Difference between revisions of "Festuca groenlandica"
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Latest revision as of 17:24, 11 May 2021
Plants densely cespitose, without rhizomes. Culms 10-37 cm, erect, glabrous, smooth. Sheaths closed for about 1/2 their length, glabrous, persistent; collars glabrous; ligules 0.2-0.5 mm; blades 0.4-0.7(1) mm in diameter, conduplicate, veins 5-7, ribs 1-5, abaxial surfaces smooth, adaxial surfaces scabrous or puberulent; abaxial sclerenchyma in 5-7 strands, at least twice as wide as high, often some strands confluent; adaxial sclerenchyma absent. Flag leaf sheaths tight or somewhat loose; flag leaf blades 1-5 cm. Inflorescences (1.5)2-5 cm, contracted, with 1-2 branches per node; branches erect, lower branches with 2+ spikelets. Spikelets 4-5.6(6) mm, with 3-4(5) florets. Glumes exceeded by the upper florets, ovate-lanceolate, mostly glabrous and smooth, sometimes scabrous distally; lower glumes 1.5-2 mm, lanceolate to ovate-lanceolate; upper glumes (2)2.2-2.7 mm, ovate; lemmas (2.5)3-3.5(4) mm, ovate-lanceolate to lanceolate, usually scabrous distally, sometimes smooth, usually awned, occasionally unawned, awns 0.7-2.1 mm, terminal; paleas about as long as the lemmas, intercostal region smooth or scabrous distally; anthers 0.8-1.3 mm; ovary apices glabrous. 2n = 42.
Discussion
Festuca groenlandica is endemic to Greenland. Scholander (1934) initially described it as a variety of F. brachyphylla (p. 428), but it differs from that species in having more extensive blade sclerenchyma, usually 7 broad abaxial strands rather than 5 narrow strands.
Selected References
None.