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Vascular Plants of California
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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)
Reference: Packer 2003 FNANM 26:61--64
Unabridged Reference: Packer 1993 Novon 3:278--279
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.
Jepson eFlora Author: Dale W. McNeal
Reference: Packer 2003 FNANM 26:61--64
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Triantha occidentalis subsp. occidentalis

botanical illustration including Triantha occidentalis subsp. occidentalis


Citation for this treatment: Dale W. McNeal 2012, Triantha occidentalis subsp. occidentalis, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=89271, accessed on June 05, 2020.

Citation for the whole project: Jepson Flora Project (eds.) 2020, Jepson eFlora,, accessed on June 05, 2020.

Triantha occidentalis subsp. occidentalis
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© 2014 Neal Kramer
Triantha occidentalis subsp. occidentalis
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© 2008 Keir Morse
Triantha occidentalis subsp. occidentalis
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© 2011 Barry Rice
Triantha occidentalis subsp. occidentalis
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© 2006 Steve Matson
Triantha occidentalis subsp. occidentalis
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© 2004 Steve Matson
Triantha occidentalis subsp. occidentalis
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© 2006 George W. Hartwell

More photos of Triantha occidentalis subsp. occidentalis in CalPhotos

Geographic subdivisions for Triantha occidentalis subsp. occidentalis:
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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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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).