Verbesina rothrockii

B. L. Robinson & Greenman

Proc. Amer. Acad. Arts 34: 541. 1899.

Treatment appears in FNA Volume 21. Treatment on page 111. Mentioned on page 107.

Plants 30–60+ cm (perennating bases ± erect, internodes not winged). Leaves all or mostly opposite (distal sometimes alternate); blades ovate-deltate or rhombic to lance-elliptic, 3–5 × 1–3 cm, bases subtruncate to cuneate, margins coarsely toothed to subentire, apices obtuse to acute, faces ± hirtellous to scabrellous. Heads borne singly. Involucres ± hemispheric, 10–15+ mm diam. Phyllaries 18–30+ in 3–4 series, ± erect, oblong to elliptic, 6–10+ mm. Ray-florets 8–13; laminae 15–25+ mm. Disc-florets 60–100+; corollas yellow. Cypselae dark-brown, ± elliptic, 10 mm, faces glabrous; pappi 0–0.5 mm. 2n = 34.


Phenology: Flowering (May–)Aug–Sep.
Habitat: Rocky slopes, igneous or limestone substrates
Elevation: 1200–1800 m

Distribution

V21-267-distribution-map.gif

Ariz., N.Mex., Mexico (Coahuila), Mexico (Durango), Mexico (Zacatecas)

Discussion

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

... more about "Verbesina rothrockii"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
obtuse;acute +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +, dichasiiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
B. L. Robinson & Greenman +
bristlelike +
subulate +
subtruncate +  and cuneate +
compound +  and simple +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
rhombic;lance-elliptic +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
hairy +  and glabrous +
oblanceolate +  and more or less elliptic +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Mexico (Coahuila) +, Mexico (Durango) +  and Mexico (Zacatecas) +
1200–1800 m +
glabrous +  and hirtellous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky slopes, igneous or limestone substrates +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
hemispheric +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
less deltate +  and lance-deltate +
dentate to pinnatifid or palmatifid +  and entire +
coarsely toothed +  and subentire +
2-carpellate +
persistent +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Flowering (May–)Aug–Sep. +
18 +  and 30 +
unequal +  and subequal +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Proc. Amer. Acad. Arts +
neuter +, styliferous +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
flat;convex or more or less conic +
subulate +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae +  and Undefined (tribe Undefined) subtribe Zinniinae +
Verbesina rothrockii +
Verbesina +
species +
campanulate +
cylindric +
shorter to longer than campanulate +
toothed +  and subentire +
perennial +  and annual +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
200 cm2,000 mm <br />2 m <br /> (400 cm4,000 mm <br />4 m <br />) +