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Triantha occidentalis subsp. occidentalis

Higher Taxonomy
Family: TofieldiaceaeView Description 

Habit: Perennial herb, rhizomes short, spreading. Stem: erect, +- glabrous near base, dense-glandular-hairy above [or not]. Leaf: generally basal, +- 2-ranked, +- linear; cauline 0--3, on lower 1/3 of stem, sheathing. Inflorescence: terminal raceme, +- head- or spike-like, generally longer in fruit. Flower: perianth parts 6 in 2 petal-like whorls, white to +- green or +- yellow; stamens 6, filaments +- flat, glabrous, wider at base, anthers attached at base; ovary superior, stalked, 3-lobed, chambers 3, styles 3. Fruit: capsule [follicle], 3-beaked from persistent styles, septicidal below, loculicidal above. Seed: +- brown; coat white, loose, spongy, inflated; appendage generally at 1 end, rarely 0 or at both ends.
Genera In Family: 3 genera, 18 species: southeastern United States, northwestern South America, northern temperate. Note: Tofieldia occidentalis moved to Triantha.
eFlora Treatment Author: Dale W. McNeal
Scientific Editor: Thomas J. Rosatti.
Genus: TrianthaView Description 

Stem: scapose, 30--80 cm. Inflorescence: axes +- glandular-hairy; flowers in clusters of 2--7, each cluster subtended by cluster of +- few bracts; bractlets 3, fused, appearing calyx-like. Flower: perianth parts in +- dissimilar whorls, free, persistent. Fruit: ovoid to wide-ellipsoid.
Species In Genus: 4 species: North America, Japan. Etymology: (Greek: tri, 3 and anthos, flower, alluding to flowers aggregated in 3s)

Triantha occidentalis (S. Watson) R.R. Gates subsp. occidentalis
Leaf: 5--20 cm, 3--8 mm wide. Inflorescence: 1--3 cm (to 7 cm in fruit), +- spheric to ovoid-cylindric; pedicels 1--6 mm. Flower: perianth 3--6 mm, parts oblong-ovate, inner narrower, > outer; stamens +- = perianth; styles 1.3--3 mm. Fruit: 5--9 mm. Seed: generally 1, 0.5--1.5 mm, 1--3 × longer than wide, red-brown; appendages (0)1(2). Chromosomes: 2n=30.
Ecology: Wet meadows, bogs; Elevation: < 3100 m. Bioregional Distribution: NW, CaR, SNH; Distribution Outside California: southwestern Oregon. Flowering Time: Jul--Sep
Synonyms: Tofieldia occidentalis S. Watson subsp. occidentalis
Unabridged Note: Other subspecies. Oregon to Alaska, Montana, Wyoming.
eFlora Treatment Author: Dale W. McNeal
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botanical illustration including Triantha occidentalis subsp. occidentalis


Citation for this treatment: Dale W. McNeal 2017. Triantha occidentalis subsp. occidentalis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 16, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 16, 2017.

Triantha occidentalis subsp. occidentalis
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© 2006 George W. Hartwell
Triantha occidentalis subsp. occidentalis
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© 2014 Neal Kramer
Triantha occidentalis subsp. occidentalis
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© 2010 Neal Kramer
Triantha occidentalis subsp. occidentalis
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© 2001 Gary A. Monroe
Triantha occidentalis subsp. occidentalis
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© 2006 Steve Matson
Triantha occidentalis subsp. occidentalis
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© 2016 Keir Morse

More photos of Triantha occidentalis subsp. occidentalis in CalPhotos

Geographic subdivisions for Triantha occidentalis subsp. occidentalis:
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.
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.