Flora of North America species comparison

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

blade ovate to reniform or orbiculate, 25+ mm wide, chartaceous, base cordate to lobate, margins incised-crenate, teeth apices obtuse to rounded, surfaces ± hairy;

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

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.

erect, to 35 cm in fruit;

sterile bracts 2, fan-shaped, largest 2+ cm;

flowers 15–80, loosely aggregated.

erect, to 45 cm in fruit;

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

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

epipetalous.

inserted on receptacle.

ovules 2–7.

ovules 17–40.

glabrous or sparsely hairy along margins.

densely hairy.

4.

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

(3 or)4(or 5), apex laciniate;

corolla blue to lavender with veins deeper colored (except tube yellowish white), ± regular, campanulate, much longer than calyx, glabrous, tube conspicuous.

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.