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bractless parsnip-flower wild buckwheat, parsnip-flower buckwheat, parsnip-flower eriogonum, parsnip-flower wild buckwheat, whorled buckwheat, whorled wild buckwheat, Wyeth wild buckwheat, Wyeth's buckwheat

Habit Herbs, spreading mats, infrequently polygamodioecious, 1–6 × 2–10, tomentose to floccose.
Stems

caudex spreading;

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(–4) dm, often with a whorl of (2–)5–10, linear to oblanceolate, leaflike bracts ca. midlength, 0.5–4(–5) × 0.2–1 (1.5) cm, mostly tomentose to floccose.

Leaves

in loose rosettes;

petiole 0.5–3 cm, usually floccose;

blade usually linear to oblanceolate, (1.5–)2–5 × 0.2–1(–1.5) cm, densely white-lanate to tomentose on both surfaces or only abaxially, thinly floccose or glabrous and green adaxially, margins entire, plane.

Inflorescences

simple or compound-umbellate, rarely reduced and compact, 1–10 × 1–10 cm;

branches tomentose to floccose;

bracts 3–10 or more, leaflike at proximal node, oblanceolate to linear, 0.3–1 × 0.2–0.4 cm, usually scalelike distally, 1–5 × 0.5–2.5 mm.

Involucres

1 per node, turbinate to campanulate, 3–4.5 × 2.5–5(–6) mm, tomentose, rarely glabrous;

teeth 6–12 or more, lobelike, reflexed, 1.5–5 mm.

Flowers

4–9 mm, including 1.5–3 mm stipelike base;

perianth white to cream or ochroleucous, glabrous;

tepals monomorphic, spatulate to oblong-ovate;

stamens exserted, 4–8 mm;

filaments pilose proximally.

Achenes

light to dark brown, (2–)3.5–5 mm, glabrous except for sparsely pubescent beak.

Eriogonum heracleoides

Distribution
from FNA
CA; CO; ID; MT; NV; OR; UT; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

According to N. J. Turner et al. (1980), plants of the narrow-leaved phase (var. angustifolum) were used for colds, tuberculosis, and other lung ailments, and to treat infected cuts and sores (a decoction of roots and stems). V. F. Ray (1933) reported that a decoction of roots of such plants was taken for diarrhea. E. V. Steedman (1930) said that they were taken for stomachaches, used in steambaths to treat aching joints and muscles, and had a role in a purifying ceremony held in sweatlodges. Steedman also indicated that a strong decoction was taken by the Thompson Indians to treat syphilis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Flowering stems with a distinct whorl of leaflike bracts ca. midlength
var. heracleoides
1. Flowering stems bractless, or with 1 leaflike bract ca. midlength
var. leucophaeum
Source FNA vol. 5, p. 353.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum
Sibling taxa
E. abertianum, E. acaule, E. alatum, E. aliquantum, E. allenii, E. alpinum, E. ammophilum, E. ampullaceum, E. androsaceum, E. anemophilum, E. angulosum, E. annuum, E. apiculatum, E. apricum, E. arborescens, E. arcuatum, E. aretioides, E. argillosum, E. argophyllum, E. arizonicum, E. artificis, E. atrorubens, E. baileyi, E. batemanii, E. bicolor, E. bifurcatum, E. brachyanthum, E. brachypodum, E. brandegeei, E. breedlovei, E. brevicaule, E. butterworthianum, E. caespitosum, E. capillare, E. cernuum, E. chrysops, E. cinereum, E. cithariforme, E. clavatum, E. clavellatum, E. codium, E. collinum, E. coloradense, E. compositum, E. concinnum, E. congdonii, E. contiguum, E. contortum, E. correllii, E. corymbosum, E. covilleanum, E. crocatum, E. cronquistii, E. crosbyae, E. cusickii, E. darrovii, E. dasyanthemum, E. davidsonii, E. deflexum, E. deserticola, E. desertorum, E. diatomaceum, E. diclinum, E. divaricatum, E. douglasii, E. eastwoodianum, E. effusum, E. elatum, E. elegans, E. elongatum, E. ephedroides, E. eremicola, E. eremicum, E. ericifolium, E. esmeraldense, E. evanidum, E. exaltatum, E. exilifolium, E. fasciculatum, E. flavum, E. fusiforme, E. giganteum, E. gilmanii, E. glandulosum, E. gordonii, E. gossypinum, E. gracile, E. gracilipes, E. gracillimum, E. grande, E. greggii, E. gypsophilum, E. havardii, E. heermannii, E. helichrysoides, E. hemipterum, E. hieracifolium, E. hirtellum, E. hirtiflorum, E. hoffmannii, E. holmgrenii, E. hookeri, E. howellianum, E. hylophilum, E. incanum, E. inerme, E. inflatum, E. intrafractum, E. jamesii, E. jonesii, E. kelloggii, E. kennedyi, E. kingii, E. lachnogynum, E. lancifolium, E. latens, E. latifolium, E. lemmonii, E. leptocladon, E. leptophyllum, E. libertini, E. lobbii, E. loganum, E. lonchophyllum, E. longifolium, E. luteolum, E. maculatum, E. mancum, E. marifolium, E. mensicola, E. microthecum, E. mitophyllum, E. mohavense, E. molestum, E. mortonianum, E. multiflorum, E. natum, E. nealleyi, E. nervulosum, E. nidularium, E. niveum, E. nortonii, E. novonudum, E. nudum, E. nummulare, E. nutans, E. ochrocephalum, E. ordii, E. ostlundii, E. ovalifolium, E. palmerianum, E. panamintense, E. panguicense, E. parishii, E. parvifolium, E. pauciflorum, E. pelinophilum, E. pendulum, E. pharnaceoides, E. plumatella, E. polycladon, E. polypodum, E. prattenianum, E. prociduum, E. pulchrum, E. pusillum, E. pyrolifolium, E. racemosum, E. reniforme, E. ripleyi, E. rixfordii, E. robustum, E. rosense, E. roseum, E. rotundifolium, E. rubricaule, E. rupinum, E. salicornioides, E. saxatile, E. scabrellum, E. scopulorum, E. shockleyi, E. siskiyouense, E. smithii, E. soliceps, E. soredium, E. spathulatum, E. spectabile, E. spergulinum, E. sphaerocephalum, E. strictum, E. subreniforme, E. suffruticosum, E. temblorense, E. tenellum, E. ternatum, E. terrenatum, E. thomasii, E. thompsoniae, E. thornei, E. thurberi, E. thymoides, E. tiehmii, E. tomentosum, E. trichopes, E. tripodum, E. truncatum, E. tumulosum, E. twisselmannii, E. umbellatum, E. ursinum, E. vestitum, E. villiflorum, E. vimineum, E. viridescens, E. viridulum, E. viscidulum, E. visheri, E. watsonii, E. wetherillii, E. wootonii, E. wrightii, E. zionis
Subordinate taxa
E. heracleoides var. heracleoides, E. heracleoides var. leucophaeum
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 49, plate 7. (1834)
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