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Key to families | Table of families and genera

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GENTIANACEAE GENTIAN FAMILY

James S. Pringle, except as noted

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

CENTAURIUM CENTAURY
Annual, biennial, glabrous. Stem: erect, branched or simple below inflorescence. Leaf: cauline, opposite, also basal or not. Inflorescence: cyme. Flower: parts generally in 5s; calyx lobes >> tube (discounting thin membrane between lobes in Centaurium tenuiflorum), ± appressed to corolla tube; corolla salverform, generally pink, lobes < tube, elliptic-oblong, entire or minutely toothed at tip, scales 0, nectary pits 0 (nectaries elsewhere 0); stamens initially curved to 1 side, dehisced anthers spirally twisted; ovary sessile, style thread-like (much wider than filaments), cleft 0.5–1 mm, deciduous, stigmas 2, elliptic to ovate.
± 15 species: temperate, dry-mesic tropics, ± Eurasia, northern Africa, Mexico. (Latin: centaur, mythological discoverer of plants medicinal properties) Native species moved to Zeltnera.

Key to Centaurium

C. pulchellum (Sw.) Hand.-Mazz. et al. LESSER CENTAURY
WAIF
Annual, 2–25(30) cm. Leaf: basal not rosetted, 5–25 mm, obovate to oblong; cauline 5–15(25) mm, lower elliptic-oblong, upper lanceolate. Inflorescence: open, generally not flat-topped; pedicels 1–5(11) mm. Flower: corolla lobes 2–5 mm.
2n=36. Moist fields, roadsides; ± 60 m. San Joaquin Valley; to Washington, eastern United States; native to Eurasia. Found once in California (Stanislaus Co.); no recent records, but to be expected.
Unabridged note: Expanded author citation: Centaurium pulchellum (Sw.) Hayek ex Hand.-Mazz., Stadlm., Janch. & Faltis
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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 20 2014
Citation for this treatment: [Author of taxon treatment] 2012. Centaurium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=18584, accessed on Apr 20 2014

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Bioregions in which Centaurium pulchellum occurs Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.