- 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
Packera plattensis (Nutt.) W.A. Weber & A. Löve, a species primarily of the Midwest, Great Lakes region, and southern states, continues to be reported from New England (Magee and Ahles 1999). However, the plants responsible for this report were carefully examined and found to be P. paupercula (Barkley 1962). References: Barkley (1962), Trock (2006).
1b. Plants without stolons, or these short and poorly developed, not forming colonies; leaf blades not or very shortly decurrent on petioles; involucral bracts gradually tapering from base or with parallel margins and gradually tapering from near apex
2b. Blade of basal leaves abruptly contracted to the petiole, usually truncate to cordate at the base [Fig. 441]; plants of wet-mesic to hydric soils of fields, low forests, and wetlands
Show photos of: Each photo represents one species in this genus.