Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Thalictrum

View taxon page for Thalictrum

(For a list of species in Thalictrum, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Plant 5–15(20) cm; leaves  (1 cauline), 1.5–6 cm; inflorescence   in fruit ..... T. alpinum

1' Plant 40–200 cm; leaves basal and cauline, 4–46 cm; inflorescence generally ; pedicel ±  in fruit

2. Flowers filaments flat; anthers  to mucronate; fruit body sides generally semicircular to crescent-shaped, beak 1–1.5 mm ..... T. sparsiflorum

2' Flowers unisexual; filaments thread-like; anthers ; fruit body sides obliquely narrowly  to  or widely obovate to ± round, beak 1.5–4.5 mm

3. Fruit generally ribs ± straight; n NCo, nw KR ..... T. occidentale

3' Fruit  to , ribs ± curved; n NCo, nw KR, and elsewhere ..... T. fendleri

4. Fruit body ±  throughout, sides obliquely ± ovate to ± obovate, 2–3-ribbed, veins 0; distal leaves abaxially generally finely glandular-puberulent (at 20×) ..... var. fendleri

4' Fruit 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.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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