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FOC | Family List | FOC Vol. 22 | Poaceae | Bonia

1. Bonia saxatilis (L. C. Chia et al.) N. H. Xia, Kew Bull. 51: 567. 1996.

单枝竹 dan zhi zhu

Culms 1–4 m, 4–8 mm in diam.; internodes 25–40 cm, glabrous, initially white powdery. Branches 0.5–1.5 m. Culm sheaths shortly tomentose and stiffly dull brown hairy, or glabrous; auricles subfalcate, amplexicaul; oral setae ca. 1 cm; ligule margin with 5–10 mm cilia; blade reflexed, lanceolate, base cordate. Leaf sheaths distally white powdery and shortly tomentose, sometimes stiffly dull brown hairy; auricles subfalcate; oral setae ca. 1 cm; ligule margin with cilia 5–10 mm; blade usually 20–35 × 3.5–6 cm, abaxially glaucous, subglabrous. Pseudospikelets 2–3 cm; prophylls 2-keeled, ca. 8 mm, keels ciliate; gemmiferous bracts ovate-elliptic, ca. 9-veined, abaxially slightly hairy. Spikelets with 5–9 florets, first floret longest; first internode of rachilla longest, 7–10 mm, terete, angular, apex slightly hairy, other internodes progressively shorter and flattened on one side. Glumes lanceolate, ca. 11-veined, apex mucronate, lower glume ca. 1 cm, upper ca. 1.2 cm; lemma ovate-lanceolate, ca. 1.3 cm, 9–11-veined, apex acute or mucronate. Palea narrowly lanceolate, 2-keeled, brown hairy, 4-veined between keels, 2-veined on each side of keels, apex obtuse. Lodicules 3, heteromorphic, ca. 1 mm. Anthers 2–3 mm; filaments very short. Ovary ellipsoid, ca. 0.7 mm; stigmas 3, 1.5–1.8 mm. Fruit unknown.

* Limestone hills and mountains. Guangdong, Guangxi.

1 Culm sheaths shortly tomentose with stiff, dull brown hairs.   1a var. saxatilis
+ Culm sheaths abaxially glabrous.   1b var. solida


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