Arctophila

(Rupr.) Andersson
Treatment appears in FNA Volume 24. Treatment on page 605.
 TaxonIllustrator 
FNA24 P229B Arctophila pg 606.jpegArctophila fulvaLinda Ann Vorobik

Plants perennial; rhizomatous, sometimes producing aquatic leaves when submerged. Culms (5) 10-100 cm, erect, glabrous, rooting at the lower nodes; nodes glabrous. Sheaths of aquatic leaves closed to near the apices, translucent, pale pinkish brown; collars inconspicuous; ligules acute; blades pinkish brown. Sheaths of aerial leaves usually closed for over 1/2 their length, sometimes open to the base, opaque, green to olive-green, glabrous; collars conspicuous as a zone of contrasting color; auricles absent; ligules membranous, truncate, lacerate; blades usually flat, glabrous, upper blades conspicuously longer than the lower blades. Inflorescences open panicles; branches stiff and ascending to pendulous, glabrous, some branches longer than 1 cm. Spikelets pedicellate, somewhat laterally compressed, with (1) 2-7 (9) florets; rachillas prolonged beyond the base of the distal floret, glabrous; disarticulation above the glumes, beneath the florets. Glumes subequal, broadly lanceolate to ovate, membranous to subcoriaceous, glabrous, 1-3 (5) -veined, acute to obtuse, unawned; calluses short, blunt, shortly pubescent to almost glabrous; lemmas ovate, glabrous, membranous to subcoriaceous, with 3 (5) obscure veins, lateral-veins usually not reaching the lemma apices, apices entire or somewhat erose, obtuse, unawned or rarely the central vein extended as a short mucro to about 0.2 mm; paleas subequal to the lemmas; lodicules 2, free, glabrous, toothed or entire; anthers 3; ovaries glabrous. Caryopses shorter than the lemmas, concealed at maturity, falling free; hila broadly ovate, 1/6 – 1/5 the length of the caryopses. x = 7.

Distribution

B.C., Greenland, Nfld. and Labr. (Nfld.), Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska

Discussion

Arctophila is a monospecific, but highly polymorphic, holarctic genus closely related to Dupontia (p. 602).

Lower Taxa

"decumbent" is not a number.

... more about "Arctophila"
membranous +  and scarious +
Jacques Cayouette +  and Stephen J. Darbyshire +
(Rupr.) Andersson +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
pinkish brown +
not evident +
cross +, linear +  and narrowly lanceolate +
ascending;pendulous +
spikelike +
glabrous +, pubescent to almost +  and pubescent +
10 cm100 mm <br />0.1 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
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 +
pistillate +  and staminate +
sometimes longer +
2 +  and 7 +
sterile +  and bisexual +
compressed +
reduced +
1-3(5)-veined +
shorter or longer +
subtending +
acute +  and obtuse +
subequal +
membranous +  and subcoriaceous +
uncinate +
1/6 +  and 1/5 +
1-7(9)-veined +
membranous +  and subcoriaceous +
lacerate +  and acute +
membranous +
inconspicuous +
entire +  and toothed +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
subequal +
spikelike +
dry +  and fleshy +
aiken2002a +  and brysting2004a +
1 +  and 60 +
compressed +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Arctophila +
Poaceae tribe Poeae +
membranous +
conspicuously longer +
parallel +  and converging +
aquatic +  and terrestrial +