Helianthus radula

(Pursh) Torrey & A. Gray

Fl. N. Amer. 2: 321. 1842.

Common names: Rayless or pineland sunflower
IllustratedEndemic
Basionym: Rudbeckia radula Pursh Fl. Amer. Sept. 2: 575. 1813
Treatment appears in FNA Volume 21. Treatment on page 155. Mentioned on page 141, 143.

Perennials, 50–100 cm (with crown buds). Stems erect, distally densely hispid. Leaves mostly basal; opposite; petioles obscure (intergrading with blades); blades obovate to orbiculate, 4.6–14.5 × 2.1–12 cm, bases broadly cuneate to rounded, margins entire or serrulate, abaxial faces strigoso-hispid, not glanddotted (cauline usually much smaller, alternate distally). Heads usually borne singly. Peduncles 10–20 cm. Involucres shallowly hemispheric, (15–25 ×) 5–8 mm. Phyllaries (often dark purple) 25–33, lanceolate to ovate, 10–14 × 3–5 mm, apices acute to acuminate, abaxial faces hispid or glabrous. Paleae 9–10 mm, subentire to 3-toothed (apices purplish, mucronate). Ray-florets 0 or 2–8; laminae (sometimes purplish) 1–2 (–10) mm. Disc-florets 100–150+; corollas 7–8 mm, lobes reddish; anthers dark, appendages dark. Cypselae 3–4 mm, glabrate; pappi of 2 (often unequal) aristate scales 0.5–2.9 mm. 2n = 34.


Phenology: Flowering fall.
Habitat: Sandy, open pine barrens, flatwoods
Elevation: 0–50+ m

Distribution

V21-369-distribution-map.gif

Ala., Fla., Ga., La., Miss., S.C.

Discussion

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Helianthus radula"
glabrous +, hispid +  and strigoso-hispid +
not tailed +, rounded +  and obtuse +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Edward E. Schilling +
(Pursh) Torrey & A. Gray +
broadly cuneate +  and rounded +
Rudbeckia radula +
4.6 cm46 mm <br />0.046 m <br /> (14.5 cm145 mm <br />0.145 m <br />) +
obovate;orbiculate +
2.1cm;12cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Rayless or pineland sunflower +
reddish +  and yellow +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
compressed +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Fla. +, Ga. +, La. +, Miss. +  and S.C. +
0–50+ m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy, open pine barrens, flatwoods +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
hemispheric +
0.2 cm2 mm <br />0.002 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 +
triangular +
serrulate +  and entire +
2-carpellate +
subentire;3-toothed +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
persistent +
coroniform +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering fall. +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
25 +  and 33 +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
aristate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
exalbuminous +
Illustrated +  and Endemic +
procumbent +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Lagasceinae +
Helianthus radula +
Helianthus +
species +
campanulate +
toothed +  and entire +
300 cm3,000 mm <br />3 m <br /> (500 cm5,000 mm <br />5 m <br />) +
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
shrub +  and subshrub +