Tetragonotheca helianthoides

Linnaeus

Sp. Pl. 2: 903. 1753.

IllustratedEndemic
Treatment appears in FNA Volume 21. Treatment on page 179. Mentioned on page 178.

Stems patently to retrorsely ± villous. Leaves cauline, not connate-perfoliate; blades ovate to rhombic or lanceolate, 7–20 × 3–13 cm, coarsely toothed. Ray-florets 6–14; laminae 15–40+ mm. Cypselae ± ovoid, 4–6 mm; pappi 0.2n = 34.


Phenology: Flowering mid spring–early summer.
Habitat: Sandy soils, often in thickets
Elevation: 0–400 m

Distribution

V21-439-distribution-map.gif

Ala., Fla., Ga., Miss., N.C., S.C., Tenn., Va.

Discussion

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
Linnaeus +
decurrent +
compound +  and simple +
7 cm70 mm <br />0.07 m <br /> (20 cm200 mm <br />0.2 m <br />) +
toothed;ovate;rhombic or lanceolate +
3 cm30 mm <br />0.03 m <br /> (13 cm130 mm <br />0.13 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
glabrous +  and strigose +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Fla. +, Ga. +, Miss. +, N.C. +, S.C. +, Tenn. +  and Va. +
0–400 m +
puberulent +, hispidulous +  and glabrate +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy soils, often in thickets +
cymiform +, corymbiform +, discoid +  and radiate +
in loose , corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
obpyramidal;hemispheric +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
not connate-perfoliate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
entire +  and erose +
persistent +
1 +  and 10 +
subulate +  and acerose +
Flowering mid spring–early summer. +
10 +  and 25 +
unequal +  and subequal +
bearing subulate enations +, hairy +  and bristly +
16 +  and 30 +
spatulate +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Tetragonotheca helianthoides +
Tetragonotheca +
species +
cylindric +
ampliate +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
150 cm1,500 mm <br />1.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +
shrub +  and subshrub +