Anthoxanthum arcticum

Veldkamp
Common names: Arctic sweetgrass Hierochloe pauciflore
Synonyms: Hierochloe pauciflora
Treatment appears in FNA Volume 24. Treatment on page 760.

Plants perennial; loosely ces¬pitose or the culms solitary, rhizomes elongate, 0.3-1 mm thick. Culms 5-26 (35) cm. Sheaths glabrous; ligules 0.4-1.3 mm, obtuse; blades 2-25 cm long, 0.7-2 mm in diameter when rolled, involute to convolute, abaxial surfaces glabrous, adaxial surfaces pubescent. Panicles 1-3 (4.5) cm long, 0.3-0.5 cm wide, spikelike, with 1-2 spikelets per branch. Spikelets 3.5-5 mm, green to purple; rachilla internodes about 0.1 mm, glabrous. Glumes subequal, 2.9-4.7 mm, shiny; lowest 2 florets staminate; lemmas sparsely hairy, acute or slightly notched, unawned or awned, awns to 1 mm; bisexual lemmas 2.9-4.4 mm, with sparse, spreading hairs towards the apices; anthers 1.5-3 mm. Caryopses about 2.5 mm. 2n = 28.

Discussion

Anthoxanthum arcticum is a coastal and lowland circumpolar species of the Alaskan, Canadian, and Russian arctic; it is absent from Greenland. It generally grows in wet tundra on acidic, peaty soils. In the warmest sectors of the western high arctic, it is rooted in mats of moss that are growing over carbonate substrates.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Anthoxanthum arcticum"
membranous +  and scarious +
3 +  and 2 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
awned +  and bilobed +
Kelly W. Allied +  and Mary E. Barkworth +
Veldkamp +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
2 cm20 mm <br />0.02 m <br /> (25 cm250 mm <br />0.25 m <br />) +
not evident +
pilose +  and glabrous +
involute +  and convolute +
spikelike +
hairy +  and glabrous +
Arctic sweetgrass +  and Hierochloe pauciflore +
geniculate +
5 cm50 mm <br />0.05 m <br /> (26 cm260 mm <br />0.26 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, Wash. +, Del. +, D.C +, Wis. +, W.Va. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Yukon +, Pacific Islands (Hawaii) +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, N.Mex. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Alaska +, Va. +, Colo. +, Iowa +, Miss. +, Calif. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Okla. +, Idaho +, Md. +, Ohio +, Mo. +, Minn. +, Mich. +, Oreg. +, Mont. +  and Ky. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
pilose +  and glabrous +
keeled +, lanceolate +  and ovate +
subequal +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
exceeding the florets +  and equaling +
uncinate +
0 +  and 1/3 +
hairy +  and glabrous +
3-7-veined +  and 3-veined +
notched +  and acute +
subequal +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
2-keeled +
1cm +  and 3cm +
spikelike +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dry +  and fleshy +
not prolonged +
sessile +  and pedicellate +
green +  and purple +
compressed +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Hierochloe pauciflora +
Anthoxanthum arcticum +
Anthoxanthum +
species +
membranous +
parallel +  and converging +
aquatic +  and terrestrial +