Jepson eFlora: Taxon page
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Zeltnera trichantha
ALKALI 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: ZeltneraView DescriptionDichotomous Key

Common Name: CENTAURY
Habit: Annual, glabrous. Stem: erect, generally branched. Leaf: cauline, opposite (sometimes also basal). Inflorescence: cyme. Flower: parts in 4s or generally 5s; calyx lobes >> tube (discounting thin membrane between lobes in Zeltnera davyi), appressed to corolla tube, generally not keeled; corolla salverform, white or generally pink, lobes <= tube, +- entire, scales 0, nectaries pits 0 (nectaries elsewhere 0); stamens often initially curved to 1 side, dehisced anthers spirally twisted; ovary sessile, style generally thread-like, deciduous, entire or cleft < 1 mm, stigmas 1, 2-lobed, or 2, stigmas or lobes wedge- to fan-shaped.
Species In Genus: +- 25 species: temperate, dry-mesic tropics, North America, South America. Etymology: (L. Zeltner, N. Zeltner, Swiss botanists, b. 1938, 1934) Note: Variable, difficult; further study needed, especially of chromosome numbers, hybridization. Zeltnera calycosa (Buckley) G. Mans. [Centaurium calycosum (Buckley) Fernald] not in California.

Zeltnera trichantha (Griseb.) G. Mans.
NATIVE
Habit: Plant 5--45 cm. Leaf: cauline, 10--40 mm, ovate to lanceolate. Inflorescence: +- dense, units +- flat-topped; pedicels 0--3(6) mm. Flower: corolla 12--22 mm, lobes (3)5--10 mm, linear to lance-oblong, tip acute to acuminate; stigma 1, +- 2-lobed. Chromosomes: 2n=34.
Ecology: Alkaline and saline flats, dry to moist openings in chaparral, around hot springs, vernal pools; Elevation: < 800 m. Bioregional Distribution: NCoRI, SnFrB. Flowering Time: May--Aug Note: Apparently hybridizes with Zeltnera venusta, especially in Sonoma Co.
Synonyms: Centaurium trichanthum (Griseb.) B.L. Rob.
eFlora Treatment Author: James S. Pringle
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Previous taxon: Zeltnera namophila
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botanical illustration including Zeltnera trichantha

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Citation for this treatment: James S. Pringle 2016. Zeltnera trichantha, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=81830, accessed on August 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on August 30, 2016.


Geographic subdivisions for Zeltnera trichantha:
NCoRI, SnFrB.
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.