Eriogonum crocatum

Davidson

Bull. S. Calif. Acad. Sci. 23: 17, plate E. 1924.

Common names: Saffron wild buckwheat
EndemicConservation concern
Synonyms: Eriogonum saxatile var. crocatum (Davidson) Munz
Treatment appears in FNA Volume 5. Treatment on page 325. Mentioned on page 225.

Herbs, erect to spreading, not scapose, 3–5 × 5–10 dm, lanate to tomentose. Stems spreading, usually without persistent leaf-bases, up to 1/4 height of plant; caudex stems matted to spreading; aerial flowering-stems spreading to erect, slender, solid, not fistulose, 0.2–1 dm, lanate to tomentose. Leaves cauline, 1 per node; petiole 0.3–1.2 cm tomentose; blade broadly ovate, 1–3 (–3.5) × 0.8–2.5 (–3) cm, lanate to tomentose. Inflorescences cymose-umbellate, 0.5–3 × 3–8 cm; branches umbellate, lanate to tomentose; bracts 3, scalelike, triangular, 1–2.5 mm. Peduncles absent. Involucres 1 per node, broadly campanulate, 3–4 × 3–5 mm, tomentose; teeth 5–6, erect, 0.5–1 mm. Flowers 5–6 mm, including elongate, rounded, slightly winged, stipelike base; perianth bright-yellow, glabrous; tepals connate proximally, dimorphic, those of outer whorl narrowly oblong, 3–4 × 0.7–0.9 mm, those of inner whorl oblong to spatulate, 3.5–5 × 1–1.5 mm; stamens exserted, 3–5 mm; filaments pilose proximally. Achenes brown, 3-gonous, 2.5–3 mm. 2n = 40.


Phenology: Flowering Apr–Jul.
Habitat: Sandstone slopes, oak woodlands
Elevation: 60-200 m

Discussion

Of conservation concern.

Eriogonum crocatum is known only from the Conejo Grade area of the Santa Monica Mountains in Ventura County. A population in the Malibu Hills of Los Angeles County sampled by M. E. Jones (26 Apr 1926, DS, POM) has not been rediscovered. The species is rare, and the state of California considers it worthy of protection. Federal action has been long delayed. The species is widely cultivated and is one of the more popular wild buckwheats in the garden. Great care should be taken to prevent its escape from cultivation.

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.

... more about "Eriogonum crocatum"
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
Davidson +
deciduous +  and persistent +
stipelike +, rounded +  and elongate +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lanate +  and tomentose +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
not brittle +
spreading +  and erect +
lanate +  and tomentose +
scabrellous +
ridged +, angled +  and round +
whorled +, opposite +  and alternate +
Saffron wild buckwheat +
60-200 m +
unisexual +, , +  and bisexual +
not attenuate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 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 slopes, oak woodlands +
reduced +
capitate +  and subcapitate +
dense +  and diffuse +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 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 /> (0.5 cm5 mm <br />0.005 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
bright-yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering Apr–Jul. +
homostylous +  and 3-carpellate +
Bull. S. Calif. Acad. Sci. +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
decumbent to erect +  and prostrate +
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 saxatile var. crocatum +
chambered +  and solid +
slender +  and stout +
Eriogonum crocatum +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
in proximal 1/2 +  and connate +
0 +  and 1/2 +
lobed +  and laciniate +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
lanate +  and tomentose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +