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Taraxia subacaulis

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 subacaulis (Pursh) Rydb.
NATIVE
Habit: Plant +- fleshy, +- glabrous. Leaf: blade 20--220 mm, lanceolate to narrowly elliptic, +- entire to irregularly pinnately lobed, rarely sparsely and minutely strigose; petiole 10--120 mm. Flower: erect; hypanthium 1.5--3 mm; sepals 4.1--13 mm; petals 5--16 mm; sterile tip of ovary 15--80 mm. Fruit: 11--28 mm, linear-ovoid, 4-angled, barely swollen by seeds, +- straight or slightly curved, leathery; pedicel 0--10 mm. Seed: 1.3--1.9 mm, pitted, pale brown. Chromosomes: 2n=14.
Ecology: Moist meadows, generally clay soils; Elevation: 450--2600 m. Bioregional Distribution: SN, GB; Distribution Outside California: to Washington, Montana, Colorado. Flowering Time: May--Jul
Synonyms: Camissonia subacaulis (Pursh) P.H. Raven; Oenothera subacaulis (Pursh) Garrett; Oenothera subacaulis var. taraxacifolia (S. Watson) Jeps.
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 subacaulis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=89234, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 01, 2016.


Taraxia subacaulis
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© 2008 Steve Matson
Taraxia subacaulis
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© 2015 Aaron Schusteff
Taraxia subacaulis
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© 2012 Barry Breckling
Taraxia subacaulis
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© 1981 Gary A. Monroe
Taraxia subacaulis
click for enlargement
© 2008 Steve Matson
Taraxia subacaulis
click for enlargement
© 2008 Steve Matson

More photos of Taraxia subacaulis in CalPhotos


Geographic subdivisions for Taraxia subacaulis:
SN, GB;
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.
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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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Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.