Eriogonum atrorubens var. atrorubens

Common names: Red wild buckwheat
Treatment appears in FNA Volume 5. Treatment on page 377.

Herbs, polycarpic, 5–10 (–12) dm, glabrous, glaucous; taproot not chambered. Stems: caudex absent; aerial flowering-stems usually 1, usually fistulose, 1–4 dm, glabrous, glaucous. Leaves basal; petiole 3–8 (–10) cm, sparsely strigose; blade oblanceolate or oblong to elliptic, 4–8 × 1–3 cm, strigose on both surfaces, often slightly less so adaxially. Inflorescences 4–8 dm; branches glabrous, glaucous; bracts semileaflike to scalelike, 1–4 (–10) × 1–3 mm. Peduncles erect, straight or curving upward, (1–) 2–6 (–12) cm, glabrous. Involucres turbinate to turbinate-campanulate, 1.5–4 (–4.5) × 1–2.5 (–3) mm, glabrous; teeth 0.5–1.5 mm. Flowers (1.5–) 2–2.5 mm in anthesis, 3–6 mm in fruit; perianth purple to red or maroon, glabrous; tepals broadly spatulate to obovate; stamens 2–2.5 mm; filaments glabrous. Achenes light greenish brown to brown, (2–) 3–5 mm, slightly 3-winged distally, nearly beakless, glabrous. 2n = 40.


Phenology: Flowering Jun–Oct.
Habitat: Sandy to loamy flats and slopes, mixed grassland communities, oak and montane conifer woodlands
Elevation: 1800-2000 m

Distribution

V5 779-distribution-map.gif

N.Mex., Mexico (Chihuahua), Mexico (Durango), Mexico (Sonora), Mexico (Zacatecas)

Discussion

Variety atrorubens enters the flora area in the San Luis Mountains of southern Hidalgo County, New Mexico, literally along the border with Mexico. The root is used medicinally in Mexico as a treatment for toothache.

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.

beakless +  and 3-winged +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
brown;brown +
included +  and exserted +
3-gonous +  and ridged +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Engelmann in F. A. Wislizenus +
deciduous +  and persistent +
stipelike +
Undefined subg. Pterogonum +
awn-tipped +  and simple +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
oblong;elliptic +
1cm;3cm +
not awn-tipped +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glandular +, pubescent +  and glabrous +
semileaflike +  and scalelike +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
glaucous +  and glabrous +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Red wild buckwheat +
N.Mex. +, Mexico (Chihuahua) +, Mexico (Durango) +, Mexico (Sonora) +  and Mexico (Zacatecas) +
1800-2000 m +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unisexual +, , +  and bisexual +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
not disarticulating +, hollow +  and solid +
decumbent to erect +  and prostrate +
slender;stout +
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 loamy flats and slopes, mixed grassland communities, oak and montane conifer woodlands +
open +  and cymose +
capitate +  and subcapitate +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
turbinate +  and turbinate-campanulate +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 m <br />) +
curving +  and straight +
erect to deflexed +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
in F. A. Wislizenus, Mem. Tour N. Mexico, +
, +  and solid +
slender;stout +
persistent +
decumbent to erect +  and prostrate +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
Pterogonum atrorubens +
not chambered +
Slender (?) +  and Stout (?) +
Eriogonum atrorubens var. atrorubens +
Eriogonum atrorubens +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
broadly spatulate +  and obovate +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +, biennial +  and perennial +
glaucous +  and glabrous +
3 +, 2 +  and 1 +