长梗开口箭 chang geng kai kou jian

Tupistra longipedunculata F. T. Wang & S. Yun Liang in F. T. Wang & T. Tang, Fl. Reipubl. Popularis Sin. 15: 249. 1978.

Rhizome yellow-brown, short, terete, 1.5--1.7 cm thick; nodes dense. Leaves 3--5, basal, distichous equitant; petiole 5--12 cm; leaf blade usually linear-oblanceolate, 40--80 × 3--6.5 cm, papery or subleathery. Spike 5.5--8 × 1--1.5 cm, densely many flowered; peduncle 15--40 cm, much longer than spike; fertile bracts green, ovate, 3.5--5.5 × 2.5--3 mm, margin white. Perianth subcampanulate, 4.5--5 mm; tube 2.5--3 mm; lobes yellow, deltoid-ovate, 2--2.5 × 1.5--2.5 mm, fleshy. Filaments with very short free part. Ovary ovoid, ca. 3.5 mm. Style inconspicuous; stigma 3-lobed. Fl. Jun. 2 n = 38*.

* Forests, hillsides along streams, shady limestone slopes; 500--1700 m. Yunnan.