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Anemone

See list of 9 species in this genus

Anemone is circumscribed broadly to include Hepatica based on the phylogenetic work of Hoot et al. (1994). Reference: Dutton et al. (1997).

  • 1a. Leaves dimorphic—the basal ones with 3 (–5)-lobed blades [Fig. 808], the stem ones subtending the flower with simple, lanceolate blades; stem leaves closely subtending the flower
    • 2a. Apex of leaf lobes rounded to bluntly pointed; sinuses, at most, extending to middle 
of leaf blade; stem leaves (i.e., bracts) rounded at the apex; achenes 1–1.4 mm wide
    • 2b. Apex of leaf lobes acute to acuminate [Fig. 808]; sinuses indented beyond middle of leaf blade [Fig. 808]; bracts acute to obtuse at the apex; achenes 1.4–1.8 mm wide
  • 1b. Leaf blades compound or lobed with deep sinuses in A. canadensis, the basal and cauline ones ± similar; stem leaves remotely subtending the flower
    • 3a. Carpels and achenes glabrous or thinly pubescent, but not tomentose [Fig. 809]; achenes in capitate to spherical clusters; plants with rhizomes (these tuberous in A. blanda)
    • 3b. Carpels and achenes densely pubescent, the achenes with long, tomentose hairs [Fig. 810]; achenes in oblong to cylindric clusters; plants commonly without rhizomes
      • 7a. Leaf blades dissected into numerous, narrow segments (1.5–) 2–3.5 (–5) mm wide, those subtending the inflorescence sessile or nearly so; styles deciduous from achenes
      • 7b. Leaf blades divided into 3–5 broad segments (4–) 6–30 (–40) mm wide, those subtending the inflorescence distinctly petioled; styles persistent on achenes
        • 8a. Inflorescence subtended by (3–) 5–9 leaves (i.e., involucral bracts); peduncles naked; cluster of achenes 2–4.5 cm tall, 2–5 times as tall as broad; styles crimson; beak of the achene 0.3–1 mm long
        • 8b. Inflorescence subtended by 2–3 (–5) leaves; peduncles with 2 additional subtending leaves; cluster of achenes 1.5–3 cm tall, mostly 1–1.5 times as tall as broad; styles pale or crimson-tipped; beak of the achene 1–1.5 mm long

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