Botanical name: Burmannia disticha Family: Burmanniaceae (Bluethread family)
Synonyms: Burmannia bancan, Burmannia graminifolia, Burmannia sumatrana
Double-Spike Bluethread is an erect herb up to about 70 cm tall with 1-3 unbranched leafy peduncles, hairless. Leaves are spreading in a basal rosette, smaller and more erect on the stem, linear to lanceshaped or elliptic, 1-13 cm long, 2-10 mm wide, tip pointed to long-pointed and sometimes with glandular hairs. Blade is stalkless and stem-clasping with a sheathing base. Flowers are usually borne in a pair of up to 15-flowered spike-like branches, 0.6-7 cm long. Peduncle is 2-13 cm long, flowers stalkless, bracts 3-11 mm long. Flowers are 0.8-3 cm long, blue with yellow bands, tube 8-30 mm long, 3-8 mm in diameter, 3-winged, lobes 0.5-3 mm long. Capsule is ellipsoid to ovoid, 3-ridged 6-20 mm long. Double-Spike Bluethread is China, Nepal, India, SE Asia and Australia, at altitudes of 400-3000 m.
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The flower labeled Double-Spike Bluethread is ...