Jepson eFlora
Key to families | Table of families and genera

Key to Thalictrum

View taxon page for Thalictrum

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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