Flora of North America species comparison

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Eriogonum villiflorum

Eriogonum reniforme

dairyflower buckwheat, gray buckwheat, Gray's wild buckwheat

kidney leaf buckwheat, kidney-leaf wild buckwheat
Habit Herbs, matted, not scapose, 0.01–0.05 × 0.1–0.6 dm, villous to silky-tomentose, grayish. Herbs, spreading, annual, 0.5–4 dm, glabrous, greenish, grayish, or reddish.
Stems

matted, with persistent leaf bases, up to 1/8 height of plant;

caudex stems matted;

aerial flowering stems spreading to prostrate, slender, solid, not fistulose, (0.05–)0.15–0.5(–0.8) dm, villous to silky-tomentose.

caudex absent;

aerial flowering stems erect, solid, not fistulose, 0.2–0.8 dm, glabrous except for few hairs proximally.
Leaves

basal, fasciculate in terminal tufts;

petiole 0.05–0.1(–1.5) cm, silky-tomentose;

blade narrowly elliptic, 0.3–1 × 0.1–0.2(–0.3) cm, villous to silky-tomentose, margins plane.

basal;

petiole 0.5–6 cm, tomentose to floccose;

blade obovate or reniform to rounded, 0.5–2(–2.5) × 0.5–2 cm, densely white-tomentose abaxially, tomentose to subglabrous and grayish or greenish adaxially, margins plane.
Inflorescences

subcapitate or cymose-umbellate, 0.3–0.9 × 0.5–1.2(–2) cm;

branches dichotomous, villous to silky-tomentose;

bracts 4–8, semileaflike, linear-lanceolate to lanceolate, 2–6(–8) × 0.3–0.7(–1) mm.

cymose, open, 5–35 × 5–35 cm;

branches glabrous;

bracts 3, scalelike, 1–3 × 1–2 mm.
Peduncles

absent or erect, slender, 0.05–0.15 cm, villous to silky-tomentose.

erect, mostly curved, slender to capillary, 0.3–1.5 cm, glabrous.
Involucres

1 per node, campanulate, (3.5–)4–5 × (3.5–)4–5 mm, rigid, tomentose;

teeth 6–8(–13), spreading, 2–3 mm.

turbinate to turbinate-campanulate, 1.5–2(–2.2) × 1.5–2.5 mm, glabrous, glaucous;

teeth 5, erect, 0.5–0.8 mm.
Flowers

3–4.5 mm;

perianth white to rose, pilose;

tepals connate proximal 1/4, monomorphic, oblong to spatulate;

stamens exserted, 3–4 mm;

filaments glabrous proximally.

1–1.5 mm in early anthesis, becoming 1.5–2 mm;

perianth yellowish to yellow in early anthesis, becoming reddish, glandular;

tepals dimorphic, those of outer whorl broadly ovate, those of inner whorl oblong;

stamens exserted, 1.5–2.5 mm;

filaments pilose proximally.
Achenes

light brown, 2.5–3 mm, glabrous.

brown, lenticular, 0.8–1 mm, glabrous.
2n

= 32.

Eriogonum villiflorum

Eriogonum reniforme
Phenology Flowering Apr–Jul. Flowering Feb–Aug.
Habitat Gravelly to clayey flats and slopes, sagebrush communities, pinyon-juniper woodlands Sandy flats, washes, and slopes, saltbush, greasewood, creosote bush, and sagebrush communities, pinyon and/or juniper woodlands
Elevation 1500-2400 m (4900-7900 ft) 0-1700 m (0-5600 ft)
Distribution
from FNA
NV; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; NV; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Eriogonum villiflorum is probably more common than now documented, the plants being inconspicuous and easily overlooked. It is known from Eureka, Lincoln, northeastern Nye, and White Pine counties in eastern Nevada, and from Beaver, Iron, Juab, Kane, Millard, Sanpete, and Tooele counties in western Utah. The Kane County type location is questionable, as it is well outside the known range of the species today. The sprawling flowering stems with large clusters of involucres and flowers are distinctive. The species is occasionally encountered in cultivation as a rock-garden plant.

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

Eriogonum reniforme is infrequent to locally common throughout its range on the Mojave and Sonoran deserts in Arizona, southeastern California, and southern Nevada, where it extends northward along the Lahontan Trough onto the cold desert of the Great Basin. It is disjunct in the Tucson Mountains of Maricopa County, Arizona, and while specimens have not been collected there since 1906 (Thornber 5886, CAS, MO), the species recently was found north of Wickenburg (Welnick s.n., undated, ASU). It just enters Mexico, where it is rare.

Eriogonum reniforme is a food plant for the rare Mojave dotted-blue butterfly (Euphilotes mojave). The small blue (Philotiella speciosa) also feeds on these plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 285. FNA vol. 5, p. 404.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eucycla Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Ganysma
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. 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. 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. 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
Name authority A. Gray: Proc. Amer. Acad. Arts 8: 630. (1873) Torrey & Frémont: in J. C. Frémont, Rep. Exped. Rocky Mts., 317. (1845)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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