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corymbed wild buckwheat, crispleaf buckwheat, crispleaf wild buckwheat, white wild buckwheat
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Eastwood's buckwheat, Eastwood's wild buckwheat
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| Shrubs or subshrubs, spreading, rounded, occasionally erect, rarely somewhat matted, not scapose, (0.5–)1.5–8(–15) × (2–)3–15(–23) dm, grayish- to reddish-brown-tomentose to floccose or glabrous, grayish or greenish. |
Herbs, erect, 2–5 dm, tomentose, greenish gray to gray. |
spreading or erect, often with persistent leaf bases, up to 3/4 or more height of plant; caudex stems absent or somewhat matted; aerial flowering stems erect or nearly so, slender or occasionally stout, solid, not fistulose, (0.1–)1–2 dm, tomentose to floccose, occasionally glabrous. |
aerial flowering stems erect, (0.4–)0.8–1.5 dm, tomentose. |
cauline, 1 per node; petiole 0.1–1.5 cm, tomentose to floccose; blade lanceolate to oblanceolate or elliptic to nearly orbiculate, rarely cordate, (0.5–)1–3(–4.5) × (0.3–)0.5–3(–3.5) cm, densely white-, tannish- or brownish-tomentose on both surfaces or less so to nearly glabrous and green adaxially, margins occasionally crenulate. |
basal; petiole 2–8 cm, tomentose; blade suborbiculate, 1–3 × 1–3 cm, white-tomentose abaxially, subglabrous and greenish adaxially. |
cymose, rarely capitate or umbellate, diffuse to rather open, (1–)3–20 × 2–25(–30) cm; branches dichotomous, tomentose, floccose, or rarely glabrous; bracts 3, scalelike, usually triangular, and 1–3(–6) mm, or leaflike, 10–25 mm, and similar to leaf blades. |
cymose, open, 10–40 × 10–40 cm; branches tomentose; bracts 1–5(–6) × 1–2 mm. |
absent. |
erect, straight, slender, 1–3.5 cm, tomentose. |
1 per node, turbinate, (1–)1.5–3.5 × 1–2(–2.5) mm; teeth 5, erect, 0.3–1 mm. |
terminal at tips of slender branchlets at least proximally, not appressed to branches, turbinate, 2–2.5 × 1.5–2 mm, tomentose; teeth 5, erect, 0.6–0.9 mm. |
(1.5–)2–3.5 mm; perianth white to cream, pink, or pale yellow to yellow, glabrous or rarely sparsely pilose; tepals connate proximal 1/4–1/3, essentially monomorphic, oblanceolate to spatulate; stamens included to slightly exserted, 1–4(–5) mm; filaments typically pilose proximally. |
1.5–2.5(–3) mm; perianth white, glabrous; tepals monomorphic, elliptic to oblong-obovate; stamens included, 0.7–1.2 mm; filaments usually pilose proximally; styles 0.1–0.3 mm. |
brown, 2–2.5(–3) mm, glabrous except for occasional papillate beak. |
brownish, 3-gonous, 1.6–2(–2.5) mm; beak granular. |
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= 34. |
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Flowering May–Sep. |
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Sandy shale outcrops and slopes, mixed grassland communities, oak and pine woodlands |
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(200-)500-1000 m ((700-)1600-3300 ft) |
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AZ; CO; NM; NV; TX; UT; WY
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CA |
Varieties 8 (8 in the flora). Eriogonum corymbosum is a difficult complex of overlapping expressions, some of which are maintained here as taxonomically significant. Although perianth color is used to group the varieties, this feature is not consistent even in single populations. Therefore, population trends in perianth color must be noted in the field. Most of the varieties are then distinguished on the basis of leaf characters, and again, considerable variation can be seen in some populations. Still, the combination of flower color, leaf features, and geographic distribution should prove useful in distinguishing the varieties. S. L. Welsh et al. (2003) alluded to hybrid combinations involving Eriogonum corymbosum and other species. Aside from the instances involving E. brevicaule, discussed below, none has been confirmed. Most of the putative hybrids are misidentified specimens of E. lonchophyllum or collections of var. corymbosum in which the leaf-margins are not decidedly crisped, a