John Myers Copyright: Flora of North America Association Trees to 20m; trunk to 0.6m diam.; crown narrow, branches sparse. Bark of young trees gray, smooth
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Bor.-Amer. 2: 163. 1838 Treatment appears in FNA Volume 2. Trees to 20m; trunk to 0.8m diam.; crown spirelike. Bark gray, thin, smooth, furrowed in age.
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centuries were S. F. Blake, N. L. Britton, R. S. Ferris, M. L. Fernald, E. L. Greene, H. M. Hall, M. E. Jones, D. D. Keck, P. A. Rydberg, J. K. Small, and
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1819. Theodore M. Barkley†, Luc Brouillet, John L. Strother Treatment appears in FNA Volume 20. Treatment on page 3. Mentioned on page 20, 23, 39, 78, 102
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Heliantheae), a chloroplast DNA analysis. Syst. Bot. 20: 28–39. Urbatsch, L. E., B. G. Baldwin, and M. J. Donoghue. 2000. Phylogeny of the coneflowers and
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present; blades flat, V-shaped, or M-shaped in cross-section, rarely filiform, involute, or rounded, commonly less than 20 mm wide, if flat then with distinct
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this lineage (J. D. Ambrose 1975, 1980; M. Takahashi and S. Kawano 1989; R. W. Cruden 1991; P. Goldblatt 1995; M. N. Tamura 1995, 1998b; W. B. Zomlefer
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E. Janchen 1942; I. A. Al-Shehbaz 1984; M. Koch et al. 1999; O. Appel and Al-Shehbaz 2003; Koch et al. 2003; M. A. Beilstein et al. 2006; Al-Shehbaz et
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Nat. Arts 88: 196. 1819. Theodore M. Barkley†, Luc Brouillet, John L. Strother Treatment appears in FNA Volume 20. Treatment on page 540. Annuals, perennials
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Onopordum, Plectocephalus, Saussurea, Silybum, Volutaria Cassini Theodore M. Barkley†, Luc Brouillet, John L. Strother Basionym: Asteraceae tribe Cynareae Lamarck
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not spread to the surrounding area (P. M. Brown 2002). Bletia patula Hooker is an apparent garden escape (P. M. Brown 2000). A single vegetative specimen
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bracteoles absent. Flowers: post-mature petals pale paper brown; stamens (5–) 10 or 20 (–47), rarely ca. 15, anthers pink to purple or white to cream. Pomes usually
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acuminate, occasionally piliferous from rounded-cucullate base; costa to (20–) 40–100% leaf length, terminal spine present or absent, abaxial surface occasionally
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W. Chen, X. Chen, S.M. Phillips, C. Stapleton, R.J. Soreng, S.G. Aiken, N.N. Tzvelev [Tsvelev], P.M. Peterson, S.A. Renvoize, M.V. Olonova, and K.H. Ammann
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and P. M. Taschereau. 1983. The Genus Atriplex (Chenopodiaceae) in Canada. Ottawa. [Agricu. Canada Monogr. 31.] Bassett, C. W. Crompton, and P. M. Taschereau
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Urospermum, Youngia Lamarck & de Candolle Syn. Pl. Fl. Gall., 255. 1806. Theodore M. Barkley†, Luc Brouillet, John L. Strother Synonyms: Undefined tribe Lactuceae Cassini
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1-locular; placentas parietal, 3–14 [–20+]; style 1; nectary usually forming chamber around base of style; stigma lobes 3–14 [–20+], 1 per placenta. Fruits basically
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usually 1–20, their corollas filiform; corollas of 1–3 pistillate florets in heads of A. bigelovii sometimes ± 2-lobed, weakly raylike). Disc-florets 2–20 (–30+)
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Treatment appears in FNA Volume 9. Treatment on page 491. Mentioned on page 19, 20, 428, 433, 445, 449, 469, 492, 493, 494, 508, 512, 525, 536, 550, 578, 581
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Tripleurospermum Cassini J. Phys. Chim. Hist. Nat. Arts 88: 192. 1819. Theodore M. Barkley†, Luc Brouillet, John L. Strother Treatment appears in FNA Volume
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