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

Key to Populus

View taxon page for Populus

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

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

1. Leaf  white-tomentose abaxially ..... P. alba

1' Leaf blade glabrous or hairy abaxially

2. Leaf blade  ..... P. angustifolia

2' Leaf blade , ± round, , rhomboid, or  (sometimes lanceolate on suckers or stressed plants of Populus trichocarpa)

3. Leaf blade rhomboid or deltate, margin , or coarsely scalloped

4. Leaf blade deltate, margin coarsely scalloped ..... P. fremontii subsp. fremontii

4' Leaf blade deltate to rhomboid, margin crenate to serrate ..... P. nigra

3' Leaf blade ovate to ± round, margin finely scalloped

5. Leaf blade widely ovate to ± round, 2–4(7) cm,  laterally  ..... P. tremuloides

5' Leaf blade narrowly to widely ovate (sometimes lanceolate on suckers or stressed plants), 3–7 cm; petiole abaxially round, adaxially channeled ..... P. trichocarpa



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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