Flora of North America species comparison

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Eriogonum jamesii

Eriogonum eastwoodianum

Antelope sage, James' buckwheat, James' wild buckwheat

Eastwood's buckwheat, Eastwood's wild buckwheat
Habit Herbs or subshrubs, compact or spreading, matted, 0.5–2.5 × 3–15 dm, tomentose to floccose. Herbs, erect, 2–5 dm, tomentose, greenish gray to gray.
Stems

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.

aerial flowering stems erect, (0.4–)0.8–1.5 dm, tomentose.
Leaves

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 2–8 cm, tomentose;

blade suborbiculate, 1–3 × 1–3 cm, white-tomentose abaxially, subglabrous and greenish adaxially.
Inflorescences

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, 10–40 × 10–40 cm;

branches tomentose;

bracts 1–5(–6) × 1–2 mm.
Peduncles

erect, straight, slender, 1–3.5 cm, tomentose.
Involucres

1 per node, turbinate, 1.5–7 × 2–5 mm, tomentose to floccose;

teeth 5–8, erect, 0.1–0.5 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.
Flowers

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.

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.
Achenes

light brown to brown, 4–5 mm, glabrous except for sparsely pubescent beak.

brownish, 3-gonous, 1.6–2(–2.5) mm;

beak granular.
2n

= 34.

Eriogonum jamesii

Eriogonum eastwoodianum
Phenology Flowering May–Sep.
Habitat Sandy shale outcrops and slopes, mixed grassland communities, oak and pine woodlands
Elevation (200-)500-1000 m ((700-)1600-3300 ft)
Distribution
from FNA
AZ; CO; KS; NM; OK; TX; including Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

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 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.)
Key
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
Source FNA vol. 5, p. 367. FNA vol. 5, p. 417.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum 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. 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. 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
Subordinate taxa
E. jamesii var. jamesii, E. jamesii var. simplex, E. jamesii var. undulatum
Synonyms E. covilleanum subsp. adsurgens, E. truncatum var. adsurgens, E. vimineum subsp. adsurgens
Name authority Bentham: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 7. (1856) J. T. Howell: Leafl. W. Bot. 2: 133. (1938)
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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