Contains 5 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 canadensis | CANADA LETTUCE | Native FACU (NWPL) | ||
| Lactuca floridana | WOODLAND LETTUCE | Native FACU (NWPL) | ||
| Lactuca graminifolia | GRASSLEAF LETTUCE | Native UPL (NWPL) | ||
| Lactuca serriola | PRICKLY LETTUCE | Not Native FAC (NWPL) | ||
| Lactuca virosa | BITTER LETTUCE | Not Native |
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 |
|---|---|---|---|
| Brachyramphus | Brachyramphus de Candolle, Prodr. 7: 176. 1838. | TYPE: Brachyramphus intybaceus (Jacquin) de Candolle (Lactuca intybacea Jacquin) Lectotypified by Britton & P. Wilson, Bot. Porto Rico 6: 277. 1925. | |
| Cyanoseris | Cyanoseris (W. D. J. Koch) Schur, Verh. Mitth. Siebenbuerg Vereins Naturwiss. Hermannstadt 4(suppl.): 43. 1853. | BASIONYM: Lactuca Linnaeus, sect. Cyanoseris W. D. J. Koch, Syn. Fl. Germ. Helv. 432. 1837. | TYPE: Cyanoseris perennis (Linnaeus) Schur (Lactuca perennis Linnaeus) |
| Lactucopsis | Lactucopsis Schultz Bipontinus ex Visiani, Mem. Reale Ist. Veneto 15(1): 5. 1870. | TYPE: Non designatus. | |
| Mikania | Mikania F. W. Schmidt, Samml. Phys. Oekon Aufsaetze 1: 27. 1795, nom. rej. vs. Mikania Willdenow 1803. | TYPE: Mikania floridana (Linnaeus) F. W. Schmidt (Sonchus floridanus Linnaeus) | |
| Phaenixopus | Phaenixopus Cassini, in Cuvier, Dict. Sci. Nat. 39: 391. 1826. | TYPE: Phaenixopus decurrens Cassini, nom. illegit. (Prenanthes viminea Linnaeus) Lectotypified by Pfeiffer, Nomencl. Bot. 2: 659. 1874. = Scariola F. W. Schmidt 1795, by lectotypification. | |
| Scariola | Scariola F. W. Schmidt, Samml. Phys. Oekon. Aufsaetze 1: 270. 1795. | TYPE: Scariola viminea (Linnaeus) F. W. Schmidt (Prenanthes viminea Linnaeus) | |
| Wiestia | Wiestia Schultz Bipontinus, Jahrb. Pract. Pharm. Verwandte Fächer 4: 154. 1841. | TYPE: Non designatus. |