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Esmeralda buckwheat, Esmeralda wild buckwheat

Temblor buckwheat, Temblor wild buckwheat

Habit Herbs, erect to spreading, annual, (0.5–)1–5(–10) dm, glabrous or glandular proximally, mostly grayish. Herbs, erect, 1–8 dm, tomentose, greenish gray to gray.
Stems

caudex absent;

aerial flowering stems erect, solid, not fistulose, 0.5–1(–3) dm, glabrous or sparsely glandular proximally.

aerial flowering stems erect, 0.5–1(–1.5) dm, tomentose.

Leaves

basal;

petiole 0.5–4 cm, strigose to hispid;

blade obovate to round-ovate, 0.5–2.5 × 0.4–2 cm, sparsely strigose to pilose-hispid, often slightly glandular, grayish, greenish, or reddish on both surfaces, or reddish adaxially, margins plane.

basal and subbasal, rarely cauline;

petiole 2–5 cm, tomentose;

basal blade initially suborbiculate, then elliptic, 1.5–4 × 1–1.5 cm, rarely suborbiculate and 2–4 × 2–4 cm when first formed, densely tomentose on both surfaces, or slightly less so and grayish to greenish abaxially;

cauline blade similar to basal but not suborbiculate.

Inflorescences

cymose, open to diffuse, 5–40(–70) × 5–50 cm;

branches not fistulose, glabrous or sparsely glandular near proximal nodes;

bracts 3, scalelike, 0.5–3 × 0.5–2 mm.

cymose, open, 8–70 × 10–50 cm;

bracts 1–2.5 × 1–2 mm.

Peduncles

spreading to reflexed, straight, slender to filiform, 0.2–1.5 cm, glabrous.

erect, straight, slender, 1–4 cm, tomentose.

Involucres

narrowly turbinate, 0.8–1.8 × 0.5–1.2 mm, glabrous;

teeth 4–5, erect, 0.2–0.4 mm.

terminal at tips of slender branchlets proximally, not appressed to branches, turbinate, 2–2.5 × 1.5–2 mm, tomentose;

teeth 5, erect, 0.5–0.8 mm.

Flowers

1–3 mm;

perianth white to pinkish with greenish or reddish midribs, glabrous, minutely pustulose proximally;

tepals monomorphic, oblanceolate to oblong;

stamens included, 1–1.5(–1.8) mm;

filaments glabrous.

1.5–2.5 mm;

perianth white, glabrous;

tepals monomorphic, oblong;

stamens included, 1–1.5 mm;

filaments usually pilose proximally;

styles 0.2–1 mm.

Achenes

light brown, 3-gonous, 1.4–2.5 mm, glabrous.

light brown, 3-gonous, 2–2.8 mm;

beak granular.

2n

= 34.

Eriogonum esmeraldense

Eriogonum temblorense

Phenology Flowering May–Sep.
Habitat Sandy to loamy slopes, mixed grassland communities, oak and juniper woodlands
Elevation 300-900 m (1000-3000 ft)
Distribution
from FNA
CA; NV; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Eriogonum temblorense is rare but much more widely distributed than the closely related E. eastwoodianum. In early anthesis, it is difficult to differentiate between the two species, and plants gathered in May at Cottonwood Pass are particularly troublesome, as the first basal leaf blades are often suborbiculate. Those leaves quickly fall away, and the subsequent basal and cauline leaf blades are elliptic. As circumscribed here, E. temblorense is known from six sites in Monterey (Stone Canyon), San Luis Obispo (Cottonwood Pass and Polonio Pass areas), and Kern (Chico Martinez Canyon, Shale Hills, and hills west of McKittrick) counties.

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

Key
1. Flowering stems and inflorescence branches glabrous
var. esmeraldense
1. Flowering stems and inflorescence branches glandular to sparsely glandular proximally
var. toiyabense
Source FNA vol. 5, p. 392. FNA vol. 5, p. 418.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Ganysma Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oregonium
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. 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. 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. 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. esmeraldense var. esmeraldense, E. esmeraldense var. toiyabense
Name authority S. Watson: Proc. Amer. Acad. Arts 24: 85. (1889) J. T. Howell & Twisselmann: Leafl. W. Bot. 10: 42. (1963)
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