Croptilon rigidifolium

(E. B. Smith) E. B. Smith

Sida 9: 60. 1981.

Common names: Stiff-leaf scratchdaisy
Basionym: Haplopappus rigidifolius E. B. Smith Rhodora 67: 229. 1965,
Synonyms: Croptilon divaricatum var. hirtellum (Shinners) Shinners
Treatment appears in FNA Volume 20. Treatment on page 230. Mentioned on page 229.

Stems decumbent to erect, 20–150 cm. Cauline leaf blades spatulate to lanceolate, relatively even-sized distally, margins usually entire, sometimes serrate apically. Peduncles usually hirtellous to hispid, sometimes with crisped hairs as well, rarely glabrous, eglandular. Involucres turbinate to subcylincric, (4–)5–7 mm diam. Ray florets (5–)9–22; corolla laminae (4–)4.5–6.3(–7.4) mm. Disc florets (6–)25–45(–60). 2n = 10 (10 and 12 in one population).


Phenology: Flowering Sep–Nov(–Dec).
Habitat: Sandy soils, creek terraces, often in prairies, fields, pastures, roadsides
Elevation: 20–100 m

Distribution

V20-512-distribution-map.gif

Tex., Mexico (Nuevo León).

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Croptilon rigidifolium"
Guy L. Nesom +
(E. B. Smith) E. B. Smith +
Haplopappus rigidifolius +
Stiff-leaf scratchdaisy +
Tex. +  and Mexico (Nuevo León). +
20–100 m +
Sandy soils, creek terraces, often in prairies, fields, pastures, roadsides +
Flowering Sep–Nov(–Dec). +
Croptilon divaricatum var. hirtellum +
Croptilon rigidifolium +
Croptilon +
species +