GENUS I7. CHICORY FAMILY. 32! 
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g. Lactuca villésa Jacq. MHairy-veined 
Blue Lettuce. Fig. 4076. 
L. villosa Jacq. Hort. Schoen. 3: 62. pl. 367. 1798. 
Sonchus acuminatus Willd. Sp. Pl. 3: 1521. 1804. 
Mulgedium acuminatum DC. Prodr. 7: 249. 1838. 
L. acuminata A. Gray, Proc. Am. Acad. 19: 73. 1883. 
Annual or biennial; stem glabrous, leafy up to 
the paniculate inflorescence, 2°-6° high. “Leaves 
oblong, ovate or lanceolate, acuminate, acutely den- 
tate or the teeth mucronate-tipped, glabrous above, 
pubescent with short stiff hairs on the veins be- 
neath, sessile and slightly clasping at the base, or <€ 
petioled, 4’-6’ long, 1’-23’ wide, the lowest some- & 
times lobed at the base; heads numerous, 3-5” ~~ 
broad; peduncles usually minutely scaly; rays 
blue; involucre about 5” high, its outer bracts 
much shorter than the inner, some or all of them 
obtuse; achenes thick, oblong, little flattened, nar- 
rowed above; pappus white. . 
In thickets, New York to Illinois, Nebraska, south 
La peor Georgia and Kentucky. July-Sept. False 
ettuce. 
AN 10. Lactuca floridana (L.) Gaertn. False or 
SS Florida Lettuce. Fig. 4077. 
Sonchus floridanus L. Sp. Pl. 794. 1753. 
Lactuca floridana Gaertn. Fruct. & Sem. 2: 362. 1791. 
Mulgedium floridanum DC. Prodr. 7: 349. 1791. 
Annual or biennial; stem glabrous, rather stout, 
leafy up to the large, paniculate inflorescence, 3°-7° 
high. Leaves deeply lyrate-pinnatifid, or sometimes 
cordate-ovate, sessile or petioled, 4’-12’ long, glabrous 
above, pubescent on the veins beneath, the terminal 
segment usually broad, triangular, acute or acumi- 
nate, the lateral ones lanceolate to oval, acute, all 
usually dentate, or the leaves irregularly lobed; 
heads numerous, 3-5” broad; peduncles commonly 
scaly; rays blue; involucre about 6” high, its outer 
bracts much smaller than the inner; achenes thick, 
somewhat compressed, narrowed above into a short 
beak; pappus white. 
1 In moist, open places, southern New York and Penn- 
sylvania to Illinois, Kansas, Florida and Texas. Porto 
2 Rico. July—Sept. 7. Wy 
11. Lactuca spicata (Lam.) Hitchce. WP MVE 
Tall Blue Lettuce. Fig. 4078. YW 
Sonchus spicatus Lam. Encycl. 3: 401. 1789. 
Mulgedium leucophaeum DC. Prodr.7: 250. 1838. 
Lactuca leucophaea var. integrifolia A. Gray, 
Syn. Fl. 1: Part 2, 444. 1884. 
Lactuca spicata integrifolia Britton, Mem. Torr. 
Club 5: 350. 1894. : 
Te eee Hitche. ; Britt. & Brown, Ill. Fl. 3: 276. 
1898. 
Annual or biennial; stem usually stout, gla- 
brous, 3°-12° high, leafy up to the large, 
rather dense panicle. Leaves deeply pinnatifid 
or lobed to entire, sharply dentate with mu- 
cronate-pointed teeth, sessile, or the lower 
narrowed into margined petioles, glabrous on 
both sides, or pubescent on the veins beneath, 
5-12 long, 2’-6’ wide; heads very numerous, 
about 2” broad; peduncles minutely scaly; 
rays blue to white; achenes oblong, com- 
pressed, narrowed above into a short neck; 
pappus brown. 
In moist soil, Newfoundland to Manitoba, 
North Carolina,: Tennessee, Iowa, South Dakota 
and Colorado. Ascends to 2000 ft. in North 
Carolina. Races differ in leaf-form and in color 
of the flowers. Milk-weed. July—Oct. : 
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