Eriogonum sphaerocephalum Douglas ex Benth.

Rock buckwheat (en)

Species

Angiosperms > Caryophyllales > Polygonaceae > Eriogonum

Characteristics

Subshrubs, spreading to erect, infrequently polygamodioecious, 0.5-4 × 3-5(-6) dm, floccose or glabrous. Stems: caudex spread-ing; aerial flowering stems erect, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, non-flowering aerial branches, (0.3-)0.5-1 dm, thinly floccose or glabrous, with a whorl of 4-8 leaflike bracts ca. midlength or proximally, linear-oblanceolate to oblanceolate, 1-2 × 0.1-0.4 cm. Leaves in loose to congested basal rosettes; petiole 0.05-0.3 cm, floccose or glabrous; blade linear-oblanceolate, narrowly oblanceolate, or narrowly spatulate, 1-3(-4) × (0.1-)0.3-0.6(-1) cm, lanate or tomentose to floccose or glabrous, margins entire, plane or revolute. Inflorescences capitate, compound-umbellate, or umbellate, 1-2 cm wide or 1-5 × 1-5 cm; branches thinly floccose or glabrous; bracts absent immediately below involucre. Involucres 1 per node, turbinate-campanulate to campanulate, 3-4 × 2.5-4.5 mm; teeth 6-10, lobelike, slightly reflexed, 1.5-3(-5) mm. Flowers (5-)6-9 mm, including 1-2 mm stipelike base; perianth pale to bright yellow or cream to ochroleucous, villous abaxially; tepals monomorphic, obovate to oblong-ovate; stamens exserted, 4-6 mm; filaments pilose proximally. Achenes light brown, 3-4 mm, glabrous except for sparsely pubescent beak.
Life form perennial
Growth form shrub
Growth support -
Foliage retention deciduous
Sexuality polygamodioecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.05 - 0.4
Root system -
Rooting depth (meter) 0.4
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-8
Soil humidity 1-3
Soil texture 5-6
Soil acidity 5-9
Soil nutriment -
Hardiness (USDA) 4-10

Usage

Uses medicinal
Edible -
Therapeutic use Antidiarrheal (root), Cold Remedy (root)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Eriogonum sphaerocephalum leaf picture by Ethan Greer (cc-by-sa)

Flower

Eriogonum sphaerocephalum flower picture by Ethan Greer (cc-by-sa)

Distribution

Eriogonum sphaerocephalum world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:694433-1
WFO ID wfo-0000675450
COL ID 3B4WK
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Eriogonum sphaerocephalum Eriogonum fasciculifolium Eriogonum geniculatum Eriogonum ellipticum var. megacephalum Eriogonum sphaerocephalum var. brevifolium Eriogonum sphaerocephalum var. fasciculifolium Eriogonum sphaerocephalum var. geniculatum Eriogonum sphaerocephalum var. megacephalum Eriogonum sphaerocephalum subsp. megacephalum Eriogonum sphaerocephalum var. sphaerocephalum

Lower taxons

Eriogonum sphaerocephalum var. halimioides Eriogonum sphaerocephalum var. sublineare