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68a. Poa lapponica subsp. acmocalyx (Keng ex L. Liu) Olonova & G. Zhu, Fl. China. 22: 300. 2006.

尖颖早熟禾 jian ying zao shu he

Basionym: Poa acmocalyx Keng ex L. Liu, Fl. Reipubl. Popularis Sin. 9(2): 388. 2002.

Culms loosely tufted, ca. 45 cm, erect. Leaf sheaths glabrous, longer than internodes, uppermost 10–15 cm, almost reaching panicle, slightly longer than blade; blade 7–14 cm × 2–3 mm, adaxially scabrid; ligule 0.5–0.8 mm. Panicle effuse, 12–15 cm; primary branch 5–10 cm. Spikelets 5–6 mm, florets 2 or 3; rachilla glabrous; callus sparsely villous. Anthers ca. 1.5 mm. Fl. and fr. Jun–Aug.

* Grassy places on sunny slopes; 1000–3900 m. Jilin, N Sichuan.

This subspecies combines the characters of Poa nemoralis (ligule not exceeding ca. 1 mm) and P. palustris (rachilla glabrous). The type material of P. acmocalyx is quite mesomorphic, with the uppermost node at about the middle of the culm, although FRPS (loc. cit.) gives it as in the lower 1/4, which would be a better match for P. faberi.


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