- 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
The bur-like fascicles (in our species) of Cenchrus have two cycles of bristles. The outer bristles are positioned closer to the pedicel, are usually retrorsely oriented, and are terete to flattened in cross-section (depending on the species). The inner bristles are fused into a cupule with the apical portions distinct, vary from spreading to erect, and are flattened in cross-section. Reports of C. tribuloides from New England were based on collections of C. longispinus (mostly) and C. spinifex. Reference: Stieber and Wipff (2003).
Show photos of: Each photo represents one species in this genus.