Flora of North America species comparison

strictly annual, disintegrating in 1st year;

blade elliptic or ovate to broadly ovate, 25+ mm wide, leathery, base rounded to lobate or cordate, margins crenate, teeth apices obtuse to rounded, surfaces hairy;

basal veins extending into distal 1/2 of blade, lateral veins 3–6 on each side of midvein.

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

blade orbiculate to reniform, 25+ mm wide, not leathery, base cordate to lobate, margins ± incised-crenate to dentate, teeth apices rounded to acute or acuminate, surfaces glabrous, rarely sparsely hairy;

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

erect, to 40 cm in fruit;

sterile bracts 10–30, ovate-spatulate, largest 1+ cm;

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

erect, to 33 cm in fruit;

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

flowers 12–100, loosely aggregated.

epipetalous.

epipetalous.

puberulent to villous;

ovules 17–40.

ovules 10–16.

hairy.

glabrous or glabrescent.

4.

4.

(3 or)4, apex entire or erose;

corolla yellow, bilabiate, tubular to ellipsoid, longer than calyx, hairy, lateral and abaxial petals connate ca. 1/2 their lengths, tube conspicuous.

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

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