Gutierrezia pomariensis

(S. L. Welsh) S. L. Welsh

Great Basin Naturalist 43: 288. 1983.

Common names: Orchard snakeweed
Endemic
Basionym: Gutierrezia sarothrae var. pomariensis S. L. Welsh Great Basin Naturalist 30: 19. 1970
Treatment appears in FNA Volume 20. Treatment on page 93. Mentioned on page 90.

Subshrubs, 20–50 cm. Stems sparsely scabrous or glandular-scabrous to glabrate. Leaves: basal absent at flowering; cauline blades 1-nerved, linear, 0.5–2.5 mm wide, slightly reduced distally. Heads borne singly or in pairs on bracteate peduncles, or some almost sessile, in loose arrays. Involucres cylindro-turbinate to turbinate-campanulate, 3–5 mm diam. Phyllary apices (green, broadly rounded), thickened, (prominently gland-dotted). Ray-florets (4–) 5–7 (–8); corollas yellow, 2–5 mm. Disc-florets 5–15. Cypselae 1–2 mm, faces without oil cavities, loosely strigose; pappi of 1–2 series of oblong-lanceolate scales 1–2 mm. 2n = 32.


Phenology: Flowering Jul–Sep.
Habitat: Dry, open, rocky sites, mixed desert shrub communities
Elevation: 1400–2200 m

Discussion

Gutierrezia pomariensis is similar to G. sarothrae and sympatric with it; the two are ecologically distinct, with G. pomariensis occupying drier habitats. “Intermediates in a populational sense are few and apparently confined to the ecotone in places where the two taxa grow nearby” (A. Cronquist 1994).

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Gutierrezia pomariensis"
hirtellous +, hispidulous +  and glabrous +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
(S. L. Welsh) S. L. Welsh +
decurrent +
white-indurate +
Gutierrezia sarothrae var. pomariensis +
compound +  and simple +
linear;lanceolate or spatulate +
rugulose +  and muricate +
barbellulate +  and barbellate +
Orchard snakeweed +
not 2-lipped +  and actinomorphic +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
not compressed +, cylindric +  and clavate +
fertile +  and bisexual +
fertile +  and bisexual +
1400–2200 m +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, open, rocky sites, mixed desert shrub communities +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cylindro-turbinate;turbinate-campanulate +
petiolate +  and sessile +
cauline +  and basal +
short-deltate +
2-carpellate +
erose-margined +
persistent +
of 5-10 whitish +  and coroniform +
Flowering Jul–Sep. +
3-nerved +  and 1-nerved +
ovate +  and lanceolate +
Great Basin Naturalist +
bearing subulate enations +, hairy +  and bristly +
oblong-lanceolate +
exalbuminous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
erect +  and ascending +
glandular-scabrous to glabrate +  and scabrous +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Gutierrezia pomariensis +
Gutierrezia +
species +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
perennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +