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

52. Poa burmanica Bor, Kew Bull. [3]. 1948: 141. 1948.

缅甸早熟禾 mian dian zao shu he

Annuals or short-lived perennials, weakly stoloniferous; shoots extra- and intravaginal. Culms loosely tufted, mostly flowering, 10–60 cm tall, 0.5–0.8 mm in diam., smooth or sparsely retrorse scabrid below lower nodes, glabrous, nodes 3–5, 3 or 4 exserted. Leaf sheaths smooth, glabrous or sparsely retrorsely strigulose, 7–12 cm, 1–2 × as long as blade, uppermost closed for 1/4–1/3 of length; blade flat, thin, 2–6 cm × 1.5–2.5 mm, adaxial surface and margins scabrid, apex slender prow-tipped; ligule 0.8–1.3 mm, abaxially smooth or scabrid, apex truncate to obtuse, collars smooth or slightly scabrid, margins glabrous or ciliate. Panicle open, lax, slightly exserted, 8–13 × 3–5 cm, longest internodes 2–3.5 cm; branches spreading, flexuous, 2 per node, capillary, scabrid throughout, distally angled, longest 2–5 cm with 2–5 spikelets, Spikelets 5–5.5 mm, florets 2 or 3; vivipary absent; rachilla internodes to 1 mm, smooth, glabrous; glumes lanceolate, unequal, lower glume subulate, 1.6–3 mm, distinctly shorter than the upper, keel nearly smooth, 1-veined, upper glume 3.2–4.1 mm, strongly 3-veined, keel scabrid; lemmas oblong, 3.7–4.6 mm, ca. 5 × as long as wide, 5(–7)-veined, apex slightly acuminate, keel shortly villous for 4/5 of length, marginal veins for 2/3, intermediate veins prominent, areas between veins basally pilulose, apically scabrid; callus densely webbed; palea distinctly shorter than lemma, sparsely pilulose between veins, keels scabrid, sometimes medially pilulose. Anthers 0.6–1 mm. Fl. and fr. May–Jun.

Alpine meadows; ca. 3700 m. SW Sichuan, SE Xizang, NW Yunnan [Myanmar].

Poa burmanica is distinguished from P. himalayana, P. khasiana, and P. rajbhandarii by the pubescent sides of the lemmas and by little else.


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