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

22. Poa raduliformis Probatova, Novosti Sist. Vyssh. Rast. 8: 25. 1971.

糙早熟禾 cao zao shu he

Poa remota Forselles subsp. raduliformis (Probatova) Voroschilov.

Perennials, shortly rhizomatous, rhizomes yellowish orange to reddish brown, slender. Plants yellowish green. Culms 35–90 cm tall, 3–4 mm in diam., nodes 2 or 3, uppermost node ca. 1/2 way up, often slightly scabrid below the panicle and nodes. Leaf sheaths compressed, keeled, 10–20 cm, lower ones distinctly retrorsely hispidulous, uppermost closed for 1/3 of length; blade flat or infrequently folded, moderately thin, 8–15 cm × (1.5–)3–5 mm, adaxial surface of basal blades sparsely pilulose; ligules 2–3.5 mm, apex ciliolate, abaxially sparsely puberulent. Panicle open, oblong, 8–20 cm; branches ascending, spreading in anthesis, scabrid throughout, longest 3–5 cm with 3–10 spikelets in distal 1/2. Spikelets green, 3.5–6 mm, florets 2–4; vivipary absent; glumes strongly keeled, keel almost straight, keel and lateral veins moderately densely scabrid, surface sometimes moderately scabrid above, 3-veined, apex acuminate, lower glume 2–3 mm, upper glume 2.5–3.5 mm; lemmas lanceolate, 3.3–4.5 mm, keel and marginal veins with lower part sparsely pilulose, surfaces glabrous, finely minutely bumpy; callus webbed; palea glabrous between keels, keels scabrid. Anthers 1.8–2.4 mm. Fl. and fr. Jun–Jul. 2n = 70.

Forest margins, roadside thickets; ca. 2600 m. ?Shanxi [Japan, Mongolia, Russia (Far East, E Siberia)].

Tzvelev (Zlaki SSSR, 451. 1976) considered Poa raduliformis as probably "a result of hybridization of P. pratensis with P. remota, P. radula, or P. sibirica." It seems few gatherings from China might be called P. raduliformis, and the report from Shanxi in FRPS (9(2): 130–131. 2002) is doubtful. The species should be looked for in Heilongjiang.


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