Grindelia microcephala

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 315. 1836.

Endemic
Treatment appears in FNA Volume 20. Treatment on page 430. Mentioned on page 427.

Annuals, 15–40 cm. Stems erect, stramineous, ± villous and/or stipitate-glandular. Cauline leaf-blades ± oblong or spatulate, 10–30 (–45+) mm, lengths 2–3.5 times widths, bases clasping, margins ± crenulate (teeth 6–8 per cm, obtuse, resin-tipped), apices obtuse or acute, faces usually hirtellous and glandular (glands usually in pits, seldom sessile or stipitate), sometimes glabrate. Heads in open, corymbiform arrays. Involucres broadly urceolate to hemispheric, 6–9 × 8–13 mm (usually subtended by leaflike bracts). Phyllaries in 5–6 series, spreading to appressed, lanceolate, apices acute to subulate, slightly recurved to straight, little, or not at all, resinous. Ray-florets 16–27; laminae 6–9 (–12) mm. Cypselae brownish, 3.5–4 mm, apices smooth or obscurely coronate, faces smooth or slightly rugose (little, if at all, transversely fissured); pappi of 2–3 straight or weakly contorted, smooth (apices dilated), bristles or setiform awns 3.5–5 mm, equaling or slightly surpassing disc corollas. 2n = 12.


Phenology: Flowering (Nov–)Mar–Jun(–Aug).
Habitat: Bottomlands, rich low ground, thickets, near streams
Elevation: 0–500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Grindelia microcephala"
not tailed +, rounded +  and obtuse +
resinous +
straight +
distinct +
coronate;acute;subulate +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and open +
indeterminate +  and determinate +
John L. Strother +  and Mark A. Wetter +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
setiform +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
decurrent +
compound +  and simple +
rugulose +  and muricate +
barbellulate +  and barbellate +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
spatulate;oblong +
spatulate +  and triangular lanceolate or linear +
yellow +  and orange +
beaked +, 2-ribbed +  and 5-ribbed +
3-4-angled +, compressed +, ellipsoid +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
0–500 m +
gland-dotted +
glabrate +  and hirtellous +
rugose +  and smooth +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Bottomlands, rich low ground, thickets, near streams +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
broadly urceolate;hemispheric +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
spreading;erect +
deltate +
usually serrate +  and dentate +
crenulate +
2-carpellate +
barbellulate +  and barbellate +
contorted to curled +  and straight +
slightly surpassing disc corollas +  and equaling +
Flowering (Nov–)Mar–Jun(–Aug). +
obscurely +  and 1-nerved +
spreading +  and appressed +
lanceolate +
subequal +  and unequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
subulate +
exalbuminous +
branched +  and simple +
1 (?) +  and 6 (?) +
resinous +
stramineous +
stipitate-glandular +  and villous +
lanceolate +  and more or less deltate +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Grindelia microcephala +
Grindelia +
species +
ampliate +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +