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- 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 PorocystisSee list of 5 species in this section
Reference: Ball (2002d).
2a. Perigynia densely pilose; lateral spikes 2–4 mm wide; leaves with ligules longer than wide
2b. Perigynia glabrous or sparsely pilose; lateral spikes (3–) 4–11 mm wide; leaves with ligules shorter than wide to as long as wide (rarely longer than wide)
Show photos of: Each photo represents one species in this section.