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

1. Oligostachyum oedogonatum (Z. P. Wang & G. H. Ye) Q. F. Zheng & K. F. Huang, Wuyi Sci. J. 2: 92. 1982.

肿节少穗竹 zhong jie shao sui zhu

Pleioblastus oedogonatus Z. P. Wang & G. H. Ye, J. Nanjing Univ., Nat. Sci. Ed. 1981(1): 96. 1981; Arundinaria oedogonata (Z. P. Wang & G. H. Ye) G. Y. Yang & C. S. Chao; Clavinodum oedogonatum (Z. P. Wang & G. H. Ye) T. H. Wen; Indosasa curviaurita B. M. Yang.

Culms ca. 4.5 m, ca. 0.8 cm in diam.; internodes initially dull green becoming gray-green, sometimes with minute dark purple dots, to 33 cm, basally swollen, white powdery, glabrous; supra-nodal ridge strongly elevated, much more prominent than slightly elevated sheath scar. Branches (3–)5(–7) per node, horizontally spreading, subequal in diam. Culm sheaths purple-green, basally, marginally, and apically dark purple, thinly white powdery, lower and middle culm sheaths rather densely strigose; auricles deciduous, deep purple, small; oral setae 3–5, purple; ligule subtruncate, ca. 3 mm, margins subglabrous; blade erect or spreading, deep purple, lanceolate to linear. Leaves 2 or 3 per ultimate branch; sheath glabrous throughout; auricles deciduous, deep purple, narrowly falcate; oral setae several; ligule arcuate, ca. 2 mm, margin subglabrous; blade linear-lanceolate, 13–25 × 0.7–3.9 cm, both surfaces glabrous, secondary veins 5–8-paired. Racemes 4–6 cm, with 2 or 3 spikelets; peduncles slender, enclosed by sheathlike bracts, bracts gradually larger; axis slender, glabrous; pedicels ca. 1.5 cm, slender, glabrous or sometimes sparsely pubescent, angles slightly scabrous. Spikelets 1.5–5 cm; florets several to many. Rachilla readily disarticulating below fertile florets, internodes 2–3.5 mm, angles and apex ciliate. Glumes 1–3, first small, second and third resembling lemma, ca. 1.1 cm, 7–9-veined; lemma 1.3–1.6 cm, 7–11-veined, hirtellous, margins ciliate, apex acuminate with an awnlike point; palea 8–10 mm, keels rigidly ciliate in upper 2/3, apex obtuse or emarginate; lodicules 3. Stamens 3(–5); anthers 4–5 mm. Style 1; stigmas 3. New shoots May, fl. Apr–May.

* Open forests on slopes; below 1500 m. S Zhejiang (N Wuyi Shan)


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