Diaperia prolifera var. barnebyi

Morefield

Novon 14: 470. 2004.

Common names: Barneby rabbit-tobacco
Treatment appears in FNA Volume 19. Treatment on page 463.

Plants silvery white, 3–9 cm, tightly sericeous. Stems mostly 1–5; branches equal to unequal, distal strictly ascending to erect. Leaves: largest 7–11 × 2–3 mm; capitular leaves erect, involucral, proximally carinate, becoming indurate. Heads borne singly, or 2–3 in largest glomerules. Receptacles narrowly conic, 0.9–1.1 mm, heights mostly 2–2.4 times diams. Pistillate paleae: longest 2.5–3.2 mm.


Phenology: Flowering and fruiting mid Apr–mid Jun.
Habitat: Open, dry, shallow rocky or gravelly soils, usually over limestone or gypsum, sometimes with extra moisture (dry drainages, disturbed places)
Elevation: 500–1500 m

Discussion

Variety barnebyi is not particularly weedy. It occurs in southwestern Oklahoma, southeastern New Mexico, and western Texas (nearly to Mexico), largely allopatric with var. prolifera.

Selected References

None.

Lower Taxa

None.
spreading +  and erect to somewhat +
scarious +
mostly ovate +  and lanceovate or linear +
racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
James D. Morefield +
Morefield +
decurrent +
Evax prolifera +
compound +  and simple +
oblanceolate;obovate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
spatulate;oblanceolate;oblong flat +
unequal +
Barneby rabbit-tobacco +
actinomorphic +
red-tipped +, purplish +, yellow +  and whitish +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
light +  and dark-brown +
obcompressed +
strictly ascending +  and erect +
N.Mex. +, Okla. +  and Tex. +
500–1500 m +
shiny +  and dull +
papillate +
winged +  and beaked +
dispersed +
incurved +  and spreading +
Open, dry, shallow rocky or gravelly soils, usually over limestone or gypsum, sometimes with extra moisture (dry drainages, disturbed places) +
racemiform +, spiciform +  and pseudo-polytomous +
indeterminate +
2-3 times diams +
visible-surpassing +
homogamous +  and heterogamous +
cylindric +  and more or less ellipsoid +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
each +  and sessile +
inconspicuous +
sessile +  and petiolate +
7mm;11mm +
cauline +  and basal +
largest +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rarely lanceovate +  and lanceolate +
2-carpellate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
persistent +
Flowering and fruiting mid Apr–mid Jun. +
subequal +  and unequal +
paleate +  and epaleate +
2-2.4 times diams +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
exalbuminous +
Illustrated +  and Endemic +
ascending +  and more or less prostrate +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Evax sect. Diaperia +
Diaperia prolifera var. barnebyi +
Diaperia prolifera +
variety +
3 cm30 mm <br />0.03 m <br /> (25 cm250 mm <br />0.25 m <br />) +