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J. Chris Pires, except as noted

Perennial herb from corm, outer coat fibrous [membranous]. Leaf: basal, 1–10, linear to narrow-lanceolate. Inflorescence: scapose, generally umbel-like; scape erect, generally 1(2), cylindric, generally rigid, occasionally wavy to twining; flower bracts 2–4[10], not enclosing flower buds. Flower: perianth parts 6 in 2 petal-like whorls, free or ± fused below into tube; staminodes 0 or 3; stamens 3 or 6, free or fused to perianth, occasionally appendaged; ovary superior, chambers 3, ovules 2–several per chamber. Fruit: capsule, loculicidal.
10–11 genera, 60–70 species: western North America. [Pires & Sytsma 2002 Amer J Bot 89:1342–1359] —Scientific Editors: Dale W. McNeal, Thomas J. Rosatti.

Key to Themidaceae


J. Chris Pires & Glenn Keator

Corm spheric, tan; daughter corms sessile. Leaf: 1–3, generally narrow-lanceolate, keeled, glabrous, entire, often withered at flower. Inflorescence: umbel-like, open; bracts ± lanceolate, ± scarious; pedicels ± erect, generally > perianth; flowers generally many. Flower: perianth tube generally funnel-shaped, lobes generally ascending to spreading; stamens 6, attached to perianth tube at 1 level or alternately at 2 levels, equal or short alternating with long, filaments free, appendages forming crown or generally 0, anthers attached at middle, generally angled away from stigma; ovary stalked, style 1, stigma ± 3-lobed. Fruit: generally stalked, ovoid. Seed: ± spheric, black-crusted.
15 species: western North America, especially northern and central California. (Greek: 3 complete, for flower parts in 3s)
Unabridged references: [Hoover 1941 Amer Midl Naturalist 25:73–100]

Key to Triteleia

T. ixioides (W.T. Aiton) Greene
Leaf: 1–2, 10–50 cm, 3–15 mm wide, linear. Inflorescence: scape 10–80 cm, generally smooth (scabrous near base); pedicels 10–90(120) mm, upcurved. Flower: perianth 12–27 mm, straw-colored or gold-yellow striped dark (white flushed purple), tube 3–10 mm, acute at base, lobes 6–20 mm, ascending to reflexed, midvein green, brown, or purple; stamens close to pistil, attached at 1 level, unequal, filaments flat, tip appendages forked, pointed, anthers 1–2 mm, white, cream, yellow, or blue; ovary > stalk. [Online Interchange]

T. ixioides subsp. unifolia L.W. Lenz
Leaf: 1, 10–20 cm. Inflorescence: scape 10–30 cm, smooth or ± scabrous; pedicels 10–40 mm. Flower: perianth pale yellow, tube 5–7 mm, lobes 9–12 mm, spreading; filaments 2–4 mm and 3–5 mm, tip appendages short, straight or incurved, anthers cream or yellow.
n=7,8. Conifer forest, clay, granite soils; 600–2000 m. Cascade Range, n&c Sierra Nevada; southwestern Oregon. May–Jul [Online Interchange]

Previous taxon: Triteleia ixioides subsp. scabra
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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Mar 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Triteleia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Mar 27 2015

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Geographic subdivisions indicated for the distribution of Triteleia ixioides subsp. unifolia 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.
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.