Eriogonum prattenianum

Durand

J. Acad. Nat. Sci. Philadelphia, n. s. 3: 100. 1855.

Endemic
Treatment appears in FNA Volume 5. Treatment on page 359. Mentioned on page 332, 334.

Herbs or subshrubs, spreading and matted or rounded to erect, 1–5 × 3–5 dm, glabrous. Stems: caudex spreading to erect; aerial flowering-stems erect, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, (0.5–) 1–3 dm, glabrous, with a whorl of 3–6, leaflike bracts ca. midlength, similar to leaf-blades, 0.7–1 × 0.2–0.4 cm. Leaves in compact basal rosettes; petiole 0.1–0.5 cm, tomentose; blade elliptic to ovate, 0.5–1.5 (–2) × 0.2–0.7 cm, densely white-tomentose on both surfaces or sometimes subglabrous and pale green adaxially, margins entire, plane. Inflorescences capitate, 0.8–2 cm wide; branches absent; bracts absent immediately below involucre. Involucres 1 per node, campanulate, 3–4 × 3–8 mm, tomentose; teeth 8–10, occasionally lobelike, erect to reflexed, 1–3 mm. Flowers 3–8 mm, including 1–1.5 mm stipelike base; perianth yellow, glabrous; tepals monomorphic, spatulate to obovate; stamens exserted, 3–4 mm; filaments pilose proximally. Achenes light to rusty brown, 4–5 mm, glabrous.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Leaf blades tomentose on both surfaces; n and c Sierra Nevada, Nevada County to Mariposa County Eriogonum prattenianum var. prattenianum
1 Leaf blades tomentose abaxially, subglabrous adaxially; s Sierra Nevada, Madera and Fresnocounties Eriogonum prattenianum var. avium

"/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.

... more about "Eriogonum prattenianum"
light;rusty brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Durand +
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 +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
white-tomentose +
plane;elliptic;ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 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 +
spreading +  and erect +
whorled +, opposite +  and alternate +
curved +  and straight +
unisexual +  and bisexual +
attenuate +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decumbent to erect +  and prostrate +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not fistulose +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 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 /> (2 cm20 mm <br />0.02 m <br />) +
connate +  and free +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate +
nonmembranous +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
cauline +  and basal +
bractlike +
subglabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
homostylous +  and 3-carpellate +
J. Acad. Nat. Sci. Philadelphia, n. s. +
, +  and solid +
slender;stout +
persistent +
0.3 cm3 mm <br />0.003 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 +
chambered +  and solid +
slender +  and stout +
Eriogonum prattenianum +
Eriogonum subg. Oligogonum +
species +
emarginate +  and entire +
1/4 +  and 1/3 +
spatulate +  and obovate +
coriaceous +
erect +  and reflexed +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
subshrub +, matted +  and herb +
erect;spreading;erect;spreading +
synoecious +, monocarpic +, polycarpic +  and , +
midlength +
3 +, 2 +  and 1 +