- 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
Diploid species of Antennaria— A. neglecta and A. plantaginifolia—routinely produce staminate individuals within populations, whereas polyploid species— A. howellii and A. parlinii—do not, or do so with great rarity. Therefore, noting the sex of plants observed in populations on herbarium labels can be useful for later reviewers. Also, whole plant collections, which include the stolons and their rosettes (if formed) are much more valuable than single-stem collections. Reference: Bayer (2006).
1a. Rosette leaves smaller, 2–15 (–21) mm wide, 1-veined or sometimes with 2 additional, evanescent, lateral veins, the lateral veins (when present) located ⅔ to ¾ the distance from the midrib to the margin (i.e., near the margin)
2b. Middle and upper stem leaves tipped by a flat or involute-margined, scarious appendage [Fig. 374]
1b. Rosette leaves larger, (7–) 15–55 mm wide, with 3 or 5 prominent veins, the pair of lateral veins closest to the midrib located ⅓ to ½ the distance from the midrib to the margin (i.e., near the center of each half of the leaf blade) [Fig. 375]
Show photos of: Each photo represents one species in this genus.