Eriogonum arcuatum var. rupicola

(Reveal) Reveal

Harvard Pap. Bot. 9: 157. 2004.

Common names: Slickrock wild buckwheat
Endemic
Basionym: Eriogonum jamesii var. rupicola Reveal Phytologia. 25: 202. 1973
Treatment appears in FNA Volume 5. Treatment on page 369. Mentioned on page 370.

Plants spreading, compact mats, 2–6 (–8) dm wide. Aerial flowering-stems 0.3–1 dm. Leaf-blades elliptic, 0.5–1.2 × 0.5–0.8 cm. Inflorescences capitate, rarely umbellate; bracts 0.3–1 × 0.3–0.5 cm. Involucres 3–5 × 3–4 mm. Flowers 4–5 (–6) mm.


Phenology: Flowering Jun–Oct.
Habitat: Sandstone outcrops, ledges, and cliffs, blackbrush and sagebrush communities, oak and pinyon-juniper woodlands
Elevation: 1600-1900 m

Discussion

Variety rupicola is restricted to Zion National Park in Kane and Washington counties. It is marginally distinct from var. arcuatum.

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."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.

light-brown;brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
(Reveal) Reveal +
deciduous +  and persistent +
stipelike +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Eriogonum jamesii var. rupicola +
awn-tipped +  and simple +
greenish +  and grayish +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
floccose +  and tomentose +
oblong;elliptic +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not awn-tipped +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
Slickrock wild buckwheat +
1600-1900 m +
curved +  and straight +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
unisexual +  and bisexual +
attenuate +
0.4 cm4 mm <br />0.004 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 +
Sandstone outcrops, ledges, and cliffs, blackbrush and sagebrush communities, oak and pinyon-juniper woodlands +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
campanulate +
nonmembranous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5cm;0.8cm +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
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 /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
Harvard Pap. Bot. +
, +  and solid +
slender;stout +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 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 jamesii var. arcuatum +
chambered +  and solid +
slender +  and stout +
Eriogonum arcuatum var. rupicola +
Eriogonum arcuatum +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
lobed +  and laciniate +
coriaceous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +