glabrate

Sparingly hirsute-pubescent or glabrate; leaves ovate-oblong, usually short-petioled, larger; tube of corolla little exceeding the hardly hirsute calyx.—Va. and Ky. to Ala. Appearing like a hybrid with the next.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Pubescent or glabrate; stem slender, simple, with few large heads terminating slender branchlets; leaves lanceolate, very acute, narrowed to a sessile base, sparingly serrate or serrulate; scales linear-attenuate, equal, mostly herbaceous; rays blue.—N. Dak. and westward.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Slightly tomentose or glabrate, leafy, 1–2° high; divisions of the leaves narrowly linear or filiform, revolute; involucral scales obovate-oblong; achenes long-villous.—Neb. to Ark. and Tex.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

L. mìnor, L. Rather strict, 1° high or more, usually glabrate in age; leaves of radical shoots lanceolate, rigid, 2–3´´ long, the cauline linear, 6–9´´ long; pod about 1´´ high.—Dry and sterile ground; common.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Perennial, branching, puberulent or glabrate, low; leaves narrow, pinnately or bipinnately parted, the lobes and teeth bristle-tipped; heads small, the appressed scales bristle-tipped; achenes pubescent.—Minn. to Kan., and southward.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray