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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 from caudex or rhizomes, generally glabrous; dioecious or flowers bisexual.
Stem: 1–few, generally erect; branches 0 or few.
Leaf: 1–4- ternate or pinnate, basal or basal and cauline, alternate, generally reduced distally on stem; leaflets wedge-shaped to ± round, entire, crenate, or lobed; pale green abaxially, generally green adaxially.
Inflorescence: raceme or panicle, axillary or terminal, generally erect, ± scapose or not; bracts simple to 1- ternate; pedicels generally erect in fruit.
Flower: sepals 4–5, ± green-white to ± purple, petal-like or not, generally early- deciduous; petals 0; stamens 8–many, generally > sepals, filaments flat or generally thread-like, anthers generally narrowly oblong, tip generally pointed; pistils (1)2–22.
Fruit: achene, compressed laterally or not, ribbed or veined, beaked.
120–200 species: temperate North America, Eurasia, Africa; some ornamental, medicinal. (Greek: name given by Dioscorides, Greek physician-botanist) [Park & Festerling 1997 FNANM 3:258–271]
1. Plant 5–15(20) cm; leaves basal (1 cauline), 1.5–6 cm; inflorescence raceme; pedicel recurved in fruit ..... T. alpinum
1' Plant 40–200 cm; leaves basal and cauline, 4–46 cm; inflorescence generally panicle; pedicel ± erect in fruit
2. Fls bisexual; filaments flat; anthers obtuse to mucronate; fruit body sides generally semicircular to crescent-shaped, beak 1–1.5 mm ..... T. sparsiflorum
2' Fls unisexual; filaments thread-like; anthers acuminate; fruit body sides obliquely narrowly ovate to fusiform or widely obovate to ± round, beak 1.5–4.5 mm
3. Fr generally reflexed, ribs ± straight; n NCo, nw KR ..... T. occidentale
3' Fr spreading to ascending, ribs ± curved; n NCo, nw KR, and elsewhere ..... T. fendleri
4. Fr body ± compressed throughout, sides obliquely ± ovate to ± obovate, 2–3-ribbed, veins 0; distal leaves abaxially generally finely glandular-puberulent (at 20×) ..... var. fendleri
4' Fr body compressed generally only near margins, sides obliquely ± widely obovate to ± round, generally 1-ribbed, veins several, wavy, net-like; distal leaves abaxially generally glabrous ..... var. polycarpum
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].
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