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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Annual to perennial herb [to trees]. Stem: decumbent to erect, < 2 m, simple or branched. Leaf: simple, cauline, sometimes also basal, opposite or whorled, entire, sessile or basal ± petioled; stipules 0. Flower: bisexual, radial, parts in 4s or 5s except pistil 1; sepals fused, persistent; petals fused, ± persistent, sinus between lobes often unappendaged; stamens epipetalous, alternate corolla lobes; ovary superior, chamber 1, placentas parietal, often intruding, stigmas 1–2. Fruit: capsule, 2-valved. Seed: many.
± 90 genera, 1800 species: worldwide; some cultivated (Eustoma, Exacum, Gentiana). [Struwe & Albert 2002 Gentianaceae. Cambridge Univ Press] Gentianella tenella moved to Comastoma. Key to genera revised by Bruce G. Baldwin. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Wood & Weaver 1982 J Arnold Arbor 63:441–487; Struwe & Albert 2002 Gentianaceae: Systematics and Natural History. Cambridge Univ Press]
Key to Gentianaceae
Perennial herb (non-flowering rosettes preceding flower-stems, plants dying after flowering in Frasera albomarginata, Frasera parryi, Frasera puberulenta, Frasera speciosa, and Frasera umpquaensis; non-flowering rosettes appearing with flower-stems in others). Leaf: basal ± petioled; cauline opposite or whorled, < basal, base often fused-sheathing. Inflorescence: cyme or panicle of dense clusters. Flower: parts in 4s; calyx fused near base, lobes lanceolate; corolla rotate (bell-shaped), lobes >> tube, ridge between stamens fringed or scaled or 0, nectary pits prominent, 1(2) per lobe, margins of openings variously fringed; ovary sessile, style long and well differentiated or short and poorly differentiated, persistent, entire, stigmas 2.Key to Frasera
± 15 species: temperate North America. (J. Fraser, Scottish collector of North America plants, 1750–1811) [von Hagen & Kadereit 2002 Syst Bot 27:548–572]
Unabridged references: [St. John 1941 Amer Midl Naturalist 21:1–29]
Plant 6–16 dm, glabrous. Stem: 1 or 2. Leaf: white-margined; basal 5–25 cm, 8–40 mm wide, strap-shaped to elliptic-oblanceolate, tips acute; cauline opposite, ovate to lance-oblong, tips acute to acuminate. Inflorescence: open; pedicels 6–32 mm. Flower: calyx 8–17 mm; corolla 9–20 mm, light green, purple-dotted, lobes obovate, short-acuminate, ridge between stamens low, fringed, nectary pit 1 per lobe, U-shaped.
Dry, open woodland, chaparral; 100–1900 m. South Coast, San Gabriel Mountains, San Bernardino Mountains, Peninsular Ranges; Arizona, Baja California. [Swertia parryi (Torr.) Kuntze] Apr–Jul [Online Interchange]
Previous taxon: Frasera neglecta
Next taxon: Frasera puberulenta
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 31 2014
Citation for this treatment: [Author of taxon treatment] 2013. Frasera, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=26085, accessed on Jul 31 2014
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