original species Synonyms: Megalodonta Greene Treatment appears in FNA Volume 21. Treatment on page 205. Mentioned on page 184, 185, 206. Annuals or perennials
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Uppsala University, predecessors of Linnaeus Treatment appears in FNA Volume 21. Treatment on page 44. Mentioned on page 43, 45. Annuals, perennials, subshrubs
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compound; petals absent. Enemion 21 Leaf segments lobed, margins sharply toothed; sepals persistent in fruit. Helleborus 21 Leaf segments cleft or parted
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Barkley†, Luc Brouillet, John L. Strother Treatment appears in FNA Volume 21. Treatment on page 415. Mentioned on page 3, 5, 309, 456. Annuals, biennials
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Treatment appears in FNA Volume 9. Treatment on page 398. Mentioned on page 21, 412, 414, 415, 416. Shrubs, subshrubs, or herbs, perennial (Aruncus); unarmed
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pistillate) florets usually (6–) 7–50 (–60) in 1 series and laminae (3–) 5–18 (–21) × 0.8–2.8 mm, sometimes 14–110+ in 2–5+ series (sect. Conyzopsis) and laminae
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Treatment on page 50. Mentioned on page 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 49. Herbs or shrubs, sometimes vines in Asparagus, perennial, mostly geophytic
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Treatment appears in FNA Volume 9. Treatment on page 326. Mentioned on page 21, 327. Plants unarmed. Leaves alternate, simple, sometimes pinnately compound
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the subtribe Sonchinae (Asteraceae): Evidence from ITS sequences. Syst. Bot. 21: 417–432. Lee, J., B. G. Baldwin, and L. D. Gottlieb. 2002. Phylogeny of Stephanomeria
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wide. > 21 21 Pollen sacs 0.3–1.2 mm, opposite; corollas 7–22 mm, throats 2-ridged abaxially, sometimes rounded. 26b.12. Penstemon sect. Penstemon 21 Pollen
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emarginate, or with teeth less than 0.2 mm. > 21 21 Proximal pistillate scales 10+ mm. Carex sect. Phyllostachyae 21 Proximal pistillate scales less than 10
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Treatment appears in FNA Volume 9. Treatment on page 57. Mentioned on page 21, 22, 58, 73. Shrubs [trees], subshrubs, or herbs, perennial; unarmed. Leaves
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(Asteraceae: Eupatorieae) Sida 21: 815–826. Nesom, G. L. 2005. Infrageneric classification of Liatris (Asteraceae: Eupatorieae). Sida 21: 1305–1321. Liatris acidota
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FNA Volume 26. Treatment on page 413. Mentioned on page 15, 17, 18, 19, 20, 21, 51, 303, 414. Plants usually perennial, occasionally epiphytic, sometimes
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Barkley†, Luc Brouillet, John L. Strother Treatment appears in FNA Volume 21. Treatment on page 42. Mentioned on page 6, 43, 64, 135. Annuals, biennials
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ETS) data: Reinstatement of Herrickia and a new genus, Triniteurybia. Sida 21: 889–900. Cronquist, A. and D. D. Keck. 1957. A reconstitution of the genus
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enlarged peripheral corollas of type species Treatment appears in FNA Volume 21. Treatment on page 400. Mentioned on page 5, 182, 364, 365, 366, 395, 401
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callus, alluding to calloused cypselae margins Treatment appears in FNA Volume 21. Treatment on page 317. Mentioned on page 333, 334. Annuals, perennials, subshrubs
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linear, lanceolate, or, rarely, ovate > 21 21 Late-season flowers apetalous; basal leaves not rosulate > 22 21 Late-season flowers with petals; basal leaves
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Hymenatherum (Cassini) Strother Hymenatherum Treatment appears in FNA Volume 21. Treatment on page 239. Mentioned on page 221, 222. Annuals, perennials, subshrubs
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