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few-flower wild buckwheat, fewflower buckwheat, manybranch eriogonum
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acorn buckwheat, glandular buckwheat, glandular wild buckwheat
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| Herbs, loosely matted, usually scapose, 0.5–2 × 0.5–3 dm, tomentose, grayish. |
Herbs, spreading, annual, (0.5–) 1–2.5 dm, glandular, greenish or reddish green. |
spreading, usually with persistent leaf bases, up to 1/4 height of plant; caudex stems matted; aerial flowering stems scapelike, erect or nearly so, slender, solid, not fistulose, 0.3–2 dm, tomentose. |
caudex absent; aerial flowering stems erect, solid, not fistulose, 0.3–0.7 dm, glandular. |
fasciculate in terminal tufts, sometimes 1 per node and sheathing up stem 1–5 cm; petiole 1–5 cm, tomentose to lanate; blade linear-oblanceolate to oblanceolate or narrowly spatulate to elliptic, 1–4 × 0.1–1 cm, grayish- or whitish-tomentose abaxially, less so to subglabrous (or rarely glabrous) adaxially or white-lanate on both surfaces, margins plane. |
basal, often sheathing up stem 1–2 cm; petiole 0.3–2 cm, glandular; blade broadly elliptic to oval, 0.5–1.5 × 0.5–1.5 cm, pilose-hirsutulous, slightly glandular and greenish on both surfaces, margins entire. |
capitate, subcapitate, or cymose-umbellate, 1–5 × 1–2 cm; branches absent or dichotomous; bracts 2–6, linear to lanceolate, scalelike to semileaflike, 1.5–20 × 1–5 mm. |
cymose, diffuse, spreading and usually flat-topped, 5–20 × 5–30 cm; branches not fistulose, glandular; bracts 3, scalelike, 0.8–1.2 × 0.5–1 mm. |
absent. |
deflexed or nearly so, straight, slender, 0.2–0.5 cm at proximal nodes, 0.01–0.1 cm distally, sparsely glandular nearly entire length. |
1 per node or 2–5(–7) per cluster, narrowly turbinate, (3.5–)4–5 × (1.5–)2–3 mm, rigid, floccose to tomentose; teeth 5, erect, 0.5–0.8 mm. |
narrowly turbinate, 0.8–1.2(–1.5) × 0.6–1(–1.3) mm, glabrous; teeth 5, erect, 0.3–0.5 mm. |
2–2.5 mm; perianth whitish brown to rose, pubescent, rarely glabrous; tepals connate proximal 1/3, monomorphic, oblong; stamens exserted, 2.5–3 mm; filaments pilose proximally. |
1–1.8 mm; perianth white to pinkish with dark reddish brown to red midribs, densely pilose; tepals monomorphic, narrowly lanceolate; stamens exserted, 1–1.5 mm; filaments glabrous. |
light brown to brown, 2–2.5 mm, glabrous. |
black, 3-gonous, 1–1.3 mm, glabrous. |
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| Flowering May–Sep. |
Flowering May–Nov. |
| Clay to gravelly flats, washes, and slopes, grassland and sagebrush communities, juniper woodlands |
Sandy to gravelly, often calcareous slopes, saltbush and creosote bush communities |
| 600-1800 m (2000-5900 ft) |
900-1600 m (3000-5200 ft) |
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CO; MT; ND; NE; SD; WY; MB; SK
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CA; NV |
Eriogonum pauciflorum is the common, matted wild buckwheat on the Great Plains. The species occurs in southern Manitoba and Saskatchewan, northeastern Colorado, Montana, western Nebraska, North Dakota, Nebraska, South Dakota, and Wyoming. Plants from southeastern Wyoming, northeastern Colorado and western Nebraska have somewhat broader leaf blades (spatulate to elliptic rather than linear-oblanceolate to oblanceolate) that are densely tomentose to lanate on both surfaces (rather than loosely tomentose abaxially and less so or glabrous adaxially). Such plants have been distinguished as var. gnaphalodes. This expression would be worthy of a place in the rock garden. A hybrid between var. pauciflorum and E. effusum has been named E. ×nebraskense Rydberg (see 2. E. effusum). The hybrid is known from Weld County, Colorado, Cheyenne, Dawes, Kimball, and Sioux counties, Nebraska, and Converse and Platte counties, Wyoming. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Eriogonum glandulosum is a localized species that varies from rare to common in southeastern Inyo and extreme northeastern San Bernardino counties, California, and in southern Nye, northern Clark, and southwestern Lincoln counties, Nevada. The name E. glandulosum may not be the earliest for the taxon. The type of E. cordatum Torrey & Frémont (1845, as “cordalum”) was collected by Frémont most likely near the California-Nevada border, where E. trichopes, E. contiguum, and E. glandulosum occur. Because the description is not decisive, and because J. Torrey and A. Gray (1870) reported the type as missing, it is impossible to place the name unequivocally. Nonetheless, E. cordatum was reported to be glandular (“glaneous”) with the leaves “pubescent above, hairy underneath.” The glandular condition probably eliminates E. trichopes, while those leaf features probably exclude E. contiguum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 5, p. 284. |
FNA vol. 5, p. 389. |
| Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eucycla |
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. 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. 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. 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. 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. depauperatum, E. gnaphalodes, E. multiceps, E. pauciflorum var. gnaphalodes |
Oxytheca glandulosa, E. carneum, E. glandulosum var. carneum, E. trichopes subsp. glandulosum |
| Pursh: Fl. Amer. Sept. 2: 735. (1813) |
(Nuttall) Nuttall ex Bentham: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 21. (1856) |
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