Chrysactinia

A. Gray

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

Etymology: Greek chrysos, gold, and actinos, ray
Treatment appears in FNA Volume 21. Treatment on page 232. Mentioned on page 222.
 TaxonIllustrator 
FNA21 P36 Chrysactinia mexican.jpegChrysactinia mexicana
Porophyllum gracile
Tagetes micrantha
Yevonn Wilson-Ramsey
Linda Ann Vorobik
Bee F. Gunn

Subshrubs or shrubs, 10–40 [–80] cm (evergreen). Stems erect, strictly branched. Leaves cauline; mostly alternate [opposite]; blades simple [pinnate], linear to clavate or acerose (± fleshy), margins entire, faces usually glabrous, sometimes puberulent (oil-glands marginal or submarginal). Heads radiate, borne singly. Calyculi 0. Involucres turbinate to hemispheric, 3.5–5 [–8] mm diam. Phyllaries persistent, 8–14 in ± 2 series (distinct to bases, linear to lance-linear [ovate], carinate, each usually bearing 1–5 oil-glands). Receptacles convex to hemispheric, ± pitted, rarely paleate (paleae readily falling). Ray-florets 8 (–13), pistillate, fertile; corollas bright-yellow. Disc-florets 15–70, bisexual, fertile; corollas yellow to orange, tubes much shorter than cylindro-funnelform throats, lobes 5, lance-deltate. Cypselae cylindric to fusiform, strigillose or glabrescent; pappi persistent, of [20–] 30–40 bristles in ± 1 series. x = 15.

Distribution

sw United States, Mexico

Discussion

Species 5 (1 in the flora).

... more about "Chrysactinia"
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 +
fertile +  and bisexual +
sw United States +  and Mexico +
Greek chrysos, gold, and actinos, ray +
puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 +
sessile +  and petiolate +
lance-deltate +
2-carpellate +
persistent +
coroniform +
8 +  and 14 +
Mem. Amer. Acad. Arts, n. s. +
bearing subulate enations +, hairy +  and bristly +
convex;hemispheric +
strother1977a +
5 +  and 20 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Tageteae +
Chrysactinia +
Asteraceae (tribe Heliantheae) subtribe Pectidinae +
cylindric +
toothed +  and entire +
perennial +  and annual +
shrub +  and subshrub +