigrum ’ meaning ‘ black ’ and ‘ folia ’ meaning ‘ leaves ’ referring to its black leaves. Distribution: Hitherto endemic to Central Thailand (Fig. 3).	en	T., Boonma, S., Saensouk, Saensouk, P. (2021): Kaempferia nigrifolia (Zingiberaceae), a new species from Central Thailand. Rheedea 31 (1): 11-17, DOI: 10.22244/rheedea.2021.31.01.02, URL: https://doi.org/10.22244/rheedea.2021.31.01.02
