7. Hapaline colaniae Gagnep.

in Notul. Syst. 134 (1941) & in Fl. G³n. l'Indo-Chine 6: 1132 (1942). Type: Vietnam, Ha bac, Colani 2919 (holotype P!; isotypes K (photo!), P!, NSW, SGN!, US).

Rather robust, deciduous perennial herb up to 32 cm tall. Stem: tuber cylindric, 1 x 3 cm, rhizomatous in appearance; stolon unknown. Roots c. 0.25 mm in diam. Leaf: prophyll linear-triangular to oblong-triangular, up to 5 cm x 7 mm, acute; cataphyll linear-triangular, up to 7.5 cm x 9 mm, acute; petiole 25 - 27.5 cm x 2 - 3 mm; leaf blade hastate, junction of anterior lobe with posterior lobes strongly constricted, 13.3 - 23.5 x 5.5 - 9.4 cm, thin-textured, dark green, heavily marked with diffuse pale green and silver-grey patches, margins smooth, apex acuminate to subacuminate, posterior lobes acute to subacuminate, strongly divergent. Inflorescence: 1 - several together, emerging slightly after the leaves; peduncle 8 - 16.5 cm x 1 - 1.5 mm spathe 5 - 6 cm long; spathe limb oblong-elliptic, 3 - 3.5 cm x 8 - 11 mm, apex subacute to rather obtuse, minutely apiculate, base rather short-decurrent into lower spathe; lower spathe margins clasping to slightly erect, 1.5 - 2 x 1.5 - 2 mm; spadix 3 - 3.5 cm x 2 - 3 mm, free portion cylindric, 2.5 - 3 cm, tapering apically in an appendix composed of free synandrodes. Flowers: synandria oblong-elliptic in plan view, 6 - 8 x 1 - 2 mm; ovaries ellipsoid to bottle-shaped, 3 x 1 mm, c. 7 in a single row; stigma capitate, c. 0.33 mm diam; style ± absent. Infructescence: enclosed by the persistent spathe tube, few-berried; berries ellipsoid, 4 - 5.5 x 3 x 4 mm, stigmatic remains persistent, prominent. (Fig. 7.).

DISTRIBUTION. Thailand, Vietnam. THAILAND. Chaiyaphum: Phu-Landca Forest Reserve, 1981, Vamanonda 1 (K spirit 46483! & 57280!). VIETNAM. Ha bac: Lang-met, May 1925, Colani 2919 (holotype P!; isotypes K (photo!), P!, SGN!).

HABITAT. Unknown. This is the most distinctive species of Hapaline, with leaves with a prominent constriction at the junction of the anterior and posterior lobes and large inflorescences. A plant grown at Kew under Vamanonda 1 originated from Thailand and is the only record of the species outside Vietnam. Both the type collection and the plant grown at Kew have leaves with irregular pale green and silver-grey markings.