48 
Lactuca floridana (L.) Gaertner, Florida lettuce, p. 1642 
var. floridana 
f. floridana 
var. villosa (Jacq.) Crong. [M: L. floridana] (Cronquist, 1948) 
L. hirsuta Muhlenb. ex Nutt., hairy lettuce, p- 1640 
var. hirsuta 
var. sanguinea (Bigelow) Fern. 
L. ludoviciana (Nutt.) Riddell, western wild lettuce, p. 1642 
- ludoviciana 
+L. saligna L., willow-leaved lettuce, p. 1639 
var. runcinata Gren. & Godron [S: L. saligna f. saligna; M: L. 
saligna] (Ferakova, 1977) (note that S: called the 
Plants with pinnatifid leaves is var. runcinata 
var. saligna [S: L. saligna f. ruppiana (Wallr.) G. Beck] 
(Ferakova, 1977) 
*@L. sativa L., lettuce (Mihlenbach, 1983 
+L. serriola L., Prickly lettuce [S: L. scariola L.] (Prince and 
Carter, 1977), Pp. 1638 
f. integrifolia (Gray) Prince & R. Carter [S: L. scariola f. 
integrifolia (Bogenh.) G. Beck: M: L. serriola] (Prince 
and Carter, 1977) 
Triola 
f. se 
L. tatarica LC. Meyer, blue lettuce, p. 1642 
ssp. pulchella (Pursh) Stebb. [S: L. pulchella (Pursh) DC; G: 
L. oblongifolia Nutt.] (Stebbins, 1939; Ferakova, 1977) 
LAPSANA 
*Lapsana communis te nipplewort, P. 1628 
SSp. Communis 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
