Eriogonum fasciculatum

Eriogonum fasciculatum Bentham

California Buckwheat
Polygonaceae

Protologue: Trans. Linn. Soc. London 17: 411 (1836)

Pronunciation: E-ri-ó-go-num fas-ci-cu-là-tum
Etymology: Gr. erion, wool + gonu, knee, ref. to nodes of type species, Eriogonum tomentosum Michaux + "fascicled")

Jepson eFlora Treatment

SD County Synoptic Voucher: E. f. var. fasciculatum, E. f. var. foliolosum, E. f. var. polifolium

[Plants of San Diego County HOME]

Key to the varities of Eriogonum fasciculatum, from The Jepson eFlora. (Note: all but var. flavovirida in San Diego County)

   
    Leaves thinly white-tomentose abaxially, glabrous adaxially; flowers, involucres generally glabrous; plant generally decumbent; Central Coast, South Coast Ranges, South Coast,
        Channel Islands (Santa Catalina Island), Western Transverse Ranges, San Bernardino Mountains, Peninsular Ranges, Mojave Desert (se edge) ..... var. fasciculatum
    Leaves, flowers, involucres hairy, if ± glabrous then plant of deserts; plant erect to rounded; California Floristic Province, East of Sierra Nevada, D
        Leaves light yellow-green, glabrous or ± so adaxially; involucres, flowers glabrous or occasionally hairy; Desert ..... var. flavoviride
        Leaves dark green or ± gray, generally hairy adaxially; involucres, flowers hairy; California Floristic Province, East of Sierra Nevada, D
            Inflorescence open, mostly cyme-like; leaves densely white-tomentose abaxially, less so to green, sparsely tomentose adaxially, margins generally tightly rolled under;   
                Central Western California, Southwestern California, occasionally Northwestern California, Desert ..... var. foliolosum    
            Inflorescence head- to umbel-like (or cyme-like); leaves gray-hairy on both surfaces or densely gray-tomentose abaxially, gray-hairy adaxially, margins not or occasionally  
                 rolled under; San Joaquin Valley, Central Coast, Outer South Coast Ranges, s Sierra Nevada, Inner South Coast Ranges, e South Coast, Transverse Ranges,
                e Peninsular Ranges, San Jacinto Mountains, East of Sierra Nevada, Desert ..... var. polifolium



Distribution:
 
Left: CCH2 records of 3 varieties in San Diego County. Right: CCH2 records of 4 varieties in California. Click to see current herbarium records. 



Eriogonum fasciculatum var. fasciculatum in the field.
Eriogonum fasciculatum var. fasciculatum
Shrub, 2-3 feet tall. Two other varieties, E. f. var. foliolosum and E. f. var. polifolium, occur in San Diego County. See key above.


Eriogonum fasciculatum var. fasciculatum close-up
Eriogonum fasciculatum var. fasciculatum
Note short shoots (fascicles) with alternate-fasciculate leaf arrangement, leaves narrowly elliptic to linear
with revolute margins and whitish-tomentulose abaxial surface.


Eriogonum fasciculatum var. fasciculatum Inflorescence  Eriogonum fasciculatum var. fasciculatum Inflorescence close-up
Eriogonum fasciculatum var. fasciculatum
Left: Inflorescence. Right: Unit of fasciculate flowers, subtended by involucre.


  Eriogonum fasciculatum var. fasciculatum floewr close-up  Eriogonum fasciculatum var. fasciculatum Close-up of ovary longitudinal-section
Eriogonum fasciculatum
var. fasciculatum
Left: Flower close-up, showing 3 outer and 3 inner tepals, stamens, and coiled style of ovary.
Right: Close-up of ovary longitudinal-section, showing basal, orthotropous ovule.


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