- 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
See Schouten and Veldkamp (1985) for rationale of an expanded Anthoxanthum (i.e., one that includes Hierochloe). Reference: Allred and Barkworth (2007).
1a. Inflorescence an open to somewhat compact panicle, the lower branches ascending to wide-spreading or even drooping; glumes subequal in length; each spikelet with 1 bisexual floret and 2 unisexual florets that are staminate
2b. Staminate florets unawned or with short awn-tips to 0.6 (–1) mm long; glumes (2.5–) 3.5–6 mm long; panicle open (less so in subalpine plants), 4–9 (–12.5) cm tall, with 8–100 spikelets; plants with stems produced singly or a few-together on elongate rhizomes
1b. Inflorescence a densely congested panicle, the lower branches appressed to appressed-ascending (briefly somewhat open at anthesis); glumes distinctly unequal in length; each spikelet with 1 bisexual floret and 2 sterile florets
Show photos of: Each photo represents one species in this genus.