Dyssodia

Cavanilles

Descr. Pl., 202. 1802.

Etymology: Greek dysodia, a bad odor
Treatment appears in FNA Volume 21. Treatment on page 230. Mentioned on page 222.
 TaxonIllustrator 
FNA21 P35 Pectis longipes.jpegPectis longipes
Dyssodia papposa
Nicolletia edwardsii
John Myers
Marjorie C. Leggitt
Yevonn Wilson-Ramsey

Annuals [perennials], 10–30 (–70+) cm. Stems erect to decumbent, branched from bases or throughout. Leaves cauline; mostly opposite (distal sometimes alternate); blades (1–) 2–3-pinnatisect, primary lobes linear to linear-cuneate, ultimate margins entire or toothed, faces puberulent (little, if at all, setaceous at bases, on teeth, or at tips of lobes, oil-glands submarginal). Heads radiate, borne singly or in 2s or 3s [pseudocephalia]. Calyculi of [0] 1–9 ± linear bractlets (lengths 1/2–1 phyllaries, bearing oil-glands). Involucres turbinate to campanulate [hemispheric], 5–10 mm diam. Phyllaries persistent, 6–12 in ± 2 series (distinct to bases or nearly so, oval-oblanceolate, each bearing 1–7 round to elliptic oil-glands). Receptacles convex, ± pitted (socket margins fimbrillate to setose), epaleate. Ray-florets usually 5–8, pistillate, fertile; corollas yellow-orange. Disc-florets 12–50 [–100+], bisexual, fertile; corollas yellow to orange, tubes shorter than cylindric throats, lobes 5, deltate to lance-deltate. Cypselae obpyramidal to obconic, subsericeous or glabrescent; pappi persistent, of 15–20 scales in ± 2 series (each scale comprising 5–10 basally connate, unequal bristles). x = 13.

Distribution

North America, Mexico, Central America, in South America

Discussion

Species 4 (1 in the flora).

Selected References

None.

Lower Taxa

... more about "Dyssodia"
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 +
Cavanilles +
decurrent +
compound +  and simple +
(1-)2-3-pinnatisect +
lobed;ovate;linear;ovate;linear;lanceolate;filiform;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +  and orange +
glabrescent +  and subsericeous +
obpyramidal +  and obconic +
fertile +  and bisexual +
fertile +  and bisexual +
North America +, Mexico +, Central America +  and in South America +
Greek dysodia, a bad odor +
puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
cymiform +, corymbiform +, discoid +  and radiate +
in 2s +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
turbinate;campanulate +
sessile +  and petiolate +
deltate +  and lance-deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
coroniform +
6 +  and 12 +
linear;linear-cuneate +
Descr. Pl., +
bearing subulate enations +, hairy +  and bristly +
15 +  and 20 +
exalbuminous +
erect +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Tageteae +
Dyssodia +
Asteraceae (tribe Heliantheae) subtribe Pectidinae +
cylindric +
toothed +  and entire +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
50 cm500 mm <br />0.5 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +