Eriogonum heracleoides var. heracleoides

Common names: Parsnip-flower wild buckwheat
IllustratedEndemic
Synonyms: Eriogonum angustifolium Nuttall Eriogonum heracleoides subsp. angustifolium (Nuttall) Piper Eriogonum heracleoides var. angustifolium Bentham Eriogonum heracleoides var. minus
Treatment appears in FNA Volume 5. Treatment on page 353.

Aerial flowering-stems (0.5–) 1–3 (–4) dm, with a distinct whorl of leaflike bracts ca. midlength. Leaf-blades usually linear to linear-oblanceolate or oblanceolate, 2–5 × 0.2–1 (–1.5) cm, densely lanate to tomentose abaxially, floccose or glabrous and green adaxially, rarely densely lanate on both surfaces. Involucres turbinate to campanulate; tubes 2–4.5 mm; teeth 1.5–5 mm. Flowers 4–8 mm; perianth white to cream or ochroleucous.


Phenology: Flowering May–Sep.
Habitat: Sandy to gravelly flats, slopes, and ridges, mixed grassland and sagebrush communities, oak, aspen, and montane to subalpine conifer woodlands
Elevation: (300-)600-3100(-3500) m

Distribution

V5 716-distribution-map.gif

B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Variety heracleoides is widespread and usually common. It is highly variable. Narrow-leaved populations of southern British Columbia, northern Washington, Idaho, and northwestern Montana occasionally are segregated as var. angustifolium, but plants in southeastern Oregon and northeastern Nevada can have narrower leaves during years of limited precipitation, and the same condition is found in scattered populations elsewhere. Plants found farther to the east consistently have broader leaves. This expression of the species is most frequently seen in cultivation.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
light;dark-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Nuttall +
deciduous +  and persistent +
stipelike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
densely white-lanate +  and tomentose +
plane;usually linear;oblanceolate +
0.2cm;1cm +
not awn-tipped +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +, oblanceolate +  and linear +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
Parsnip-flower wild buckwheat +
B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
(300-)600-3100(-3500) m +
curved +  and straight +
unisexual +  and bisexual +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
decumbent to erect +  and prostrate +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
not fistulose +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
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 +
Sandy to gravelly flats, slopes, and ridges, mixed grassland and sagebrush communities, oak, aspen, and montane to subalpine conifer woodlands +
compound-umbellate +  and simple +
subcapitate +  and capitate +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
glabrous +  and tomentose +
turbinate +  and campanulate +
nonmembranous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
lanate +, densely lanate +  and tomentose abaxially +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
cauline +  and basal +
bractlike +
glabrous +  and floccose +
lobed +, undulate +, crisped +, crenulate +  and entire +
tomentose;floccose +
polygamodioecious +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering May–Sep. +
homostylous +  and 3-carpellate +
J. Acad. Nat. Sci. Philadelphia +
, +  and solid +
slender;stout +
persistent +
Illustrated +  and Endemic +
decumbent to erect +  and prostrate +
prostrate +  and erect +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
Eriogonum angustifolium +, Eriogonum heracleoides subsp. angustifolium +, Eriogonum heracleoides var. angustifolium +  and Eriogonum heracleoides var. minus +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum heracleoides var. heracleoides +
Eriogonum heracleoides +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
spatulate +  and oblong-ovate +
coriaceous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
synoecious +, monocarpic +, polycarpic +  and , +
distinct +
midlength +
3 +, 2 +  and 1 +