- 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
Section CeratocystisSee list of 3 species in this section
Carex hostiana DC. was reported to occur in Tewksbury, MA (Crins 2002a). However, the extreme disjunction of the plants and occurrence in atypical habitat suggest that the collection is mislabeled. See Fernald (1911) for discussion of this record. Reference: Crins (2002a).
1b. Perigynia 3.5–6.3 mm long, the lower of each spike reflexed; perigynium beak bent at an angle of 13–72 degrees from the perigynium body [Fig. 75]; ligule of apical leaves well formed
Show photos of: Each photo represents one species in this section.