- 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
Polemonium acutiflorum Willd. was reported from ME and NH by Magee and Ahles (1999), P. cuspidatum was reported from ME by Campbell et al. (1995), and P. occidentale Greene was reported from MA by Knowlton and Deane (1923b), but specimens are unknown.
1b. Corolla 10–20 mm long; primary leaves with 11–29 leaflets; plants perennial; stems with few or no stipitate-glands (though eglandular hairs may be present)
2b. Leaflets sessile; stamens and style not or shortly exserted from corolla
Show photos of: Each photo represents one species in this genus.