COMMON CAN. \hl.\\ WILD PLANT8. 



2. H. SCabrum, Mu-hx. (K<>r<;n H.) III* * ////. Stem 

 stout, 1-3 feet high, roni/h-hairi/, corymbose. I't'dintcli:* or invo- 

 /IH-IT duw/y clothed with dark brif/cx. Achenes not tapering. 

 Sandy woods and thickets. 



3. H. Gronovii, L. (HAIRY H.) Heads small. Stem wand - 

 like, leafy and very hairy below, 'naked above, forming ;i long 

 and narrow panicle. Achenes with a very taper summit. Dry 

 soil, western Ontario. 



4. H, veno'sum, L., (RATTLESNAKE- WEED) with a smooth 

 naked scape (or bearing one leaf), and a loose corymb of very 

 slender peduncles, is found in the Niagara region and south- 

 westward. 



3G. NAB'ALUS, Cass. RATTLESNAKE-ROOT. 



1. N. albus, Hook. (Prenanthes alba, L., in Macoun's Cata- 

 logue. (WHITE LETTUCE.) Heads 8-12-flowered. Pappus deep 

 cinnamon-coloured. Stem 2-4 feet high, smooth and glaucous. 

 corymbose-paniculate. Leaves triangular-halberd-shaped, or 3-5- 

 lobed, the uppermost oblong and undivided. Rich woods. 



2. N. altis'simus, Hook. (Prenanthes altissima, L., in Ma- 

 coun's Catalogue.) (TALL WHITE LETTUCE.) Heads 5-6 -flowered. 

 Paj>pus pale strain-coloured. Stem taller but more slender than 

 in No. 1, with a long leafy panicle at the summit. Rich woods. 



3. N. racemo'sus, Hook. (Prenanthes racemosa, Michx., in 

 Macoun's Catalogue.) Heads about 12-flowered. Involucre and 

 peduncles hairy. Stem wand-like, smooth. Leaves oval or oblong- 

 lanceolate, slightly toothed. Heads crowded in a long and 

 narrow interruptedly spiked panicle. Pappus straw-colour ; 

 flowers flesh -colour. Shore of Lake Huron and south-westward. 



37. TARAX'ACUM, Haller. DANDELION. 



T. Dens-leo'nis, Desf. (COMMON DANDELION.) Outer invo- 

 lucre reflexed. Leaves runcinate. Fields everywhere. 



38. LACTU'CA, Tourn. LETTUCE. 



1. L. Canadensis, L. (WiLi> LETTUCE.) Heads numerous, 

 in a long and narrow naked panicle. Stem stout, smooth, hollow, 

 4-9 feet high. Leaves mostly runcinate, partly rlnspini:. jwlc 

 beneath ; the upper entire. Achenes longer than their b.-.-tks. 

 Borders of fields and thickets. 



