Arctagrostis latifolia subsp. latifolia

Common names: Polargrass Arctagrostis à larges feuilles
Treatment appears in FNA Volume 24. Treatment on page 678.

Culms (10) 15-50 (95) cm; uppermost nodes usually in the lowest 1/3 of the culm. Uppermost sheaths usually longer than the blades; blades 1-16 cm long, 1.5-9 mm wide. Panicles 2.5-10 (17) cm long, 0.7-3 cm wide; longest branches 0.5-4 (6.5) cm, with 3-15 (40) spikelets per branch; secondary branches usually appressed, spreading in warmer habitats. Spikelets (3) 4-6.5 mm. Glumes subequal; lower glumes 1.8-4.5 mm, 1 (3) -veined; upper glumes 2.3-5.5 mm, usually about 1 mm shorter than the lemmas, (1) 3-veined; lemmas 3-6.5 mm; anthers 1.8-4 mm. 2n = 56.

Discussion

Arctagrostis latifolia subsp. latifolia is the common subspecies from the arctic coast of Alaska to Nunavut, northern Quebec, and northern Greenland.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

membranous +  and scarious +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Mucronate (?) +, Obtuse (?) +  and Acute (?) +
Susan G. Aiken +
(R. Br.) Griseb. +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
1 cm10 mm <br />0.01 m <br /> (16 cm160 mm <br />0.16 m <br />) +
not evident +
cross +, linear +  and narrowly lanceolate +
1.5mm;9mm +
scabridulous +
spikelike +
Polargrass +  and Arctagrostis à larges feuilles +
not branching +
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
15 cm150 mm <br />0.15 m <br /> (50 cm500 mm <br />0.5 m <br />) +
not woody +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Alta. +, B.C. +, Greenland +, Nfld. and Labr. (Nfld.) +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +  and Alaska +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
sometimes longer +
single +, 2 +  and 1 +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
subequal +
uncinate +
1/4 +  and 1/3 +
puberulent +  and scabrous +
lanceolate +  and ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
lacerate +  and obtuse +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
membranous +
inconspicuous +
lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
2.5cm +  and 10cm +
stiffly erect +  and spreading +
spikelike +
0.7 cm7 mm <br />0.007 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
scabrous +  and hairy +
3 +  and 15 +
compressed +
0.4 cm4 mm <br />0.004 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Arctagrostis latifolia subsp. latifolia +
Arctagrostis latifolia +
subspecies +
membranous +
scabridulous +
acute +  and obtuse +
1 cm10 mm <br />0.01 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
parallel +  and converging +
faint +  and prominent +
aquatic +  and terrestrial +