feature usually seen only in fully mature plants. Eriogonum corymbosum was widely used by Native Americans. P. A. Vestal (1940) reported that the Hopi pressed boiled stalks into cakes that, when dried, were eaten with salt. J. W. Fewkes (1896) indicated that boiled leaves were mixed with cornmeal and water, and then baked into a kind of bread. S. A. Weber and P. D. Seaman (1985) indicated that A. F. Whiting was aware of a decoction of leaves (probably from var. glutinosum) being used for headaches. Variety glutinosum also was used primarily to treat tuberculosis, or at least as a cough medicine (D. E. Moerman 1986). Some of the expressions of Eriogonum corymbosum are attracting the interest of gardeners, a few are coming into cultivation, and several selections are now being developed. The plants are slow growing but can be transplanted with some degree of success. Members of the varieties are food plants for Ellis’s dotted-blue butterfly (Euphilotes ellisi). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Eriogonum eastwoodianum is rare and known only from two disjunct locations in Fresno County, one in the Silver Creek Canyon area and the other above Jacalitos Ranch on Parkfield Grade. Plants from a third site in the Cottonwood Pass area of San Luis Obispo County are now assigned to E. temblorense. That species and E. vestitum are closely related to E. eastwoodianum, and only fully mature plants can be assigned unquestionably to one of those species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
1. Perianths usually pale yellow to yellow, occasionally white; s Utah, n Arizona, se Nevada | → 2 |
1. Perianths white to cream or pink; sw Wyoming s through e Utah and w Colorado to nw New Mexico and Arizona | → 4 |
2. Inflorescence branches glabrous or nearly so; sw Utah | var. aureum |
2. Inflorescence branches tomentose to floccose | → 3 |
3. Leaf blades greenish-floccose adaxially; Colorado Plateau, n Arizona, s Utah | var. glutinosum |
3. Leaf blades silvery-floccose adaxially; Mojave Desert, se Nevada, sc Utah | var. nilesii |
4. Leaf blades elliptic-oblong to nearly orbiculate, 1-3(-3.5) × 1-2.5(-3.5) cm | → 5 |
4. Leaf blades lanceolate to oblanceolate or elliptic, (0.5-)1-3(-4.5) × (0.3-)0.5-1.5 cm | → 6 |
5. Leaf blades elliptic-oblong to oblong or ovate, rarely cordate, densely white- to tan-lanate or less so to brownish-floccose adaxially; plants brownish-white- tomentose; flowers 2-2.5(-3) mm | var. velutinum |
5. Leaf blades usually broadly ovate to nearly orbiculate, densely grayish-tomentose abaxially, sometimes tomentose to floccose on both surfaces, or more often subglabrous or glabrous and green adaxially; plants greenish-tomentose; flowers 2.5-3 mm | var. orbiculatum |
6. Plants sprawling subshrubs, 0.5-1.5 dm, occasionally shrubs, 2-4.5 dm; leaf blades 0.5-2 × 0.3-0.6(-0.8) cm; subalpine in bristlecone pine communities | var. heilii |
6. Plants erect subshrubs or shrubs, 3-10 dm; leaf blades 1-3(-4.5) × (0.3-)0.5-1.5 cm; desert scrub to montane forest communities | → 7 |
7. Leaves cauline 2 or more length of flowering stems; n Arizona, w Colorado, e and s Utah, sw Wyoming | var. corymbosum |
7. Leaves cauline 4 or less length of flowering stems; c and e Utah | var. revealianum |
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| FNA vol. 5, p. 255. |
FNA vol. 5, p. 417. |
| Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eucycla |
Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oregonium |
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. 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. 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. 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. 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 |
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| E. effusum subsp. corymbosum |
E. covilleanum subsp. adsurgens, E. truncatum var. adsurgens, E. vimineum subsp. adsurgens |
| Bentham: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 17. (1856) |
J. T. Howell: Leafl. W. Bot. 2: 133. (1938) |
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