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dogtongue buckwheat, sandhill wild buckwheat

Frisco buckwheat, Frisco wild buckwheat

Habit Herbs, 5–12 × 2–5 dm, white- to rufous-tomentose. Herbs, matted, scapose, 0.01–0.1 × 1–3 dm, densely white-tomentose, whitish.
Stems

matted, with persistent leaf bases, up to 1/5 height of plant;

caudex stems matted;

aerial flowering stems scapelike, erect, slender, solid, not fistulose, 0.02–0.15 dm, tomentose.

Aerial flowering stems

erect, 1.5–7 dm, rounded and smooth.

Leaves

petiole 2–7 cm;

blade oblong to elliptic or spatulate, 4–15 × 1.5–4 cm, densely tomentose abaxially, subglabrous or glabrous adaxially.

basal, fasciculate and sheathing nearly entire length of stem;

petiole 0.05–0.2(–0.3) cm, tomentose;

blade narrowly elliptic to narrowly oblong, 0.2–0.7 × (0.07–)0.1–0.25 cm, densely white-tomentose, margins plane.

Inflorescences

(3–)5–30 × 3–20 cm;

bracts 3–5, leaflike, ovate to elliptic, 1–6 × 0.5–2.5 cm proximally, semileaflike, usually elliptic, 4–30 × 1–20 mm distally.

capitate, 0.5–1 cm;

branches absent;

bracts 6–8, scalelike, lanceolate to narrowly triangular, 1.3–1.6 mm.

Peduncles

absent.

absent.

Involucres

turbinate-campanulate to campanulate, 3–4.5(–5) × 3–5 mm;

teeth 0.1–0.5 mm.

4–6 per cluster, turbinate, 2–2.5 × 1.3–1.5 mm, rigid;

teeth (4–)5, erect, 0.5–0.6 mm.

Flowers

8–13 mm, including 2.5–3.5(–4) mm stipelike base;

perianth cream to light tan, densely tannish- to rusty-lanate abaxially;

tepals dimorphic, those of outer whorl broadly lanceolate, 3–5 × 1.7–2.2 mm, those of inner whorl obovate to nearly orbiculate, 3–6 × 3–4 mm;

stamens 3.5–5 mm;

filaments pilose.

(1.5–)2–2.5 mm;

perianth white, glabrous;

tepals connate proximal 1/4, slightly dimorphic, oblanceolate to ovate or obovate, those of outer whorl 1.5–2 mm wide, those of inner whorl 1–1.5 mm wide;

stamens included, 2–2.5 mm;

filaments sparsely pubescent proximally.

Achenes

brown, 4.5–5 mm, glabrous.

light brown, 2–2.5 mm, glabrous.

Eriogonum tomentosum

Eriogonum soredium

Phenology Flowering May–Oct. Flowering Jun–Sep.
Habitat Sandy soil, mixed grassland communities, pine and oak woodlands Gravelly to rocky limestone slopes, mixed saltbush and sagebrush communities, pinyon-juniper woodlands
Elevation 0-100(-200) m (0-300(-700) ft) 2000-2300 m (6600-7500 ft)
Distribution
from FNA
AL; FL; GA; SC
[WildflowerSearch map]
[BONAP county map]
from FNA
UT
[BONAP county map]
Discussion

Eriogonum tomentosum is widespread in a series of somewhat disjunct populations mainly on the coastal plain. It supposedly is found in North Carolina, but no specimens have been seen. An unnumbered J. K. Small collection from Miami, Florida (Nov. 1904, NY), surely is mislabeled. A Cuthbert collection (30 Jul. 1876, MICH) from Augusta may be from a garden, as that location is well out of the known range of the species. Mark Catesby made the first collections (BM-Sloane, OXF) of the species in the 1720s. T. Walter (1788) ascribed his specimen (BM-Walter) to a European species of Saxifragaceae.

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

Of conservation concern.

Eriogonum soredium is a rare and localized species known only from the San Francisco Mountains of Beaver County. It is considered a “sensitive” species in Utah, and occasionally is seen in cultivation.

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

Source FNA vol. 5, p. 330. FNA vol. 5, p. 278.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eriogonum Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eucycla
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. 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. 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 Michaux: Fl. Bor.-Amer. 1: 246, plate 24. (1803) Reveal: Great Basin Naturalist 41: 229, fig. 1. (1981)
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