- Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
Collections of putative Verbascum lychnitis ×V. thapsus from Nantucket County, MA, require more study. The specimens— MacKeever N672 ( GH!) and MacKeever N822 ( NEBC!) appear referable to V. phlomoides. Reference: Ferguson (1972).
1b. Plants pubescent with compound, eglandular hairs; some of the filaments pubescent, usually the 3 upper (i.e., shorter) ones pubescent with white to yellow hairs and the 2 lower (i.e., longer) ones glabrous or nearly so (pubescent with purple hairs in V. nigrum); capsules ellipsoid to ovoid, densely pubescent
2b. At least the upper 3 filaments pubescent with white to yellow hairs; bracts 8–40 mm long; basal leaf blades cuneate to rounded at the base
3b. Axis of inflorescence unbranched (though a given plant may have more than 1 inflorescences); calyx 5–12 mm long; anther decurrent on the filament
4b. Stigma spatulate, decurrent on the sides of the style; inflorescence less dense at maturity, the flowers spaced enough to expose the axis of the spike [Fig. 908]; corolla (20–) 25–45 (–55) mm wide
Show photos of: Each photo represents one species in this genus.