Poa secunda, Sandberg bluegrass

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Intermountain Flora
Small, densely tufted perennials, often producing extensive tufts of basal leaves that wither and disappear early; plants often more or less completely purple-tinged; culms 2-3.5 (4.5) dm tall, wiry; culm leaves usually 1 or sometimes 2; sheaths glabrous to scabrous, closed only at the base, persisting and often in thick rings; lingules acute, usually rather prominent, those on the basal leaves mostly less than 1.5 mm long and those of the culm leaves usually more than 2.5 mm; blades soft, folded or involute, rarely flat, 0.5-1.5 mm broad and 3-5 cm long, often becoming curled, the tip usually definitely boat-shaped, the basal cluster of leaves 3-10 (14) cm high; panicles (2) 3-7 (10) cm long, narrow to rather open, but usually not dense, the branches short, usually ascending; spikelets (4) 5.5-8.5 (9.5) mm long, 2- to 4-(6)-flowered, little compressed and rather terete, narrow and pointed, usually srtongly tinged with purple; glumes acute, hyaline-margined, scabrous, the first glume 2.2-4 (5) mm long, 1-nerved, the second 3-5 mm long, 3-nerved; lemmas (3) 4-5 (5.5) mm long, rounded below and only slightly keeled above, becoming increasingly crisp-puberlent below, often with slightly longer hairs on the central and marginal nerves, scarious on the margins and the acutish apex, not at all webbed at the base; anthers 1.5-2 mm long; lodicules about 0.8 mm long; 2n = 74, 81, 82, 84, 86, 87.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1977) "Intermountain Flora" pg. 246-248, vol. 6, The New York Botanical Garden New York.