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| Jepson eFlora
Key to families | Table of families and genera This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press. Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link. |
Perennial, stem 0, from thick taproot that may branch in age producing multiple rosettes.
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 yr, sessile.
Seed: in 2 rows per chamber, elongate- ovoid, cylindric to oblong- ellipsoid, pitted or coarsely papillate, giving a shaggy appearance.
4 species: CA to WA & sw Can, NV to CO (especially CA-FP). (Lvs similar to Leontodon taraxacoides) [Wagner et al. 2007 Syst Bot Monogr 83:1–240] Incl in Camissonia in TJM (1993).
Unabridged references: [Raven 1969 Contr US Natl Herb 37:161–396]
1. Lf pinnately lobed; plant hairs ± dense, spreading or appressed; hypanthium 4–8.5 mm; stigma exceeding anthers ..... T. tanacetifolia
1' Lf not pinnately lobed (or plant ± glabrous); hypanthium 1.5–3 mm; stigma at same level as or slightly exceeding anthers
2. Lf hairs short, erect; fruit ± cylindric (swollen by seeds), papery ..... T. ovata
2' Lf ± glabrous; fruit 4-angled, barely swollen by seeds, leathery ..... T. subacaulis
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.