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Wooton's buckwheat, Wooton's wild buckwheat

San Jacinto buckwheat, San Jacinto wild buckwheat

Habit Herbs, erect, 4–5 × 3–5 dm, tomentose to floccose. Herbs, erect to spreading, annual, 2–9 dm, glabrous and sparsely glandular especially (or at least) near nodes, grayish to greenish.
Stems

caudex absent;

aerial flowering stems erect, stout, solid, not fistulose, arising directly from a taproot, 1–2.5 dm, tomentose to floccose.

caudex absent;

aerial flowering stems erect, solid, not fistulose, 0.5–1.5 dm, glabrous, glandular distally or sparsely so throughout.

Leaves

basal, not in rosettes;

petiole 2–5 cm, tomentose to floccose;

blade elliptic, (2.5–)3–6.5 × 1.5–3 cm, densely whitish- to tannish-tomentose abaxially, thinly tomentose to floccose and greenish adaxially, margins entire, plane.

basal;

petiole 1–4 cm, pilose, slightly winged;

blade oblanceolate to obovate, (0.5–)1–4 × 0.5–1.5 cm, sparsely pilose, glandular and greenish on both surfaces, margins entire.

Inflorescences

compound-umbellate, 5–15 × 5–20 cm;

branches tomentose to floccose;

bracts 3–6, leaflike at proximal node, 2–4(–5) × 0.7–1.8 cm, often scalelike distally.

cymose, open, 30–80 × 10–50 cm;

branches not fistulose, glabrous, sparsely glandular at nodes;

bracts 3, scalelike, 1–2 × 1–2 mm.

Peduncles

deflexed, straight, filiform, (0.1–)0.2–0.35 cm, sparsely glandular.

Involucres

1 per node, campanulate, 3–6 × 3–7 mm, thinly floccose;

teeth 5–7, erect, 0.3–0.6 mm.

turbinate, 1.2–1.5 × 1–1.3 mm, glabrous;

teeth 4, erect or nearly so, 0.3–0.7 mm.

Flowers

4–7(–9) mm, including 1–1.5 mm stipelike base;

perianth bright yellow, densely pubescent abaxially;

tepals dimorphic, those of outer whorl lanceolate to elliptic, 3–6 × 1.5–2.5, those of inner whorl elliptic, 5–9 × 2–3.5 mm;

stamens exserted, 3–5 mm;

filaments pilose proximally.

1.5–2.5 mm;

perianth white with reddish brown midribs, becoming reddish in fruit, rarely yellow, puberulent;

tepals monomorphic, oblong-obovate, sometimes with apiculate tip 1–2 mm;

stamens exserted, 1.5–2 mm;

filaments glabrous.

Achenes

light brown to brown, 4–8 mm, glabrous except for sparsely pubescent beak.

light brown to brown, lenticular, 1.3–1.7(–2.2) mm, glabrous.

2n

= 40.

Eriogonum wootonii

Eriogonum apiculatum

Phenology Flowering Jul–Sep. Flowering May–Nov.
Habitat Sandy to gravelly slopes, sagebrush communities, montane conifer woodlands Sandy granitic flats and slopes, chaparral communities, oak and conifer woodlands
Elevation 2000-2800 m (6600-9200 ft) (200-)700-2700 m ((700-)2300-8900 ft)
Distribution
from FNA
NM
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Eriogonum wootonii is known only from the San Francisco Mountains of Lincoln and Otero counties in southern New Mexico. It is related to, but significantly disjunct from, E. arcuatum, and is part of a three-species complex that includes E. correllii of northern Texas and E. allenii of Virginia and West Virginia, and that skips across the central United States, the result of fragmentation associated with the southward push of Pleistocene glaciation.

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

Eriogonum apiculatum is restricted to the San Jacinto, Santa Rosa, Palomar, and Cuyamaca mountains of Riverside and San Diego counties. Two collections are discounted as to location: Hall 1025 (MIN), purportedly from the San Bernardino Mountains, certainly was labeled erroneously by the Parish brothers, who redistributed the sheet; and Jaeger s.n. (19 May 1940, DS, IDS, UTC, WTU) from “Falcon Flat” in the Little San Bernardino Mountains appears to be another of the small but significant list of Jaeger specimens with highly dubious label data. No such place is known in Joshua Tree National Park. The phase of the species named var. subvirgatum, with nearly sessile involucres, occurs intermixed with the typical expression.

A yellow-flowered population was found at the eastern end of the San Bernardino Mountains, San Bernardino County. Recent attempts to relocate those plants have been unsuccessful, and they remain undescribed.

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

Source FNA vol. 5, p. 370. FNA vol. 5, p. 389.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Ganysma
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. 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. 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. 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. 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
Synonyms E. jamesii var. wootonii
Name authority (Reveal) Reveal: Harvard Pap. Bot. 9: 206. (2003) S. Watson: Proc. Amer. Acad. Arts 17: 378. (1882)
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