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Antennaria
See list of 4 species in this genusDiploid 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).
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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)
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2a. Middle and upper stem leaves blunt- to aristate-tipped [Fig. 373], only the leaves of the capitulescence with a scarious appendage (in part)
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2b. Middle and upper stem leaves tipped by a flat or involute-margined, scarious appendage [Fig. 374]
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3a. New rosette leaves bright green and promptly glabrous on the adaxial surface (in part)
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3b. New rosette leaves white or gray-green and tomentose on the adaxial surface
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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]
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4a. Carpellate involucre 5–7 mm tall; central corollas 2.5–4.3 mm long; body of cypselas 1–1.5 mm long; mature pappus 4–5.5 mm long
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4b. Carpellate involucre (6–) 7–10 mm tall; central corollas 4.5–7 mm long; body of cypselas 1.3–2.2 mm long; mature pappus 6–9 mm long
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Each photo represents one species in this genus.