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pineland buckwheat, pineland wild buckwheat

arrow-leaf buckwheat, arrowleaf wild buckwheat, northern buckwheat

Habit Herbs, erect, 4–10 dm, glabrous, greenish to grayish. Herbs, erect, infrequently polygamodioecious, 2–4(–7) × 2–5 dm; floccose or glabrous.
Stems

aerial flowering stems erect, 1–4 dm, glabrous.

caudex spreading;

aerial flowering stems erect, slender or stout, hollow, often slightly fistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, 1–5 dm, floccose or glabrous.

Leaves

basal;

petiole 1–6 cm, floccose;

blade round to reniform, (0.5–)1–4 × (0.5–)1–4 cm, densely white-tomentose abaxially, floccose to glabrate and mostly greenish adaxially.

basal, occasionally in rosettes;

petiole 4–10(–15) cm, tomentose;

blade lanceolate or ovate to deltoid, (2–)7–25 × (0.7–)1–8 cm, densely white-lanate to tomentose abaxially, less so to glabrate and greenish adaxially, margins entire, plane.

Inflorescences

cymose, occasionally distally uniparous due to suppression of secondary branches, open, 30–80 × 10–50 cm;

branches straight, not inwardly curved distally, glabrous;

bracts 1–3 × 1–3 mm.

umbellate or compound-umbellate, 3–20 × 3–20 cm;

branches floccose or glabrous;

bracts 3–several, leaflike or semileaflike at proximal nodes, linear to linear-lanceolate, 1–3(–6) cm, scalelike distally, usually 1–5 × 0.5–3 mm.

Peduncles

absent.

Involucres

appressed to branches, cylindric-turbinate, (3.5–)4–5(–7) × 2.5–3 (3.5) mm, glabrous;

teeth 5, erect, 0.2–0.4 mm.

1 per node, turbinate-campanulate to campanulate, 6–10 × 4–10 mm, sparsely to densely lanate, weakly glandular-puberulent, or glabrous;

teeth (5–)7–10, usually not lobelike, erect to weakly reflexed, 2–4 mm.

Flowers

1.5–3 mm;

perianth white to pink, rarely pale yellow, glabrous;

tepals monomorphic, oblong-obovate;

stamens included, 1–1.5 mm;

filaments pilose proximally.

5–6 mm, including 0.7–1.5 mm stipelike base;

perianth pale to bright yellow, occasionally ochroleucous, glabrous;

tepals monomorphic, oblong to oblong-ovate;

stamens slightly exserted, 4–8 mm;

filaments pilose proximally.

Achenes

brown, 3-gonous, 2–2.5 mm, glabrous.

light brown, 5–6 mm, glabrous except for sparsely pubescent beak.

2n

= 40.

Eriogonum molestum

Eriogonum compositum

Phenology Flowering May–Sep.
Habitat Sandy flats and slopes, grassland and chaparral communities, oak and montane conifer woodlands
Elevation 1100-2200 m (3600-7200 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ID; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Eriogonum molestum is infrequent to occasionally common in the San Bernardino (San Bernardino County) and San Jacinto (Riverside County) mountains, and in scattered mountain ranges of San Diego County, California. It is easily confused with the perennial E. nudum var. pauciflorum.

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

Varieties 3 (3 in the flora).

Eriogonum compositum is one of the more attractive members of the genus and does well in cultivation. The three varieties are only weakly differentiated, and both var. lancifolium and var. leianthum merge with var. compositum. The butterfly Euphilotes enoptes is a pollinator of this species.

The Okanagan-Colville Indians of British Columbia and Washington used plants of Eriogonum compositum as a cold remedy, an antidiarrheal, and a wash for infected cuts. Not surprisingly, children used the hollow, often slightly inflated stems as a toy (N. J. Turner et al. 1980).

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

Key
1. Leaf blades lanceolate; Chelan, Kittitas, Okanogan, and Yakima counties, Washington
var. lancifolium
1. Leaf blades ovate to deltoid; widespread
→ 2
2. Involucres sparsely to densely lanate; n California, wc Idaho, Oregon, and Washington
var. compositum
2. Involucres glabrous or weakly glandular-puberulent; wc Idaho, ne Oregon, and e Washington
var. leianthum
Source FNA vol. 5, p. 422. FNA vol. 5, p. 355.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oregonium Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum
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. 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. 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
Subordinate taxa
E. compositum var. compositum, E. compositum var. lancifolium, E. compositum var. leianthum
Synonyms E. vimineum subsp. molestum
Name authority S. Watson: Proc. Amer. Acad. Arts 17: 379. (1882) Douglas ex Bentham: Edwards’s Bot. Reg. 21: plate 1774. (1835)
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