Flora of North America species comparison

persistent, some withering in 2d year as new leaves expand;

blade ± orbiculate, reniform, or cordate, 25+ mm wide, not leathery, base cordate or lobate, margins ± laciniate, sometimes palmately lobed or incised-crenate, teeth apices obtuse to rounded, surfaces glabrous or sparsely hairy;

basal veins usually extending into distal 1/2 of blade, lateral veins 2–4 on each side of midvein.

strictly annual, disintegrating in 1st year;

blade broadly elliptic to lanceolate, 25+ mm wide, leathery, base truncate to tapered, margins crenate, teeth apices acute to rounded, surfaces hairy;

basal veins extending through proximal 1/2 of blade, lateral veins 5–12 on each side of midvein.

erect, to 20 cm (usually less than 25 cm in fruit);

sterile bracts 3+, ovate-spatulate, largest 1+ cm;

flowers 15–40, loosely aggregated.

erect, to 40 cm in fruit;

sterile bracts 10–40, ovate-spatulate, largest 1+ cm;

flowers 100+, densely aggregated (separating in fruit).

epipetalous.

inserted on receptacle, but abaxial and adaxial petal lips basally adnate to stamens.

ovules 10–16.

glabrous or sparsely hairy at apex;

ovules 17–40.

glabrous.

glabrous.

4.

4.

(3 or)4(or 5), apex entire or erose;

corolla blue, ± regular, campanulate, much longer than calyx, glabrous, tube conspicuous.

3(or 4), apex entire or erose;

corolla yellow, bilabiate, ellipsoid, longer than calyx, puberulent on margins, lateral and abaxial petals of abaxial lip connate 1/2+ their lengths, abaxial and adaxial petal lips basally adnate to stamens, tube absent.