GrNus 17. CHICORY FAMILY. 
3. Lactuca ludoviciana ( Nutt.) DC. West- 
ern Lettuce. Fig. 4070. 
Sonchus ludovicianus Nutt. Gen, 2: 125, 1818, 
Lactuca ludoviciana DC, Prodr. 7: 141. +838. 
Biennial, glabrous throughout, leafy up toinflor- 
escence, agers branched, 2°+5° high. Leaves Mh 
oblong to ovate-oblong, acute or acutish, 2-4’ long, 
auriculate-clasping, spinulose-denticulate, sinuate- 
lobed, or pinnatifid with spinulose segments; heads 
3-5” broad, numerous in an open panicle, their 
peduncles bracteolate; involucre cylindric or ovoid- 
cylindric, glabrous, 8’-0” high, its bracts succes- 
sively shorter and broader, the lower ones ovate; 
rays yellow; achenes oval to obovate, flat, about 
the length of their filiform beak; pappus white. 
Plains and banks, Iowa, Minnesota and South Da- 
kota to Kansas and Texas. July—Sept. 
ee . Lactuca hirstta Muhl. Hai Red 
WIZ 4. Lactuca hirsuta Muh airy or ke 
Se): Wood-Lettuce. Fig. 4071. 
qy Ws | Bae 
N \ wie = Lactuca hirsuta Muhl. Cat. 69. 1813. 
{iy  Lactuca sanguinea Bigel. Fl. Bost. Ed. 2, 287. 1824. 
Wi Lactuca elongata var. sanguinea T. & G. Fl. N. A. 2: 
\ Wak 496. 1843. 
Wg 
(( Stem 1°-6° high, naked and paniculately branch- 
ed above, usually hirsute, at least below. Leaves, 
or most of them, sinuate-pinnatifid, pubescent on 
[ both sides, or on the midrib beneath, those of the 
KA stem mostly sessile or auriculate-clasping, 3-7’ 
long, the uppermost sometimes lanceolate and 
entire, the basal petioled; heads numerous, 2’°-3” 
broad; involucre glabrous, 5”-9” high; outer bracts 
shorter ‘than the inner; rays reddish-yellow or 
paler; achenes oblong-oval, flat, about the length 
of the beak; pappus white. 
In dry soil, Quebec to Ontario, Minnesota, Ala- 
bama and Texas. Stem, peduncles and involucre 
often red or purple. July—Sept. 
5. Lactuca Steélei Britton. Steele’s Wild 
Lettuce. Fig. 4072. 
L. Steelei Britton, Man. 899. 1901. 
Stem and branches hirsute. Leaves obovate to oval, 
the larger about 8’ long and 4’ wide, sessile, irregu- 
larly dentate, not lobed, hispid on the veins beneath, 
short-acuminate; involucre about 6” high; rays not 
seen; achenes oval, 3-ribbed, about 14” long, the fili- 
form beak slightly shorter; pappus bright white. 
Near Washington, D. C., and, apparently, in Delaware. 
July-Aug. 
