Eriogonum allenii

S. Watson in A. Gray et al.

in A. Gray et al., Manual ed. 6, 734. 1890.

Common names: Shale barren wild buckwheat
Endemic
Treatment appears in FNA Volume 5. Treatment on page 371. Mentioned on page 333, 370.

Herbs, erect, 3–5 (–7) × 0.5–1 dm, tomentose. Stems: caudex absent; aerial flowering-stems erect, stout, solid, not fistulose, arising directly from a taproot, 2–4 dm, tomentose. Leaves basal, not in rosettes; petiole 5–15 cm, tomentose to floccose; blade oblong to ovate, (5–) 10–15 × 4–8 cm, densely brownish-white-tomentose abaxially, floccose or glabrous and green adaxially, margins entire, plane. Inflorescences compound-umbellate, 10–40 (–50) × 8–30 (–50) cm; branches tomentose; bracts 3–6, leaflike at proximal node, 1–10 (–12) × 0.5–4 (–5) cm, often scalelike distally. Involucres 1 per node, campanulate, 3–5 (–7) × (4–) 5–8 mm, tomentose; teeth 5–7, erect or slightly spreading, 0.8–1.5 mm. Flowers 3–7 mm, including 1–1.5 mm stipelike base; perianth bright-yellow, densely pubescent abaxially; tepals dimorphic, those of outer whorl broadly lanceolate to elliptic, 3–6 × 1.5–3 mm, those of inner whorl elliptic to fan-shaped, 4–7 × 2.5–4 mm; stamens exserted, 3–5 (–7) mm; filaments pilose proximally. Achenes light-brown to brown, 4–6 mm, glabrous except for sparsely pubescent beak.


Phenology: Flowering Jun–Oct.
Habitat: Rocky shale slopes, oak and pine woodlands
Elevation: 400-800 m

Discussion

Eriogonum allenii is restricted to the Appalachian shale barrens of Virginia (Alleghany, Augusta, Bath, Botetourt, Craig, Frederick, Highland, Montgomery, and Shenandoah counties) and West Virginia (Greenbrier, Monroe, and Pendleton counties), where it is local and infrequent, and found in four geographic areas of concentration. The plants are protected at The Nature Conservancy’s Slaty Mountain site in Monroe County, West Virginia, and in Douthat State Park in Bath County, Virginia. The species occasionally is cultivated.

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.

... more about "Eriogonum allenii"
light-brown;brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
S. Watson in A. Gray et al. +
deciduous +  and persistent +
stipelike +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
awn-tipped +  and simple +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
glabrous +, floccose +  and brownish-white-tomentose +
oblong;ovate +
4cm;8cm +
not awn-tipped +
10 cm100 mm <br />0.1 m <br /> (12 cm120 mm <br />0.12 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
scabrellous +
spreading +  and erect +
spreading +  and erect +
whorled +, opposite +  and alternate +
Shale barren wild buckwheat +
Va. +  and W.Va. +
400-800 m +
curved +  and straight +
unisexual +  and bisexual +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
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 +
Rocky shale slopes, oak and pine woodlands +
compound-umbellate +
subcapitate +  and capitate +
40 cm400 mm <br />0.4 m <br /> (50 cm500 mm <br />0.5 m <br />) +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
campanulate +
nonmembranous +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
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 +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
in A. Gray et al., Manual ed. +
, +  and solid +
slender;stout +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
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 +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum allenii +
Eriogonum subg. Oligogonum +
species +
emarginate +  and entire +
1/4 +  and 1/3 +
lobed +  and laciniate +
coriaceous +
spreading +  and erect +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 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 +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +