Bromus pumpellianus subsp. dicksonii

W. W. Mitch. & Wilton
Endemic
Treatment appears in FNA Volume 24. Treatment on page 207.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants cespitose, sometimes shortly rhizomatous. Culms 65-135 cm, ascending, often geniculate; nodes 3-7, glabrous or pubescent; internodes glabrous. Sheaths glabrous or hairy; auricles sometimes present; ligules 0.5-4 mm; blades 7-30 cm long, 2.5-8.5 mm wide, glabrous or hairy on both surfaces, sometimes only the adaxial surface hairy. Panicles 10-24 cm, usually open, nodding to partially erect; branches spreading to drooping. Spikelets 16-32 (45) mm. Glumes glabrous or hairy; lower glumes 5-10 mm, 1 (3) -veined; upper glumes 7.5-13 mm, 3-veined; lemmas 9-16 mm, sparsely to densely hairy throughout or along the marginal vein and keel; awns 2.5-7.5 mm; anthers (3.5) 4-6 (6.8) mm. 2n = 28.

Discussion

Bromus pumpellianus subsp. dicksonii grows in shallow, rocky soils of river banks and bluffs in the Yukon River drainage of Alaska. Apart from the more restricted distribution, it is not clear how this subspecies differs from the introduced B. riparius.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

membranous +  and scarious +
3.5 cm35 mm <br />0.035 m <br /> (?) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
emarginate +  and entire +
Subulate (?) +  and Acute (?) +
Leon E. Pavlickf +
W. W. Mitch. & Wilton +
1 (?) +  and 3 (?) +
straight +
distinct +
subterminal +  and terminal +
geniculate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
7 cm70 mm <br />0.07 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not evident +
hairy +  and glabrous +
cross +, linear +  and narrowly lanceolate +
2.5mm;8.5mm +
spreading;drooping +
spikelike +
not branching +
geniculate +
65 cm650 mm <br />0.65 m <br /> (135 cm1,350 mm <br />1.35 m <br />) +
not woody +
Conn. +, Mass. +, N.H. +, N.J. +, N.Y. +, Calif. +, Del. +, N.C. +, Va. +, W.Va. +, Vt. +, D.C +, Wis. +, Colo. +, Kans. +, Nebr. +, Okla. +, Idaho +, Mont. +, Oreg. +, Wash. +, Wyo. +, Pacific Islands (Hawaii) +, N.Mex. +, Utah +, Maine +, R.I. +, Fla. +, Ala. +, Ark. +, Ariz. +, Ga. +, Iowa +, Ill. +, Ind. +, Ky. +, La. +, Md. +, Mich. +, Minn. +, Mo. +, Miss. +, N.Dak. +, Nev. +, Ohio +, Pa. +, S.Dak. +, Tenn. +, Tex. +, Alaska +, S.C. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +  and Yukon +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
4 +  and 14 +
terete +  and laterally compressed +
1-9(11)-veined +
always shorter +  and usually shorter +
lanceolate +
subtending +
hairy +  and glabrous +
mucronate +  and acute +
unequal +
uncinate +
solid +  and hollow +
along the marginal vein +  and hairy +
rounded +  and lanceolate +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
herbaceous +  and coriaceous +
obtuse +  and truncate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
concealed +  and prominent +
pubescent +  and glabrous +
3 +  and 7 +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
reduced +
nodding +  and partially erect +
10 cm100 mm <br />0.1 m <br /> (24 cm240 mm <br />0.24 m <br />) +
dry +  and fleshy +
hairy +  and glabrous +
1 +  and 60 +
not viviparous +
elliptic +  and lanceolate terete +
1.6 cm16 mm <br />0.016 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Bromus pumpellianus var. arcticus +, Bromus inermis subsp. pumpellianus +, Bromus inermis var. purpurascens +, Bromopsis pumpelliana var. arctica +, Bromopsis pumpelliana +  and Bromopsis inermis subsp. pumpellianus +
Bromus pumpellianus subsp. dicksonii +
Bromus pumpellianus +
subspecies +
membranous +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
plant +  and cespitose +
aquatic +  and terrestrial +