Antelope sage, James' buckwheat, James' wild buckwheat
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Thomas eriogonum, Thomas' buckwheat, Thomas' wild buckwheat
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Herbs or subshrubs, compact or spreading, matted, 0.5–2.5 × 3–15 dm, tomentose to floccose. |
Herbs, spreading, annual, 0.5–3 dm, glabrous, greenish, sometimes grayish or reddish. |
caudex absent or spreading; aerial flowering stems erect, slender, solid, not fistulose, usually arising directly from a taproot, 0.5–1.5 dm, tomentose to floccose. |
caudex absent; aerial flowering stems erect, solid, not fistulose, 0.2–1 dm, glabrous except for few glands proximally. |
basal, typically not in rosettes; petiole 0.5–6 cm, tomentose to floccose; blade usually narrowly elliptic, 1–3(–3.5) × (0.3–)0.5–1(–1.2) cm, densely tomentose abaxially, thinly tomentose, floccose or glabrous and grayish to greenish adaxially, margins entire, plane or undulate and crisped. |
basal; petiole 0.5–3 cm; blade round to round-reniform, 0.5–2 × 0.5–2 cm, densely white-tomentose abaxially, floccose to glabrate and greenish adaxially, margins plane. |
umbellate or compound-umbellate, 10–30 × 10–25 cm; branches tomentose to floccose; bracts 3–9, semileaflike at proximal node, 0.5–2 × 0.2–1 cm, often scalelike distally. |
cymose, open to diffuse, 5–25 × 5–25 cm; branches glabrous; bracts 3, scalelike, 1–2.5 × 1–2 mm. |
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capillary, spreading to slightly recurved, straight or curved, capillary, 0.5–3 cm, glabrous. |
1 per node, turbinate, 1.5–7 × 2–5 mm, tomentose to floccose; teeth 5–8, erect, 0.1–0.5 mm. |
turbinate-campanulate, 0.6–1.2 × 0.7–1.3 mm, glabrous; teeth 5, erect, 0.4–0.6 mm. |
3–8 mm, including 0.7–2 mm stipelike base; perianth white to cream, densely pubescent abaxially; tepals dimorphic, those of outer whorl lanceolate to elliptic, 2–5 × 1–3 mm, those of inner whorl lanceolate to fan-shaped, 1.5–6 × 2–4 mm; stamens exserted, 2–4 mm; filaments pilose proximally. |
0.8–1 mm in early anthesis, becoming 1.2–2 mm; perianth yellow in early anthesis, becoming white to rose, short-hispidulous; tepals dimorphic, those of outer whorl cordate, becoming saccate-dilated proximally, those of inner whorl spatulate; stamens included, 0.5–0.9 mm; filaments mostly glabrous. |
light brown to brown, 4–5 mm, glabrous except for sparsely pubescent beak. |
brown to dark brown, usually lenticular, 0.8–1 mm, glabrous. |
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= 40. |
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Flowering year-round. |
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Sandy flats, washes, and slopes, saltbush, greasewood, creosote bush, and sagebrush communities, pinyon and/or juniper woodlands |
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-70-1200(-1400) m (-200-3900(-4600) ft) |
AZ; CO; KS; NM; OK; TX; including Mexico
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AZ; CA; NV; UT; Mexico (Baja California, Sonora)
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Varieties 3 (3 in the flora). Eriogonum jamesii is a nectar source for the rare Spalding dotted-blue butterfly (Euphilotes spaldingi). Eriogonum jamesii and E. arcuatum (see below) are considered “life medicines” and used ceremonially by Native Americans (C. Arnold, pers. comm.; A. B. Reagan 1929; P. A. Vestal 1952). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Eriogonum thomasii is common to abundant and even weedy throughout its range on the Mojave and Sonoran deserts in Arizona, southeastern California, southern Nevada, and southwestern Utah. The distinctive swollen bases of the outer tepals are easy to observe in fruiting material but not always obvious in early anthesis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
1. Leaf margins undulate, frequently crisped; flowers 3-5(-6) mm; se Arizona, s New Mexico, sw Texas | var. undulatum |
1. Leaf margins plane, not crisped; flowers 4-8 mm; e Arizona, c and s Colorado, wc Kansas, New Mexico, w Oklahoma, n and w Texas | → 2 |
2. Inflorescences compound-umbellate; e Arizona, c and s Colorado, New Mexico, w Oklahoma, n and w Texas | var. jamesii |
2. Inflorescences simple-umbellate; wc Kansas | var. simplex |
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FNA vol. 5, p. 367. |
FNA vol. 5, p. 404. |
Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum |
Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Ganysma |
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. heracleoides, 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. 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 |
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. heracleoides, 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. 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 |
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Bentham: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 7. (1856) |
Torrey: in War Department [U.S.], Pacif. Railr. Rep. 5(2): 364. (1857) |
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