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

Key to Pelargonium

View taxon page for Pelargonium

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

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

1. Leaf glabrous ..... [P. peltatum]

1' Leaf not peltate, glabrous or not

2. Leaf  ± as long as wide

3. Leaf membranoushairs 0 or sparse; petals pink-purple ..... [P. zonale]

3' Leaf ± succulent, hairs dense; petals red to white

4. Leaf blade 15–20 cm wide; petals red to white ..... P. ×hortorum

4' Leaf blade generally 4–8 cm wide; petals red ..... P. inquinans

2' Leaf blade longer than wide or wider than long

5. Flower < 10 mm wide; stem slender, < 3 mm diam ..... P. grossularioides

5' Flower 15–40 mm wide; stem stout, > 3 mm diam

6. Inflorescence ± lax; flower 30–40 mm wide;  blade abaxially hairier, of different color than adaxially ..... P. panduriforme

6' Inflorescence dense; flower 15–18 mm wide; leaf blade abaxially, adaxially equally hairy, of same color

7. Plant  to sprawling; margins of lower leaves irregularly curled; inflorescence 8–20-flowered ..... [P. capitatum]

7' Plant ; margins of lower leaves not curled; inflorescence 3–12-flowered ..... [P. vitifolium]


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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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