Flora of North America species comparison

1–5, terminal from caudex, erect or nearly so.

6–100+, terminal from caudex, erect or decumbent.

cauline, ± evenly spaced;

blade widely ovate to elliptic, 1.5–4 cm × 8–22 mm, apex obtuse.

cauline, ± evenly spaced;

blade ovate, 3–15 cm × 10–55 mm, apex acuminate.

solitary flowers or occasionally a terminal pair.

1–20-flowered heads, sometimes with additional flowers at 1–3 nodes.

calyx 8–12 mm, tube cleft to base or nearly so into 2 spathaceous segments, lobes elliptic to ovate-lanceolate, 0.5–5 mm, margins not ciliate;

corolla bright blue, campanulate, open, 30–38 mm, lobes widely ovate-triangular, 6–11 mm, free portions of plicae spreading, low-triangular, less than 1 mm, notched at apex, otherwise entire;

anthers distinct.

calyx 15–35(–45) mm, lobes spreading nearly horizontally when fresh, obovate, elliptic, ovate, orbiculate, or rhombic, 3–25(–35) mm, often strongly unequal, margins ciliate;

corolla blue, ± loosely closed, 30–55 mm, lobes ± incurved to nearly erect, ovate-triangular, 2.5–5 mm, free portions of plicae ± as long and wide as lobes, oblong, deeply and unequally bifid, summit erose;

anthers connate.

not winged.

winged.