Croptilon rigidifolium
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
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
Tex., Mexico (Nuevo León)
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Croptilon rigidifolium"
arachnoid +
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
decurrent +
3-nerved +
narrowly oblanceolate;lanceolate +
ribbed +
stigmatic +
barbellate +
persistent +
30;35 +
equal +
absent +
spatulate;lanceolate +
equal-sized +
Stiff-leaf scratchdaisy +
absent +
6-14+-nerved +
dimorphic +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
crisped +
indeterminate +
turbinate +
surrounding +
narrowly turbinate;subcylindric or campanulate +
sessile +
alternate +
erect;spreading +
triangular +
scarious +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
eglandular +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
distinct +
herbaceous +
falling +
unequal +
Sida +
1981 +
pistillate +
absent +
fertile +
epaleate +
pitted +
concave;usually flat;conic +
fibrous +
exalbuminous +
modifed +
1;3;5 +
alternate +
linear-triangular +
2-branched +
glabrous +
Croptilon rigidifolium +
Croptilon +
species +
tubular +
shorter +
taprooted +