Project
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Keys to Nature Project |
| Key to genera of the Onagraceae |
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Title: Key to genera of the Onagraceae |
| Version: 54 |
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| Author(s): Matt Pfister, Kelly Pugh, Paul Rothrock |
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| Email: plrothroc@tayloru.edu |
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| Description: Key to the genera of Onagraceae; limited to NE Illinois and NW Indiana. |
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| Key Structure: 1. Flower parts in twos; fruits with hooked bristles - Circaea 1. Flower parts in four or fives; fruits lacking hooked bristles - 2 2. Fruits indehiscent; flowers grouped on one side of inflorescence - 3 2. Fruits dehiscent; flowers evenly distributed on inflorescence - 4 3. Ovary eight-ribbed; hypanthium longer than the ovary - Stenosiphon 3. Ovary three- to four-ribbed; hypanthium as long as ovary - Gaura 4. Sepals persistent on fruit - Ludwigia 4. Sepals deciduous - 5 5. Flowers usually yellow; capsule fruits prismatic to winged; seeds without tuft of hairs at the end - 6 5. Flowers white to pink; capsules linear to elongate; seeds with tuft of hair at end - Epilobium 6. Stigma with 4 linear lobes - Oenothera 6. Stigma slightly 4 lobed, peltate - Calylophus serrulatus |
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