Jepson eFlora
Key to families | Table of families and genera

Key to Thalictrum

View taxon page for Thalictrum

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

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

2' Flowers 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. Fruit generally reflexed, ribs ± straight; n North Coast, nw Klamath Ranges ..... T. occidentale

3' Fruit spreading to ascending, ribs ± curved; n North Coast, nw Klamath Ranges, and elsewhere ..... T. fendleri

4. Fruit 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' 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.) [year] Jepson eFlora, [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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