Doellingeria umbellata
Gen. Sp. Aster., 178. 1832.
Plants 50–200 cm (short to long-rhizomatous, sometime colonial). Stems 1–10(–20), ascending to erect, striate, glabrous or sparsely hairy. Cauline leaves: mid and distal crowded, blades broadly to narrowly elliptic, (35–)60–110(–150) × (5–) 13–25(–35) mm, ± reduced distally, not stiff, bases attenuate, margins entire, involute, finely ciliate, apices acuminate, faces glabrous or sparsely hairy, especially along veins abaxially, or densely hairy. Heads (3–)20–100(–300+). Peduncles 1–10 mm, moderately to densely canescent; bracts linear-lanceolate to elliptic. Involucres 3–5 mm. Phyllaries in 3–4 series, triangular-lanceolate, midveins not swollen, apices finely subulate, strigose. Rays (2–)5–10(–16); laminae (4–)7–10(–12.3) × (0.8–) 1.2–1.8(–2.7) mm. Disc florets (5–)11–26(–50); corollas 3.5–6 mm, lobes 2–3.2 mm, 60–75% of limb. Cypselae 1.4–3.2 mm, 4–6-ribbed, sparsely to densely strigose; pappi: outer 0.2–0.8 mm, inner 3.5–6.2 mm. 2n = 18.
Distribution
Alta., Man., N.B., N.S., Nfld. and Labr. (Nfld.), Ont., P.E.I., Que., Sask., Ala., Conn., Del., Ga., Ill., Ind., Iowa, Ky., Maine, Mass., Md., Mich., Minn., N.C., N.Dak., N.H., N.J., N.Y., Nebr., Ohio, Pa., R.I., S.C., Tenn., Va., Vt., W.Va., Wis.
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Key
| 1 | Leaves: abaxial faces sparsely piloso-villous (fewer than 10 hairs/mm 2); Newfoundland to Minnesota, s to n Alabama and Georgia | Doellingeria umbellata var. umbellata |
| 1 | Leaves: abaxial faces densely puberulent (more than 12 hairs/mm 2); n Ontario, s Manitoba (disjunct to Alberta) s to Nebraska, Iowa, Illinois | Doellingeria umbellata var. pubens |