Grindelia adenodonta

(Steyermark) G. L. Nesom

Phytologia 73: 327. 1992.

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

Annuals, 30–130 cm. Stems erect, stramineous to purple, proximally sparsely hirtellous to glabrate, distally ± hirtellous to villosulous. Cauline leaf-blades ovate or ± triangular to oblong or obovate, 15–60 (–90) mm, lengths 1.5–3 (–4+) times widths, bases ± clasping, margins ± crenate (teeth 8–14 per cm, blunt, resin-tipped), apices obtuse to acute, faces usually hirtellous to scabridulous and glandular (glands usually in pits, sometimes sessile, seldom stipitate), sometimes glabrate. Heads in open, corymbiform to paniculiform arrays or borne singly. Involucres ± urceolate to hemispheric, 8–12 × 10–20 mm (usually subtended by leaflike bracts). Phyllaries in 4–6 series, spreading to appressed, lanceolate to linear, apices subulate, hooked to ± recurved or nearly straight, moderately resinous. Ray-florets 20–27; laminae 8–12 mm. Cypselae stramineous or brownish, 3–4.5 mm, apices ± coronate to knobby, faces (outer) rugose (not transversely fissured; angles ± ribbed) or (inner) striate; pappi of 2 straight or weakly contorted, smooth (apices dilated), bristles or setiform awns 5–6 mm, equaling or surpassing disc corollas. 2n = 12.


Phenology: Flowering (Jun–)Jul–Sep.
Habitat: Prairies, thickets, along streams
Elevation: 10–200 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Grindelia adenodonta"
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 +
straight +
setiform +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decurrent +
Grindelia microcephala var. adenodonta +
compound +  and simple +
rugulose +  and muricate +
barbellulate +  and barbellate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
6 cm60 mm <br />0.06 m <br /> (9 cm90 mm <br />0.09 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
more or less triangular;oblong or obovate +
spatulate +  and triangular lanceolate or linear +
yellow +  and orange +
beaked +, 2-ribbed +  and 5-ribbed +
brownish +  and stramineous +
3-4-angled +, compressed +, ellipsoid +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
10–200 m +
gland-dotted +
glabrate +  and hirtellous +
striate +, rugose +  and scabridulous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Prairies, thickets, along streams +
corymbiform +  and paniculiform +
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 />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
less urceolate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 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 barbellate +
contorted to curled +  and straight +
Flowering (Jun–)Jul–Sep. +
obscurely +  and 1-nerved +
spreading +  and appressed +
lanceolate +  and linear +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
subulate +
exalbuminous +
branched +  and simple +
1 (?) +  and 6 (?) +
resinous +
stramineous +  and purple +
lanceolate +  and more or less deltate +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Grindelia adenodonta +
Grindelia +
species +
ampliate +
30 cm300 mm <br />0.3 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +