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 broadly to narrowly lanceolate to ovate, 25+ mm wide, leathery, base cuneate, rounded, lobate, or cordate, margins crenate or incised-crenate, teeth apices acute to rounded, surfaces hairy;

basal veins extending into distal 1/2 of blade, lateral veins 3–8 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 47 cm in fruit;

sterile bracts 10–25, ovate to 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.

densely hairy.

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

2–4, all lobes connate, if 2+ lobes, then connate for at least 1/2 of length on abaxial side.

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.

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