Contains 7 accepted taxa overall.
Characteristics
Classification
Citation
LACTUCA Linnaeus, Sp. Pl. 795. 1753.
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TYPE: Lactuca sativa Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 3: 317. 1913.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Lactuca biennis | Tall Blue Lettuce | |||
| Lactuca canadensis | American Wild Lettuce | |||
| Lactuca floridana | Woodland Lettuce | |||
| Lactuca graminifolia var. graminifolia | Coastal Plain Lettuce | |||
| Lactuca hirsuta | Downy Lettuce | |||
| Lactuca saligna | Willowleaf Lettuce | |||
| Lactuca serriola | Prickly Lettuce |
Identification Key
1. Corolla blue, lavender
2
1. Corolla yellow
3
2. Leaves lanceolate to ovate, lobed, toothed; achene beakless or the beak stout and less than 1/3 as long as the body
2. Leaves linear, lobed, entire; achene beak filiform, more than 1/2 as long as the body
3. Cypselae with 1(3) nerves
3. Cypselae with (3)5-9 nerves
4
4. Cypselae purplish to blackish, elliptic
4. Cypselae pale brown to grayish to whitish, obovate to oblanceolate
5
5. Cauline leaf blades ovate to orbiculate, midribs usually smooth; phyllaries usually erect in fruit
5. Cauline leaf blades oblong, narrowly obovate, to lanceolate, midribs usually prickly setose; phyllaries usually reflexed in fruit
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||