Festuca rubra subsp. arenaria

(Osbeck) F. Aresch.
Common names: Fétuque rouge des sables
Synonyms: Festuca rubra var. lanuginosa
Treatment appears in FNA Volume 24. Treatment on page 414.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants strongly rhizomatous, usually loosely cespitose, with several culms arising from the same tuft. Culms (10) 30-60 cm. Sheaths pubescent, shredding into fibers, cauline leaf-sheaths tightly enclosing the culms; vegetative shoot blades 0.8-1 (1.5) mm in diameter, conduplicate, veins (5) 7-9 (13), ribs (3) 5-7 (9), abaxial surfaces smooth or scabrous, green or glaucous, adaxial surfaces scabrous or pubescent; cauline blades (1) 5-15 (20) cm, conduplicate or flat; abaxial sclerenchyma in 5-7 (9) broad strands, often confluent, sometimes forming a continuous band; adaxial sclerenchyma strands usually present. Inflorescences (5.5) 7-15 (16) cm, open, lanceolate, usually completely exserted from the uppermost leaf-sheaths; branches scabrous. Spikelets (7) 9-10 (13) mm, with (4) 6-8 (9) florets. Glumes ovatelanceolate, acute; lower glumes 3-6 (6.5) mm; upper glumes (3.5) 4-6.5 (8.5) mm; lemmas 6-8 (9.5) mm, lanceolate, green, sometimes glaucous, glabrous or villous, apices acute to acuminate, awned, awns (0.5) 1-2 (3) mm; anthers 2.6-4.5 mm. 2n = 56.

Discussion

Festuca rubra subsp. arenaria is a European taxon that grows in maritime sands and gravels. It is known in the Flora region only from one specimen collected on Vancouver Island; it is not known to have persisted. The description is based on the range of variation seen in Europe. In the Flora region, the name has long been misapplied to F. richardsonii Hook. [= F. rubra subsp. arctica], which also has hairy lemmas.

Selected References

None.

Lower Taxa

None.

"wider than long" is not a number."decumbent" is not a number."longest" is not a number.

membranous +  and scarious +
pubescent +  and scabrous +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
hispidulous +
Acute (?) +  and Acuminate (?) +
Stephen J. Darbyshire +  and Leon E. Pavlickf +
(Osbeck) F. Aresch. +
1 (?) +  and 3 (?) +
0.5 cm5 mm <br />0.005 m <br /> (?) +
straight +
basal +  and terminal +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
keeled +  and rounded +
swelling +
convolute +  and conduplicate +
not deciduous +  and deciduous +
not evident +
flat +, convolute +  and setaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
spreading;erect +
pubescent +, scabrous +  and glabrous +
spikelike +
pubescent +  and glabrous +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Fétuque rouge des sables +
stoloniferous +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
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. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
6 +  and 8 +
compressed +
reduced +
shorter or longer +
subtending +
acute +  and ovatelanceolate +
unequal +  and subequal +
not persistent +
antrorse +  and retrorse +
uncinate +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1-7(9)-veined +
villous +, glabrous +  and glaucous +
lanceolate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
coriaceous +, chartaceous +  and membranous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
concealed +  and prominent +
2 +  and 1 +
with hispidulous apices +  and glabrous +
well-developed +
2-keeled +
spikelike +
dry +  and fleshy +
glabrous +, pubescent +  and scabrous +
5 +  and 7 +
1 +  and 60 +
compressed +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Festuca rubra var. lanuginosa +
Festuca rubra subsp. arenaria +
Festuca rubra +
subspecies +
membranous +
0.4 cm4 mm <br />0.004 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
parallel +  and converging +
obscure +  and prominent +
7 +  and 9 +
plant +  and cespitose +
aquatic +  and terrestrial +