Eriogonum jonesii

S. Watson

Proc. Amer. Acad. Arts 21: 454. 1886.

Common names: Jones’s wild buckwheat
Endemic
Synonyms: Eriogonum lanosum Eastwood
Treatment appears in FNA Volume 5. Treatment on page 260. Mentioned on page 239.

Subshrubs, spreading, not scapose, 2–5 × 2.5–5 (–6) dm, white to brownish-tomentose, reddish to brownish-white. Stems spreading, without persistent leaf-bases, up to 1/4 height of plant; caudex stems absent; aerial flowering-stems erect or nearly so, somewhat stout, solid, not fistulose, 1–2 (–2.5) dm, floccose. Leaves cauline on proximal 1–7 (–9) cm of stem, 1 per node; petiole 1.5–4 (–5) cm, tomentose; blade cordate, (1.5–) 2–3.5 × 1–2 (–2.5) cm, densely white-tomentose abaxially, floccose and greenish or brownish white adaxially, margins plane or crenulate. Inflorescences cymose, usually open, 3–15 × 5–20 cm; branches dichotomous, tomentose to floccose; bracts 3, scalelike, triangular, 1–4 mm. Peduncles absent. Involucres 1 per node, turbinate, 1.5–2 (–2.5) × 1–1.5 (–1.8) mm; teeth 5–6, erect, 0.3–0.5 mm. Flowers 2–3 mm; perianth brownish white, glabrous; tepals connate proximal 1/4, dimorphic, those of outer whorl obovate, 1.8–2 mm wide, those of inner whorl lanceolate to narrowly elliptic, 1–1.2 mm wide; stamens slightly exserted, 2.5–4 mm; filaments glabrous or sparsely pilose proximally. Achenes brown, 2–2.5 mm, glabrous.


Phenology: Flowering Aug–Nov.
Habitat: Rocky limestone, sandstone or pumice washes, flats, and outcrops, saltbush, blackbrush, and sagebrush communities, pinyon-juniper woodlands
Elevation: 1200-2100 m

Discussion

Of conservation concern.

Eriogonum jonesii is found primarily in Coconino County, with scattered populations just entering Mohave and Navajo counties. Jones’s wild buckwheat would make an interesting addition to the garden. Although the plants are sometimes “leggy,” the white to brownish tomentum is attractive, as are the brownish-white flowers.

Selected References

None.

Lower Taxa

None.

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... more about "Eriogonum jonesii"
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
S. Watson +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
brownish white +  and greenish +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
floccose +  and white-tomentose +
cordate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not brittle +
spreading +  and erect +
tomentose +  and floccose +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Jones’s wild buckwheat +
1200-2100 m +
pilose +  and glabrous +
unisexual +, , +  and bisexual +
not attenuate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
slender;stout +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Rocky limestone, sandstone or pumice washes, flats, and outcrops, saltbush, blackbrush, and sagebrush communities, pinyon-juniper woodlands +
reduced +
open +  and cymose +
capitate +  and subcapitate +
dense +  and diffuse +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
connate +  and free +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
crenulate +  and plane +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
brownish white +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Aug–Nov. +
homostylous +  and 3-carpellate +
Proc. Amer. Acad. Arts +
, +  and solid +
slender;stout +
persistent +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decumbent to erect +  and prostrate +
glandular +, pubescent +  and glabrous +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
spreading;erect +
Eriogonum lanosum +
chambered +  and solid +
slender +  and stout +
Eriogonum jonesii +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
in proximal 1/2 +  and connate +
0 +  and 1/2 +
lobed +  and laciniate +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
reddish +  and brownish-white +
brownish-tomentose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +