多脉早熟禾Poa polyneuron Bor

科名：禾本科 Gramineae

属名：早熟禾属 Poa

《中国植物志》第9(2)卷170页
  133．多脉早熟禾（西藏植物志）图版14：13
  Poa polyneuron Bor in Kew Bull. 1952: 223. 1952. et in Grass. Burma Ceyl. Ind. Pakist. 559. 1960; 西藏植物志5: 110. 1987.
  多年生。秆基部稍倾卧，高约30厘米。叶鞘干膜质，老后成纤维状；叶舌长2毫米，褐色膜质，顶端尖；叶片长3-5厘米，宽约5毫米，顶端急尖成船形，干后暗褐色，两面平滑无毛，边缘和中脉下面微粗糙。圆锥花序疏松开展，基部为叶鞘包藏；分枝孪生，平滑无毛或先端微粗糙；小穗椭圆形，含3-4小花，长5.5-7毫米；小穗轴平滑无毛；颖椭圆形，边缘膜质，脊顶端粗糙，第一颖长4.5-5毫米，宽1.6-1.8毫米，具3脉，脊弧形弯曲，第二颖长5毫米，宽3毫米，具3-5脉，脊直伸，间脉等长于中脉，边脉细弱；外稃宽椭圆形，具5-7脉，背脊稍弯弓，顶端与边缘具宽膜质，脊与全部脉之下部2/3生有柔毛，下半部脉间密生绒毛，基盘无绵毛，第一外稃长5毫米，宽3毫米；内稃等长于外稃，脊上部粗糙，下半部生短柔毛，脊间生微毛；鳞被较大，截形或有裂齿；花药长2.5毫米。花果期6-8月。
  产西藏亚东。生于高山草坡，海拔4000米。分布于锡金。模式标本采自锡金。
  本种外稃长约5毫米，具5-7脉，脉间下部密被绒毛，基盘无绵毛；内稃脊间生微毛；花药长2.5毫米；第一颖大，有3脉；叶片干后变褐色，长3-5厘米，宽5毫米；花序疏展，基部为顶生叶鞘所包藏。

《Flora of China》 Vol. 22 (2006)
Poa polyneuron  Bor
多脉早熟禾   duo mai zao shu he
Perennials, loosely tufted, rhizomatous; shoots extravaginal. Culm base slightly decumbent, 30–55 cm × 1–2.5 mm, nodes 3 or 4, 1 or 2 exserted. Leaf sheaths strongly keeled with a narrow wing, basal ones finely retrorse strigose, becoming fibrous, middle and upper ones smooth, 11–15 cm, ca. 3 × as long as blade, uppermost closed for 1/2–2/3 of length; blade flat or folded, moderately thin, 3–8 cm × (1.5–)4–5 mm, surfaces smooth, or adaxially sparsely scabrid, margins and keel smooth or scabrid, apex abruptly prow-tipped, tillers to 15 cm × 2 mm; ligules brown, membranous, ca. 2 mm, abaxially smooth, apex acuminate. Panicle open, lax, 10–17 × 2–6 cm, longest internode 3–4 cm; branches spreading, 2 per node, smooth throughout or with infrequent hooks, longest 3–8 cm with 3–6 well-spaced spikelets in distal 1/3. Spikelets elliptic, 5.5–7 mm, florets 3 or 4; vivipary absent; rachilla internodes to 1.2 mm, smooth, glabrous; glumes broadly lanceolate, keel scabrid above, surfaces minutely punctate with or without purple papillae, lower glume 4.5–5 mm, 3-veined, upper glume ca. 5 mm, 3(or 5)-veined, smooth or sparsely scabrid; lemmas broadly elliptic, ca. 5 mm, 5–7-veined, keel slightly arched, keel shortly villous for 2/3 of length, marginal veins for 1/2, intermediate veins prominent, surfaces proximally densely pilulose, distally sparsely scabrid; callus glabrous or scantily webbed with a few hairs to 1/2 as long as lemma; palea with slender hooks to proximally pilulose between keels, keels medially pilulose, distally scabrid. Anthers 1.6–2.2 mm. Fl. and fr. Jun–Aug.
High mountains, grassy slopes; ca. 4000 m. Xizang [India (Sikkim)].
The type of Poa polyneuron is from the India-Xizang border. Rajbhandari (Bull. Univ. Mus. Univ. Tokyo 34: 203. 1991) discussed it under P. gammieana. It also approaches P. grandis. The flowers examined were perfect, but if it were related to P. grandis it would be expected also to have female florets.