Difference between revisions of "Festuca baffinensis"

Polunin
Common names: Baffin island fescue
Treatment appears in FNA Volume 24. Treatment on page 432.
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Revision as of 21:20, 16 December 2019

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Illustrator: Cindy Roché

Copyright: Utah State University

Plants densely cespitose, without rhizomes. Culms 5-25(30) cm, densely pubescent or shortly pilose near the inflorescence. Sheaths closed for about 1/2 their length, glabrous, persistent or slowly shredding into fibers; collars glabrous; ligules 0.1-0.3 mm; blades (0.4)0.6-1(1.2) mm in diameter, conduplicate, abaxial surfaces smooth or sparsely scabrous, adaxial surfaces scabrous or puberulent, veins (3)5-7, ribs 3-5; abaxial sclerenchyma in 3-7 small strands, usually less than twice as wide as high; adaxial sclerenchyma absent. Flag leaf sheaths usually somewhat loosely enclosing the culms; flag leaf blades 0.5-4 cm. Inflorescences 1.5-4(5) cm, contracted, usually panicles, rarely racemes, usually somewhat secund, with 1-2 branches per node; branches erect, lower branches with 2+ spikelets. Spikelets (4.5)5-7.5(8.5) mm, with (2)3-5(6) florets. Glumes exceeded by the upper florets, ovate-lanceolate, scabrous distally; lower glumes 2.2-3.7(4) mm; upper glumes 3-5 mm; lemmas (3.5)4-6 mm, scabridulous near the apices, awns 0.8-2.6(3.3) mm, terminal; paleas slightly shorter than to as long as the lemmas, intercostal region scabrous distally; anthers 0.3-0.7 (1.1) mm; ovary apices usually with a few hairs, rarely glabrous. 2n = 28.

Distribution

Colo., Alta., B.C., Greenland, N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Mont., Idaho, Utah, Wyo.

Discussion

Festuca baffinensis grows chiefly in damp, exposed, gravelly areas in calcareous and volcanic regions. It is circumpolar in distribution, growing in arctic and alpine habitats and extending southward in the Rocky Mountains to Colorado. It has frequently been included in F. ovina (p. 422). It may hybridize with F. brachyphylla (p. 428) and/or other species to form F. viviparoidea (p. 436).

Selected References

None.

Lower Taxa

None.
... more about "Festuca baffinensis"
Stephen J. Darbyshire +  and Leon E. Pavlickf +
Polunin +
Baffin island fescue +
Colo. +, Alta. +, B.C. +, Greenland +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +, Mont. +, Idaho +, Utah +  and Wyo. +
Gramineae +
Festuca baffinensis +
Festuca sect. Festuca +
species +