21e. Poa pratensis subsp. sergievskajae (Probatova) Tzvelev, Novosti Sist. Vyssh. Rast. 11: 27. 1974.
色早熟禾 se zao shu he
Poa sergievskajae Probatova, Novosti Sist. Vyssh. Rast. 8: 28. 1971.
Plants loosely tufted, not forming a turf, slender rhizomatous, shoots mainly extravaginal. Culms solitary, erect, slender, 20–80 cm tall. Leaf sheaths of lower leaves retrorsely hispidulous, blades flat with slightly inrolled margins, 1–3 mm wide, adaxially sparsely pubescent, of tillers folded, to 25 cm × 0.8–1.4 mm. Panicle open, pyramidal, 5–15 cm; branches slightly flexuous, slender, nearly smooth to moderately scabrid, longest with 3–10 spikelets. Spikelets pale green, 3–5 mm; glumes unequal, lower glume 1-veined; lemmas 2.5–3.5 mm, keel and marginal veins loosely villous; palea glabrous between keels, keels scabrid. Anthers 1.3–1.8 mm. Fl. and fr. Jul.
Betula and Picea forests, shade of shrubs, moist ground. ?Heilongjiang, ?Jilin, ?Xizang [Russia (Far East, Siberia)].
A number of gatherings from China fits this taxon, which may merely represent a minor variation within Poa pratensis, possibly from low nutrient (acidic), shady, moist habitats.