Grindelia pusilla

(Steyermark) G. L. Nesom

Phytologia 73: 327. 1992.

Basionym: Grindelia microcephala var. pusilla Steyermark Ann. Missouri Bot. Gard. 21: 467. 1934
Treatment appears in FNA Volume 20. Treatment on page 430. Mentioned on page 427.

Annuals, 30–70 cm. Stems erect, stramineous, villosulous, stipitate-glandular. Cauline leaf-blades spatulate or oblong to lanceolate, (12–) 35–60 (–80) mm, lengths mostly 3–6 times widths, margins ± crenate (teeth 5–10 per cm, blunt, resin-tipped), apices obtuse to acute, faces usually hirtellous and glandular (glands usually stipitate, sometimes sessile, seldom in pits), sometimes glabrate. Heads in open, corymbiform arrays or borne singly. Involucres ± globose, (6–) 8–12 × (6–) 12–18 mm (usually subtended by leaflike bracts). Phyllaries in 4–6 series, spreading to appressed, linear to lanceolate, apices recurved to ± straight, subulate to acuminate, slightly resinous. Ray-florets 13–27, laminae 5–12 mm. Cypselae stramineous to brownish, 2.5–4 mm, apices ± coronate, faces rugose (transversely fissured); pappi of 2–3 straight, smooth or (distally) barbellulate (apices usually dilated), setiform awns 4.5–5.5 mm, equaling or surpassing disc corollas. 2n = 12.


Phenology: Flowering (Nov–)Mar–Jun.
Habitat: Disturbed, dry, open sites
Elevation: 0–500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Grindelia pusilla"
not tailed +, rounded +  and obtuse +
resinous +
straight +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
John L. Strother +  and Mark A. Wetter +
(Steyermark) G. L. Nesom +
setiform +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
decurrent +
Grindelia microcephala var. pusilla +
compound +  and simple +
rugulose +  and muricate +
barbellulate +  and barbellate +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
oblong;lanceolate +
spatulate +  and triangular lanceolate or linear +
yellow +  and orange +
beaked +, 2-ribbed +  and 5-ribbed +
stramineous +  and brownish +
3-4-angled +, compressed +, ellipsoid +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Tex. +  and Mexico (Coahuila) +
0–500 m +
gland-dotted +
glabrate +  and hirtellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Disturbed, dry, open sites +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
spreading;erect +
deltate +
usually serrate +  and dentate +
2-carpellate +
barbellulate +  and smooth +
contorted to curled +  and straight +
Flowering (Nov–)Mar–Jun. +
obscurely +  and 1-nerved +
spreading +  and appressed +
linear +  and lanceolate +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
subulate +
exalbuminous +
branched +  and simple +
1 (?) +  and 6 (?) +
resinous +
stramineous +
lanceolate +  and more or less deltate +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Grindelia pusilla +
Grindelia +
species +
ampliate +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +