广西柳叶箬 guang xi liu ye ruo

Isachne albens Trinius var. glandulifera P. C. Keng.

Perennial. Culms slender, branching and rooting at lower nodes, ca. 40 cm tall, nodes slightly swollen, puberulous. Leaf sheaths loose, slightly longer to slightly shorter than internodes, glabrous except for ciliate outer margin; leaf blades linear-lanceolate, 5–9 × 0.6–0.8 cm, abaxial surface puberulous, adaxial surface glabrous, margins slightly thickened, base subrounded, apex acuminate; ligule ca. 2 mm. Panicle open, ovate in outline, 6–10 cm, glandular; branches 1–2 per node, scaberulous, lower part naked, pedicels slender, equaling or longer than spikelets. Spikelets elliptic, 1.5–1.9 mm, yellowish green; florets similar, lower male or bisexual, upper bisexual; glumes ovate-elliptic, equaling or slightly longer than florets, hirtellous above middle, obscurely 7–9-veined, acute; lemmas subleathery, glabrous. Fl. and fr. autumn.

* Damp and shady places. Fujian, Guangxi, Hong Kong.

Isachne hirsuta (J. D. Hooker) P. C. Keng var. angusta W. Z. Fang (Acta Phytotax. Sin. 22: 308. 1984), described from Hunan, and I. hirsuta var. yongxiouensis W. Z. Fang (loc. cit.), described from Jiangxi, appear to match this species except that they have hairy leaves. The types have not been seen. They are excluded from I. sylvestris (of which I. hirsuta is a synonym) because they lack the glandular, nodal ring found in that species, and also the leaf blades are smaller.