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Taraxia tanacetifolia

Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key

Common Name: EVENING-PRIMROSE FAMILY
Habit: Annual to perennial herb (to tree). Leaf: cauline or basal, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous. Inflorescence: spike, raceme, panicle, or flowers 1 in axils; bracted. Flower: generally bisexual, generally radial, often opening at either dawn or dusk; hypanthium generally prolonged beyond ovary (measured from ovary tip to sepal base); sepals 4(2--7); petals 4(2--7, rarely 0), often fading darker; stamens 2 × or = sepals in number, anthers 2-chambered, opening lengthwise, pollen interconnected by threads; ovary inferior, chambers generally as many as sepals (sometimes becoming 1), placentas axile or parietal, ovules 1--many per chamber, style 1, stigma 4-lobed (or lobes as many as sepals), club-shaped, spheric, or hemispheric. Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like). Seed: sometimes winged or hair-tufted.
Genera In Family: 22 genera, +- 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). Note: Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California.
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner, except as noted
Scientific Editor: Robert Patterson, Bruce G. Baldwin.
Genus: TaraxiaView DescriptionDichotomous Key

Habit: Perennial herb, from thick taproot that may branch in age producing multiple rosettes, stem 0. Leaf: basal, simple, ovate or lanceolate to narrowly elliptic, nearly entire to deeply pinnately lobed. Inflorescence: flowers 1 in axils, erect in bud. Flower: radial, opening at dawn; sepals 4, reflexed separately; petals 4, yellow (or white), unspotted, strongly ultraviolet reflective (non-reflective at base), fading +- purple or +- red; stamens 8, longer ones opposite sepals, anthers attached at base, pollen grains 3-angled except in polyploid taxa (visible with hand lens); ovary chambers 4, stigma hemispheric, generally > anthers and cross-pollinated (or +- = anthers and self-pollinated), sterile projection of ovary persistent with fertile part in fruit, without abscission lines at juncture between hypanthium and fertile part of ovary. Fruit: cylindric-ovoid, +- angled to nearly cylindric, walls generally thin, distended by seeds, tip gradually attenuate into a slender sterile portion (0.4)1.5--18 cm, occasionally persistent for > 1 year, sessile. Seed: in 2 rows per chamber, elongate-ovoid, cylindric to oblong-ellipsoid, pitted or coarsely papillate, giving a shaggy appearance.
Species In Genus: 4 species: California to Washington & southwestern Canada, Nevada to Colorado (especially CA-FP). Etymology: (Leaves similar to Leontodon taraxacoides) Note: Incl in Camissonia in TJM (1993).

Taraxia tanacetifolia (Torr. & A. Gray) Piper
NATIVE
Habit: Hairs +- dense (sparse), short, spreading or appressed. Leaf: 65--320 mm, narrowly elliptic, deeply and irregularly pinnately lobed; petiole 10--80 mm. Flower: hypanthium 4--6.5(8.5) mm; sepals 5.5--13 mm; petals 8--23 mm; sterile tip of ovary 14--55 mm. Fruit: 7--25 mm, long-tapered, swollen by seeds, leathery, +- straight or slightly curved, disintegrating irregularly. Seed: 1.5--2 mm, pitted in rows, pale brown. Chromosomes: 2n=14,28,42.
Ecology: Open fields, moist slopes, clay soils; Elevation: 700--2500 m. Bioregional Distribution: CaR, SN, GB; Distribution Outside California: to Washington, Idaho, Nevada. Flowering Time: May--Jul
Synonyms: Oenothera tanacetifolia Torr. & A. Gray; Camissonia tanacetifolia (Torr. & A. Gray) P.H. Raven; Camissonia tanacetifolia subsp. quadriperforata P.H. Raven
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner
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Citation for this treatment: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner 2016. Taraxia tanacetifolia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=89235, accessed on May 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 29, 2016.


Taraxia tanacetifolia
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© 2003 Steve Matson
Taraxia tanacetifolia
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© 2000 John Game
Taraxia tanacetifolia
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© 2007 Steve Matson
Taraxia tanacetifolia
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© 2010 California Academy of Sciences
Taraxia tanacetifolia
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© 2003 Steve Matson
Taraxia tanacetifolia
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© 2015 Barry Breckling

More photos of Taraxia tanacetifolia in CalPhotos


Geographic subdivisions for Taraxia tanacetifolia:
CaR, SN, GB;
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.