Flora of North America species comparison

strictly annual, disintegrating in 1st year;

blade oblong-ovate to ovate, 25+ mm wide, leathery, base cuneate, truncate, or rounded to lobate, sometimes cordate, margins crenate, teeth apices acute to rounded, surfaces sparsely hairy;

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

strictly annual, disintegrating in 1st year;

blade ovate to slightly cordate, sometimes oblong, 25+ mm wide, leathery, base cuneate, truncate, cordate, or lobate, margins crenate, teeth apices acute, surfaces glabrous or sparsely hairy;

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

erect, to 45 cm in fruit;

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

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

erect, to 10 cm in fruit;

sterile bracts 5–14, ovate-spatulate, largest 1+ cm;

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

inserted on receptacle.

inserted on receptacle.

ovules 17–40.

ovules 17–40.

densely hairy.

glabrous.

4, basal connation between abaxial and adaxial lobes on each side of flower.

4.

1–4, apex entire or erose;

corolla reddish, bluish purple, green, or white, bilabiate or unilabiate, rudimentary, much shorter than calyx, glabrous, lateral and abaxial petals of abaxial lip connate 1/2+ their lengths, abaxial and adaxial petal lips basally adnate to stamens, tube absent.

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

corolla blue, bluish purple, lavender, or reddish, bilabiate, ± rudimentary, tubular, longer than calyx, glabrous, lateral and abaxial petals of abaxial lip connate 1/2+ their lengths, tube absent.