Eriogonum douglasii

Bentham in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 9. 1856.

Endemic
Synonyms: Eriogonum caespitosum subsp. douglasii (Bentham) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 363. Mentioned on page 332, 362, 364, 365.

Herbs, matted, occasionally polygamodioecious, 0.4–1.5 × 0.5–6 dm, thinly tomentose to glabrate. Stems: caudex spreading; aerial flowering-stems erect or nearly so, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, 0.4–1.2 dm, with a whorl of 4–8 leaflike bracts ca. midlength, similar to leaf-blades, 0.3–1.5 × 0.1–0.3 cm. Leaves in basal rosettes; petiole 0.05–0.5 (–1) cm, tomentose; blade oblanceolate or elliptic to spatulate, 0.4–1.5 (–1.9) × 0.1–0.5 cm, lanate on both surfaces, or tomentose abaxially and slightly less so and greenish adaxially, margins entire, plane. Inflorescences capitate, 0.8–1.5 cm wide; branches absent; bracts absent immediately below involucre. Involucres 1 per node, turbinate to turbinate-campanulate, 2.5–3.5 × 2–2.5 mm; teeth 6–14, lobelike, strongly reflexed, 1.5–4 (–6) mm. Flowers 4–9 mm, including 0.7–2 mm stipelike base; perianth yellow, cream, or ochroleucous to rose-red, sparsely to densely villous abaxially; tepals monomorphic, obovate; stamens exserted, 4–6 mm; filaments pilose proximally. Achenes light-brown, 3–4.5 mm, glabrous except for pubescent beak.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Leaf blades tomentose abaxially, less so adaxially, narrowly oblanceolate to spatulate; flowers 5-9 mm; e Washington, ne Oregon Eriogonum douglasii var. douglasii
1 Leaf blades usually densely lanate on both surfaces, elliptic to spatulate; flowers 4-8 mm; s Oregon, ne California, n Nevada > 2
2 Flowers 4-5(-6) mm; s Oregon, ne California, nw Nevada Eriogonum douglasii var. meridionale
2 Flowers 5-8 mm; ne Nevada Eriogonum douglasii var. elkoense

"/2" 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."dm" is not declared as a valid unit of measurement for this property.

... more about "Eriogonum douglasii"
light-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Bentham in A. P. de Candolle and A. L. P. P. de Candolle +
deciduous +  and persistent +
stipelike +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
tomentose +  and lanate +
elliptic;spatulate +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not awn-tipped +
glandular +, pubescent +  and glabrous +
scale-like +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose or glabrous +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
Calif. +, Nev. +, Oreg. +  and Wash. +
curved +  and straight +
unisexual +  and bisexual +
attenuate +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
decumbent to erect +  and prostrate +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not fistulose +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 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 +
open +, simple +  and compound-umbellate +
cymelike +, paniclelike +, racemelike +  and spikelike +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
connate +  and free +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
turbinate +  and turbinate-campanulate +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
cauline +  and basal +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
ochroleucous;rose-red +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
homostylous +  and 3-carpellate +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
, +  and solid +
slender;stout +
persistent +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decumbent to erect +  and prostrate +
prostrate +  and erect +
glandular +, 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 caespitosum subsp. douglasii +
chambered +  and solid +
slender +  and stout +
Eriogonum douglasii +
Eriogonum subg. Oligogonum +
species +
emarginate +  and entire +
1/4 +  and 1/3 +
obovate +
coriaceous +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
herb +  and matted +
thinly tomentose +  and glabrate +
midlength +
3 +, 2 +  and 1 +