Acourtia thurberi

(A. Gray) Reveal & R. M. King

Phytologia 27: 231. 1973.

Common names: Thurber’s desertpeony
Basionyms: Perezia thurberi A. Gray Pl. Nov. Thurber., 324. 1854
Treatment appears in FNA Volume 19. Treatment on page 74. Mentioned on page 73.

Plants 40–150 cm (stems sulcate to striate distally, densely glandular). Leaves cauline and/or basal; sessile; blades ovate to ovate-elliptic, 1.5 (cauline) –18 (basal) cm, bases shortly sagittate or clasping, margins acerose-denticulate, faces densely glandular-puberulent. Heads in subcongested corymbiform arrays. Involucres obconic to campanulate, 7–9 mm. Phyllaries in 2–3 series, oblong-oblanceolate, apices acuminate, abaxial faces densely glandular-hairy. Receptacles alveolate, glandular. Florets 3–6; corollas lavender-pink (purple), 7–12 mm. Cypselae subcylindric to subfusiform, 3–7 mm, glandular; pappi bright white, 8–9 mm (rigid). 2n = 54.


Phenology: Flowering Oct–Nov.
Habitat: Gravel and caliche soils in warm Sonoran desert scrub
Elevation: 100–200 m

Distribution

V19-8-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Durango), Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Acourtia thurberi"
glandular-hairy +
scarious +
corymbiform +  and subcongested +
indeterminate +  and determinate +
Beryl B. Simpson +
(A. Gray) Reveal & R. M. King +
rounded +  and elongate +
sagittate +
Perezia thurberi +
compound +  and simple +
ovate;ovate-elliptic +
1.5 cm15 mm <br />0.015 m <br /> (18 cm180 mm <br />0.18 m <br />) +
ribbed;smooth +
less barbellate +  and nearly smooth +
white +  and tan +
Thurber’s desertpeony +
lavender-pink +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ribbed +  and not beaked +
subcylindric +  and subfusiform +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +, Mexico (Durango) +  and Mexico (Sonora) +
100–200 m +
glandular-puberulent +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Gravel and caliche soils in warm Sonoran desert scrub +
in paniculiform or corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
obconic;campanulate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
basal +  and cauline +
serrate +  and dentate +
acerose-denticulate +
2-carpellate +
bright white +
persistent +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Flowering Oct–Nov. +
connate +  and distinct +
convex;flat;convex;flat;concave +
barbellulate +  and smooth +
plumose +, subulate +  and setiform +
exalbuminous +
prostrate +  and ascending +
appendaged +  and truncate +
hairy +  and glabrous +
papillate +
Compositae +
Acourtia thurberi +
Acourtia +
species +
50 cm500 mm <br />0.5 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +