Chrysactinia mexicana

A. Gray

Mem. Amer. Acad. Arts, n. s. 4: 93. 1849.

Illustrated
Treatment appears in FNA Volume 21. Treatment on page 232.

Plants twiggy. Leaf-blades 5–10 (–23) × 1–2 mm. Peduncles 15–75 mm (heads usually held well beyond foliage). Ray laminae 6–12 × 2–4 mm. Disc corollas 4.5–7 mm. Cypselae 3–4 mm; pappi 3–5.5 mm. 2n = 45.


Phenology: Flowering spring–fall.
Habitat: Mostly on limestone and derived soils
Elevation: 200–2200+ m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Chrysactinia mexicana"
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
A. Gray +
decurrent +
linear;clavate or acerose +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +  and orange +
glabrescent +  and strigillose +
cylindric +  and fusiform +
fertile +  and bisexual +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
fertile +  and bisexual +
N.Mex. +, Tex. +  and Mexico +
200–2200+ m +
puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Mostly on limestone and derived soils +
cymiform +, corymbiform +, discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
turbinate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sessile +  and petiolate +
lance-deltate +
2-carpellate +
persistent +
coroniform +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
Flowering spring–fall. +
8 +  and 14 +
Mem. Amer. Acad. Arts, n. s. +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
bearing subulate enations +, hairy +  and bristly +
convex;hemispheric +
5 +  and 20 +
exalbuminous +
Illustrated +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Tageteae +
Chrysactinia mexicana +
Chrysactinia +
species +
cylindric +
toothed +  and entire +
perennial +  and annual +