环花开口箭 huan hua kai kou jian

Tupistra annulata H. Li & J. L. Huang, Acta Bot. Yunnan., Suppl. 3: 51. 1990.

Rhizome terete, 2.5--3 cm thick; nodes dense. Leaves 6--8, basal or nearly so, slightly or scarcely distichous equitant, gradually narrowed into indistinct petiole; leaf blade oblanceolate-oblong, 15--40 × 2.5--4 cm. Spike ca. 5 cm, densely many flowered, with several sterile bracts apically; peduncle ca. 4 cm; fertile bracts 2 per flower, green, larger one 1.1--1.3 cm, smaller one 4--5 mm. Perianth green, subcampanulate, with a cushionlike, ringed, fleshy, smooth appendage in throat; tube 4--5 mm; lobes ovate-lanceolate, ca. 5 mm, apex incurved, acuminate-cuspidate. Filaments with free part 2--2.5 mm. Ovary globose, ca. 2.5 mm in diam. Style very short. Fl. Mar--May. 2 n = 38*.

* Yunnan.

Described from a cultivated plant.