Difference between revisions of "Festuca rubra subsp. aucta"

(V.I. Krecz. & Bobrov) Hultén
Treatment appears in FNA Volume 24. Treatment on page 414.
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name=Festuca rubra subsp. aucta
 
name=Festuca rubra subsp. aucta
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|family=Poaceae
 
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|illustration copyright=Utah State University
 
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_585.xml
 
|subfamily=Poaceae subfam. Pooideae
 
|subfamily=Poaceae subfam. Pooideae
 
|tribe=Poaceae tribe Poeae
 
|tribe=Poaceae tribe Poeae

Latest revision as of 16:12, 1 December 2021

Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants rhizomatous, loosely cespitose, with several culms arising from the same tuft. Culms 30-120 cm. Sheaths pubescent, shredding into fibers, cauline leaf sheaths loosely enclosing the culms; vegetative shoot blades usually loosely conduplicate, sometimes flat, deep green, not glaucous, abaxial surfaces more or less uniformly scabridulous or roughened, ribs hispid or pilose; cauline blades 2-4 mm wide, usually flat or loosely conduplicate; abaxial sclerenchyma in small strands; adaxial sclerenchyma sometimes present. Inflorescences 10-25 cm, often open, lax, secund or partially secund, often partially included in the uppermost leaf sheaths at maturity; branches scabrous. Spikelets 9-14 mm, oblong, with (4)5-8(10) florets, mostly deep green or glaucous. Glumes ovate-lanceolate to lanceolate, acute to acuminate; lower glumes 3.5-6 mm; upper glumes 5.5-8.5 mm; lemmas 6-9 mm, attenuate in side view, usually glabrous, sometimes pubescent, usually mostly smooth, margins and apices scabrous, sometimes almost completely scabrous, deep green or the margins violet, sometimes glaucous, occasionally pubescent, apices awned, awns 2.5-4.5 mm; anthers 2.5-3.5 mm. 2n = unknown.

Discussion

Festuca rubra subsp. aucta is a coastal taxon, growing above the high tide line in the sand of stabilized sand dunes, beaches, etc., or in silt deposits. Its range extends along the Pacific coast from the Kamchatka Peninsula through the Aleutian Islands, Queen Charlotte Islands, and Vancouver Island and the adjacent continental coastline. Festuca pseudovivipara (p. 41S) has been described as a form of F. rubra subsp. aucta, but differs from that taxon in having pseudcviviparous spikelets. It is also ecologically, altitudinally, and probably reproductively isolated from F. rubra subsp. aucta.

Selected References

None.

Lower Taxa

None.
Stephen J. Darbyshire +  and Leon E. Pavlickf +
(V.I. Krecz. & Bobrov) Hultén +
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, Del. +, D.C. +, Wis. +, W.Va. +, Pacific Islands (Hawaii) +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Oreg. +, Wyo. +, Ala. +, Ariz. +, Ga. +, Iowa +, Ill. +, Ind. +, Ky. +, Md. +, Mich. +, Minn. +, Mont. +, N.Dak. +, Nebr. +, N.Mex. +, Pa. +, S.C. +, Tex. +, N.C. +, Tenn. +, Calif. +, Nev. +, Alaska +, Colo. +, Idaho +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ohio +, Utah +  and Mo. +
Gramineae +
Festuca rubra subsp. aucta +
Festuca rubra +
subspecies +