Eriogonum helichrysoides

(Gandoger) Prain in B. D. Jackson et al.

in B. D. Jackson et al., Index Kew., suppl. 4: 82. 1913.

Common names: Strawflower wild buckwheat
Endemic
Basionym: Eriogonum microthecum subsp. helichrysoides Gandoger Bull. Soc. Roy. Bot. Belgique 42: 192. 1906
Synonyms: Eriogonum effusum subsp. helichrysoides (Gandoger) S. Stokes Eriogonum effusum var. rosmarnioides Bentham
Treatment appears in FNA Volume 5. Treatment on page 248. Mentioned on page 242.

Shrubs, spreading, not scapose, 1.5–3 (–4) × 3–8 dm, floccose and dark green. Stems spreading, often without persistent leaf-bases, up to 1/3 height of plant; caudex stems absent; aerial flowering-stems erect to slightly spreading, slender, solid, not fistulose, 0.02–0.04 dm, floccose. Leaves cauline, 1 per node; petiole 0.2–0.7 cm, floccose; blade linear to linear-oblanceolate, (2–) 3–6 × 0.1–0.3 cm, densely tomentose abaxially, floccose and green adaxially, margins revolute. Inflorescences cymose, compact, 0.5–1.3 (–1.6) dm; branches dichotomous, floccose to nearly glabrous; bracts 3, scalelike, triangular, 0.5–2 mm. Peduncles absent or erect, 0.5–2.5 cm, floccose. Involucres 1 per node, turbinate, 2.5–3 × 1–2 mm, floccose or glabrous; teeth 5, erect, 0.3–0.6 mm. Flowers 2–2.5 (–3) mm; perianth white, becoming rose, glabrous; tepals connate proximal 1/4, essentially monomorphic, elliptic to obovate; stamens exserted, 2.5–4.5 mm; filaments sparsely pilose. Achenes brown, 2–2.5 mm, glabrous.


Phenology: Flowering Jul–Sep.
Habitat: Clay slopes or chalky limestone outcrops, mixed grassland communities
Elevation: 900-1100 m

Discussion

Eriogonum helichrysoides is limited to west-central Kansas (Ellis, Gove, Lane, Logan, Scott, and Trego counties). The plants’ dark green color and narrow leaf blades readily segregate the species from E. effusum.

Selected References

None.

Lower Taxa

None.

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... more about "Eriogonum helichrysoides"
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
(Gandoger) Prain in B. D. Jackson et al. +
deciduous +  and persistent +
stipelike +
Eriogonum microthecum subsp. helichrysoides +
papillate +
awn-tipped +  and simple +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
floccose +  and tomentose +
linear;linear-oblanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not brittle +
spreading +  and erect +
floccose +  and nearly glabrous +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Strawflower wild buckwheat +
900-1100 m +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
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 +
Clay slopes or chalky limestone outcrops, mixed grassland communities +
reduced +
capitate +  and subcapitate +
dense +  and diffuse +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
glabrous +  and floccose +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering Jul–Sep. +
homostylous +  and 3-carpellate +
in B. D. Jackson et al., Index Kew., suppl. +
, +  and solid +
slender;stout +
persistent +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 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 effusum subsp. helichrysoides +  and Eriogonum effusum var. rosmarnioides +
chambered +  and solid +
slender +  and stout +
Eriogonum helichrysoides +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
0 +  and 1/2 +
elliptic +  and obovate +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +