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Centaurium tenuiflorum
SLENDER CENTAURY

Higher Taxonomy
Family: GentianaceaeView DescriptionDichotomous Key

Common Name: GENTIAN FAMILY
Habit: 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.
Genera In Family: +- 90 genera, 1800 species: worldwide; some cultivated (Eustoma, Exacum, Gentiana). Note: Gentianella tenella moved to Comastoma. Key to genera revised by Bruce G. Baldwin.
eFlora Treatment Author: James S. Pringle, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: CentauriumView DescriptionDichotomous Key

Common Name: CENTAURY
Habit: 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.
Species In Genus: +- 15 species: temperate, dry-mesic tropics, +- Eurasia, northern Africa, Mexico. Etymology: (Latin: centaur, mythological discoverer of plants medicinal properties) Note: Native species moved to Zeltnera.

Centaurium tenuiflorum (Hoffmanns. & Link) Janch.
NATURALIZED
Habit: Annual, generally 2--75 cm. Leaf: basal +- not rosetted, 15--25 mm, obovate to oblong; cauline generally 10--30 mm, lower elliptic-oblong to ovate, upper lanceolate. Inflorescence: dense, generally +- flat-topped; flowers +- sessile. Flower: corolla lobes 2--4.5 mm. Chromosomes: 2n=40.
Ecology: Fields, roadsides, open woodland; Elevation: < 1800 m. Bioregional Distribution: NW (exc NCoRH), CaRF, n SNF, GV, CCo, MP; Distribution Outside California: to Oregon, central United States; native to Eurasia. Flowering Time: Jun--Aug
Synonyms: Centaurium floribundum (Benth.) B.L. Rob., misappl.; Centaurium muehlenbergii (Griseb.) Piper, misappl.
eFlora Treatment Author: James S. Pringle
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botanical illustration including Centaurium tenuiflorum

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Citation for this treatment: James S. Pringle 2016. Centaurium tenuiflorum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=76816, accessed on February 07, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 07, 2016.


Geographic subdivisions for Centaurium tenuiflorum:
NW (exc NCoRH), CaRF, n SNF, GV, CCo, MP;
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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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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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.