Eriogonum ursinum var. erubescens

Reveal & J. Knorr

Phytologia 86: 161. 2004.

Common names: Blushing wild buckwheat
Treatment appears in FNA Volume 5. Treatment on page 358.

Plants 1.5–2.5 × (1.5–) 2–8 (–12) dm. Aerial flowering-stems 0.4–2 dm, thinly tomentose to floccose. Leaves: petiole 0.5–1.5 cm; blade elliptic, 0.7–2 (–2.2) × 0.4–1 (–1.2) cm, densely white-tomentose abaxially, sparsely floccose or glabrous and green adaxially. Inflorescences thinly tomentose; proximal bracts 4–6, lanceolate to narrowly elliptic, 1–2 × 0.25–0.6 cm, distal bracts semileaflike, midway along branch, linear to narrowly lanceolate, 0.7–1 × 0.1–0.25 cm. Involucres turbinate to turbinate-campanulate, 5–8 × 3–4 mm. Flowers 5–7 mm at anthesis, 6.5–9 mm in fruit; perianth cream, rarely yellow, becoming suffused with blush of pinkish red to maroon. Achenes (5–) 5.5–8 mm.


Phenology: Flowering Jun–Sep.
Habitat: Gravelly metavolcanic soils in montane chaparral, conifer and mountain mahogany communities
Elevation: 1600-1900 m

Discussion

Variety erubescens is localized and rare, known only from the eastern Scott Bar Mountains west of Yreka in Siskiyou County, and Trinity Mountain, Trinity County. Technically, the three bracts along the “branchlet” terminate a branch, and a peduncle extends from the whorl of bracts to the base of the involucre.

Selected References

None.

Lower Taxa

None.

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

0.5 cm5 mm <br />0.005 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
light-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Reveal & J. Knorr +
deciduous +  and persistent +
stipelike +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
awn-tipped +  and simple +
2 cm20 mm <br />0.02 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glabrous +, floccose +  and white-tomentose +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
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 +
Blushing wild buckwheat +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
linear;narrowly lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1600-1900 m +
curved +  and straight +
not suffused with blush +
unisexual +  and bisexual +
attenuate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 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 +
Gravelly metavolcanic soils in montane chaparral, conifer and mountain mahogany communities +
compound-umbellate +
subcapitate +  and capitate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
connate +  and free +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
turbinate +  and turbinate-campanulate +
nonmembranous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 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 +
suffused with blush of pinkish red;maroon +
glabrous +  and pubescent +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering Jun–Sep. +
homostylous +  and 3-carpellate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
lanceolate;narrowly elliptic +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
, +  and solid +
slender;stout +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 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 +
chambered +  and solid +
slender +  and stout +
Eriogonum ursinum var. erubescens +
Eriogonum ursinum +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
obovate +  and ovate +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
thinly tomentose +  and floccose or glabrate +
2 (?) +  and 8 (?) +
3 +, 2 +  and 1 +