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island buckwheat, Santa Cruz Island buckwheat, Santa Cruz Island wild buckwheat
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Gregg's buckwheat, Gregg's wild buckwheat
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| Shrubs, erect to spreading, 6–15(–20) × 5–30 dm, glabrous and cinereous, reddish. |
Herbs, polycarpic, 1–4 dm, glandular-puberulent; taproot not chambered. |
spreading to erect, occasionally with persistent leaf bases, up to 3/4 or more height of plant; caudex stems absent; aerial flowering stems erect, stout, solid, not fistulose, 0.5–1(–1.5) dm, glabrous. |
caudex absent or compact; aerial flowering stems usually 1, erect or nearly so, not fistulose, 0.5–1.5 dm, glandular-puberulent. |
cauline, 1 per node; petiole 0.1–0.5 cm, tomentose; blade linear to narrowly oblong, 2–4(–5) × 0.1–0.4(–0.6) cm, white-tomentose abaxially, cinereous to glabrate and greenish adaxially, margins often revolute. |
basal and cauline; basal petiolate, petiole often winged, 0.5–2 cm, hispid, blade elliptic to broadly spatulate, 2–6(–10) × 0.5–2(–2.5) cm, hispid and uniformly stipitate-glandular on both surfaces or glabrous except for ciliate midvein and margin; cauline sessile, blades in whorls of 3–10 per node, oblanceolate, obovate, or spatulate, 0.5–4 × 0.2–1.5(–2) cm, similar to basal blade except more hispid and less glandular adaxially than abaxially, or glabrous except for ciliate midvein and margins. |
cymose, 5–10 × 5–15(–20) cm; branches dichotomous, glabrous; bracts 1–3, leaflike, lanceolate to oblong, 0.5–2 × 0.3–1.5 cm. |
1–3 × 1–3 dm; branches glandular-puberulent; bracts semileaflike to scalelike, 3–15 × 1–3(–5) mm. |
absent or erect, stout, 0.1–0.5 cm, cinereous. |
ascending to erect, straight or slightly curving upward, 1–6(–7) cm, glandular and hispid. |
1 per node, campanulate, 2–3 × 2.5–4 mm, cinereous; teeth 5–7, erect, 0.5–1.5 mm. |
campanulate, 1.5–3 × 3–5 mm, slightly to densely strigose and glandular; teeth 1–1.5 mm. |
2–3.5(–4) mm; perianth white to pinkish, villous abaxially; tepals connate proximally, monomorphic, oblanceolate to narrowly obovate; stamens exserted, 3–5 mm; filaments glabrous. |
1.5–2.5 mm in anthesis, 2.5–3.5 mm in fruit; perianth yellowish white with prominent reddish brown to brown midribs and bases, becoming more reddish in fruit, strigose abaxially; tepals lanceolate to oblong; stamens 1.5–2 mm; filaments glabrous. |
brown, 2.5–3.5 mm, glabrous. |
reddish brown, 3–4 mm, 3-ridged distally, short-beaked, glabrous. |
= 40. |
= 32. |
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| Flowering Apr–Oct. |
Flowering Jul–May. |
| Rocky slopes and canyon walls, coastal scrub communities |
Calcareous flats and slopes, mixed grassland, creosote bush, and saltbush communities |
| 10-600 m (0-2000 ft) |
50 m (200 ft) |
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CA
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TX; Mexico (Coahuila, Nuevo León) |
Of conservation concern. Eriogonum arborescens is local and occasionally rare on Santa Cruz, Santa Rosa, and Anacapa islands in Santa Cruz and Ventura counties. The species is cultivated, and populations have become naturalized on the mainland from San Mateo County south to San Diego, in large part because of planting along highways. Every effort should be made to remove these naturalized populations from the mainland. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Eriogonum greggii just enters the flora area in Hildago and Starr counties, where it is rare. In Mexico, the plants occur in Coahuila and Nuevo León, nearly always below 1850 m. There, Gregg’s wild buckwheat occasionally is found in montane conifer woodlands. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 5, p. 302. |
FNA vol. 5, p. 377. |
| Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eucycla |
Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Pterogonum |
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. 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. 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. 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. ciliatum var. foliosum |
| Greene: Bull. Calif. Acad. Sci. 1: 11. (1884) |
Torrey & A. Gray: Proc. Amer. Acad. Arts 8: 187. (1870) |
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CA
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