Eriogonum flavum var. aquilinum

Reveal

Ark. Bot., n. s. 7: 46. 1968.

Common names: Yukon wild buckwheat
Endemic
Treatment appears in FNA Volume 5. Treatment on page 372. Mentioned on page 371.

Plants tight, compact mats, 3–10 dm wide. Aerial flowering-stems mostly erect, 0.2–0.8 dm. Leaf-blades narrowly elliptic, 1–2 (–3.5) × 0.4–1 cm, densely tomentose abaxially, floccose and greenish adaxially. Inflorescences umbellate; branches 0.5–2 cm. Involucres usually turbinate-campanulate, (4–) 5–7 (–8) mm. Flowers 3–5 (–6) mm, including 0.2–0.3 mm stipelike base; perianth bright-yellow.


Phenology: Flowering Jul–Aug.
Habitat: Exposed bluffs, mixed grassland communities, willow thickets
Elevation: 300-500 m

Discussion

Variety aquilinum is rare and isolated, known only from the Eagle area of extreme east-central Alaska (including the Kathul Mountains, Southeast Fairbanks County) and from the Aishihik Lake area in the Yukon Territory. It is closely related to and marginally distinct from var. flavum, its isolation the result of Pleistocene glaciation.

Selected References

None.

Lower Taxa

None.

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light-brown;brown +
included +  and exserted +
3-gonous +, lenticular +  and ridged +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Reveal +
deciduous +  and persistent +
stipelike +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
awn-tipped +  and simple +
7 cm70 mm <br />0.07 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
green +  and whitish +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
mostly tomentose +  and floccose or glabrous +
linear-oblanceolate;oblong or elliptic +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +  and semileaflike +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose +
scabrellous +
ridged +, angled +  and round +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
spreading +  and erect +
whorled +, opposite +  and alternate +
Yukon wild buckwheat +
Yukon +  and Alaska. +
300-500 m +
straight +  and curved +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
unisexual +, , +  and bisexual +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Exposed bluffs, mixed grassland communities, willow thickets +
capitate +  and subcapitate +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
tomentose +  and floccose +
turbinate-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
floccose +  and tomentose +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
bright-yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and floccose +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Jul–Aug. +
homostylous +  and 3-carpellate +
Ark. Bot., n. s. +
, +  and solid +
slender;stout +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decumbent to erect +  and prostrate +
prostrate +  and erect +
pubescent +  and glabrous +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
spreading;erect +
Eriogonum flavum var. polyphyllum +  and Eriogonum polyphyllum +
chambered +  and solid +
slender +  and stout +
Eriogonum flavum var. aquilinum +
Eriogonum flavum +
variety +
emarginate +  and entire +
0 +  and 1/2 +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +, biennial +  and perennial +
tomentose +  and floccose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +