Ageratina wrightii

(A. Gray) R. M. King & H. Robinson

Phytologia 19: 228. 1970.

Common names: Wright’s snakeroot
Basionyms: Eupatorium wrightii A. Gray Smithsonian Contr. Knowl. 3(5): 87. 1852
Treatment appears in FNA Volume 21. Treatment on page 552. Mentioned on page 548.

Shrubs, 50–150 cm. Stems erect, puberulous. Leaves opposite proximally, alternate on distal 1/3–1/2 of stem; petioles narrowly winged, 3–5 (–8) mm; blades ovate to deltate-ovate, mostly 1–2 × 0.5–1.5 (–2) cm, bases truncate to cuneate or attenuate, margins entire or shallowly crenate, apices acute to blunt or obtuse, abaxial faces glanddotted. Heads clustered. Peduncles 1–3 mm, puberulent. Involucres 3.5–4.5 mm. Phyllaries: apices acute, abaxial faces puberulent. Corollas pinkish white to pink, glabrous. Cypselae sparsely hispidulous.


Phenology: Flowering (Jul–)Aug–Oct(–Nov).
Habitat: Limestone slopes, ledges, alluvium, in brushy vegetation
Elevation: 1300–2200 m

Distribution

V21-1401-distribution-map.gif

Ariz., N.Mex., Tex., Mexico

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Ageratina wrightii"
not tailed +, truncate +, rounded +  and obtuse +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
indeterminate +  and determinate +
Guy L. Nesom +
(A. Gray) R. M. King & H. Robinson +
truncate +  and cuneate or attenuate +
enlarged +
Eupatorium wrightii +
3(-5)-nerved +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dissected +, lobed +, toothed +  and entire +
ovate;deltate-ovate +
0.5cm;1.5cm +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
Wright’s snakeroot +
pinkish white +  and pink +
scabrellous +
fusiform +  and prismatic +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Tex. +  and Mexico +
1300–2200 m +
puberulent +, pilose +, hispidulous +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Limestone slopes, ledges, alluvium, in brushy vegetation +
indeterminate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
campanulate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
alternate +  and opposite +
lanceolate +  and lance-linear +
serrate +, dentate +  and entire +
crenate +  and entire +
2-carpellate +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering (Jul–)Aug–Oct(–Nov). +
2-nerved +  and 0-nerved +
8 +  and 30 +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Ageratina wrightii +
Ageratina +
species +
obconic +  and campanulate +