Rudbeckia amplexicaulis

Vahl

Skr. Naturhist. Selsk. 2(2): 29, plate 4. 1793.

Common names: Clasping or clasping-leaf coneflower
IllustratedEndemic
Synonyms: Dracopis amplexicaulis (Vahl) Cassini
Treatment appears in FNA Volume 21. Treatment on page 46.

Leaf blades 3–15 × 0.5–4 cm. Involucres 1–4 cm diam. Phyllaries spreading to reflexed, green, linear to lanceolate, herbaceous. Ray laminae spreading, eventually reflexed, elliptic to obovate, 12–30 × 7–15 mm, abaxially hirsute. Disc corollas 2.8–3.5 mm. Cypselae: each face 4–5-striate and minutely cross-rugose, glabrous; pappi 0 (cypselae each with ring of tan tissue at apex, ca. 0.1 mm). 2n = 32.


Phenology: Flowering late spring–summer.
Habitat: Open sites, moist soils
Elevation: 0–400 m

Distribution

V21-88-distribution-map.gif

Ala., Ark., Fla., Ga., Ill., Kans., La., Miss., Mo., N.Mex., N.Dak., Okla., S.C., Tex.

Discussion

Rudbeckia amplexicaulis grows mainly in the Gulf coastal plain and Mississippi Embayment. It may be adventive elsewhere. It is used in “native” meadow and roadside plantings and has become a problem in some agricultural crops.

Selected References

None.

Lower Taxa

None.
... more about "Rudbeckia amplexicaulis"
Lowell E. Urbatsch +  and Patricia B. Cox +
Obeliscaria subg. Dracopis +
Clasping or clasping-leaf coneflower +
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Kans. +, La. +, Miss. +, Mo. +, N.Mex. +, N.Dak. +, Okla. +, S.C. +  and Tex. +
0–400 m +
Open sites, moist soils +
Flowering late spring–summer. +
Skr. Naturhist. Selsk. +
Illustrated +  and Endemic +
Dracopis amplexicaulis +
Rudbeckia amplexicaulis +
Rudbeckia sect. Dracopis +
species +