274 COMPOSITE. (COMPOSITE FAMILY.) 



* Achenia abruptly contracted into ajiliform beak, 



1. L. graminifolia, Michx. Glabrous, or nearly so, stem simple, or 

 paniculate above, 2 - 5 high; leaves liuear, acute, 4'- 12' long, the lower 

 mostly piunatifi-1 in the middle, the earliest obovate or oblong, entire ; flowers 

 mostly blue ; acheiiia elliptical, longer thau the beak. Dry sandy soil in the 

 lower districts. May - August. 



2. L. Canadensis, L. ( WILD LETTUCE.) Glabrous; stem 3 -6 high, 

 paniculate above, leaves pinnatifid from the base, acute or acuminate, 6' -9' 

 long, the upper toothed or entire ; flowers yellow ; acheuia oval-oblong, rather 

 longer than the beak. Margins of fields, and woods. July - Sept. 



3. L. integrif Olia, !>>gel. Stem 3 - 5 high, paniculate above, gla- 

 brous ; leaves oblojug-lanceolate, acuminate, clasping, entire, or the lowest 

 denticulate, rarely lobed, 3' 6' long ; flowers dull yellow ; achenia oval, longer 

 than the beak. With the last in the upper districts. July- August. 



4. L. hirsuta, Mulil. Stem hirsute near the base, 3 - 4 high ; leaves 

 deeply pinnatifld, more or less hirsute, 3' - 4' long ; flowers purplish or dull 

 red; achenia oblong oval, about the length of the beak. Upper districts of 

 North Carolina (Curtis). 



* * Achenia tapering into a short stout beak. MULGEUIUM. 

 +- Pappus white, 



5. L. acuminata, Gray. Smooth; stem panic-led above, leaves ovate 

 or ovate-lanceolate, acuminate, toothed, on winged petioles, the lowest some- 

 times sinuate-lobed ; heads racemed, on spreading peduncles. Margins of 

 fields, etc. Sept. (2) Stem 3 -6 high. Leaves 3' -6' long, often hairy 

 beneath. Flowers blue. 



6. L. Floridana, Ga-rt. Smooth; stem panic-led above; leaves all pin- 

 natifid and toothed, with the terminal lobe larger and 3-augled, or the upper- 

 most lanceolate, sessile or clasping; heads racemose-panicled ; flowers blue. 



-Rich soil, Florida to North Carolina. August -Sept. Stem 3 -6 



high. 



lawny. 



7. L. leucophsea, Gray. Smoothish; stem panicled above; leaves 



numerous, irregularly pinnatifid, with coarsely toothed lobes; the terminal 



lobe 3-angled, or in the upper leaves often linear and entire; racemes panicled. 



- Mountains of North Carolina. Sept. (2) Stem 3 - 12 high Leaves 



6'- 12' long. Flowers pale blue. 



97. SONCHUS, T, 



Heads many-flowered. Scales of the involucre imbricated. Receptacle 

 naked. Achenia compressed, ribbed, not beaked nor narrowed at the apex. 

 Pappus of copious soft white hairs. Annuals. Leaves entire or pinnatifid. 

 Heads somewhat umbelled. Flowers yellow. 



1. S. oleraCGUS, L. Smooth; stem branching; leaves pinnatifid, with 

 spiny-toothed lobes, clasping; the lowest petioled ; achenia transversely rough- 

 ened. Waste places. Introduced. June - August. Stem 1 - 2 high. 





