What’s a dichotomous key? HelpSee list of 4 species in this genus
- 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
Reference: Reznicek et al. (2002).
1b. Hypogynium present, therefore, the achene with a distinct basal zone of different color and texture; leaf blades 1–9 mm wide; plants perennial, from firm, nodulose rhizomes or annual with fibrous roots in S. reticularis
2b. Achene body dull to sublustrous, either pitted or papillate-verrucose; hypogynium either lobed or with tubercles, without minute papillae; leaf blades 1–3.5 mm wide
3b. Hypogynium without lobes, bearing 6 globose tubercles arranged in 3 pairs; achene body papillate-verrucose, these projections sometimes arranged to provide the appearance of irregular transverse ridges; inflorescence a dense terminal cluster, sometimes with 1 or 2 axillary clusters as well
Show photos of: Each photo represents one species in this genus.