Acourtia nana

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

Phytologia 27: 230. 1973.

Common names: Desert holly dwarf desertpeony
Basionym: Perezia nana A. Gray Mem. Amer. Acad. Arts, n. s. 4: 111. 1849
Treatment appears in FNA Volume 19. Treatment on page 74. Mentioned on page 73.

Plants 2.5–30 cm, (divaricately branching). Leaves cauline; sessile; blades rhombic-orbiculate to suborbiculate, 10–50 mm, bases cuneate, margins coarsely and irregularly prickly-dentate, faces glabrous (reticulate). Heads borne singly (at branch tips). Involucres campanulate, 14–17 mm. Phyllaries in 4 series, broadly ovate, margins glandular, apices acute to mucronate, abaxial faces glabrous. Receptacles reticulate (sockets separated by squarish, apically pubescent paleae 1 mm). Florets 15–24; corollas lavender-pink or white, 10–17 mm. Cypselae subcylindric, 3–7.5 mm, densely stipitate-glandular; pappi white or tawny, 10–15 mm. 2n = 54.


Phenology: Flowering (Mar–)Apr(–Jun).
Habitat: Gravel, sandstone, silty, or caliche soils in desert scrub
Elevation: 0–1800 m

Distribution

V19-7-distribution-map.gif

Ariz., N.Mex., Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Nuevo León), Mexico (San Luis Potosí), Mexico (Sonora), Mexico (Zacatecas)

Discussion

Acourtia nana grows primarily in the trans-Pecos and western Edwards Plateau.

Selected References

None.

Lower Taxa

None.
... more about "Acourtia nana"
scarious +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Beryl B. Simpson +
(A. Gray) Reveal & R. M. King +
rounded +  and elongate +
cuneate +
Perezia nana +
compound +  and simple +
rhombic-orbiculate;suborbiculate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
ribbed;smooth +
less barbellate +  and nearly smooth +
white +  and tan +
Desert holly +  and dwarf desertpeony +
white +  and lavender-pink +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
ribbed +  and not beaked +
stipitate-glandular +
subcylindric +
Ariz. +, N.Mex. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Nuevo León) +, Mexico (San Luis Potosí) +, Mexico (Sonora) +  and Mexico (Zacatecas) +
0–1800 m +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Gravel, sandstone, silty, or caliche soils in desert scrub +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
campanulate +
1.4 cm14 mm <br />0.014 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
parted +, lobed +  and entire +
2-carpellate +
tawny +  and white +
persistent +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering (Mar–)Apr(–Jun). +
connate +  and distinct +
reticulate +, alveolate +  and foveolate +
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 nana +
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 />) +