47 



It seems to me that neither this nor the next present sufficient 



characters to warrant their being separated from L. Canadensis 



as anything more than varieties. 

 1311. L. HIRSUTA, Muhl. 



L. Canadensis var. sanguinea, T. k, G. 



Railway banks and rocky wooJs, not uncommon. Leaves all 



runcinate-pinnatifid, hirsute on the mid-ribs beneath. Flowers 



purplish-yellow. Aug — 3. 



1314. L. LEUCOPH^A, Gray. 

 Midgedium leucojyliceum, D. C. 



Low, rich woods. A tall plant much like L. Canadensis, but 

 with brownish pappus. Aug. — 2. 



1315. L. sativa, L. (Garden Lettuce.) 



Occasionally found on waste heaps ; but never permanently 

 established. 

 PRENaNTHES, L. Eattlesnake-root. 



1316. P. ALBA. L. (White Lettuce.) 

 Nahalus alius, Hook. 



Pocky woods. An interesting plant with glaucous foliage and 

 purplish red stems, peduncles, and involucres. Flowers white 

 and pappus deep brown. Aug. — 2. (B.) 



1318. P. ALTISSIMA, L. 



Nahalus altissiinus, Hook. 



Woods. A tall, slender plant with yellow flowers and dusky 

 pappus. Aug. — 2. (B.) 

 SONCHUS, L. (Sow Thistle.) 



1321. S. oleraceus, L. (Common Sow-thistle.) 



Cultivated ground and waste places. Annual. Aug. — 1. Leaves 

 clasping by a heart-shaped base, the auricles acute. 



1322. S. asper, Vill. (Prickly Sow-thistle.) 



With the last, but commoner. Leaves more prickly, the auricles 

 of the base rounded. 



1323. S. arvensis,Jj. (Perrennial Sow-thistle.) 



At the base of Parliament Hill is a large and rapidly increasing 

 patch of this plant, which is now becoming a troublesome 

 weed in Canada. It has also been noticed at Chelsea and at 

 Billings Bridge at the edges of fields. Aug. — 1. 

 TRAGOPOGON, L. Goat's-beard. 



1^26. T. pratensis, 1j. (Yellow Goat's-beard.) 



Along the railw-ay near the St. Louis Dam. A few plants have 

 been found at the above locality for the last 12 years. Flowers, 

 large, vellow. 

 1227. T.p'orrifolius,'L. (Salsify.) 

 An escape from cultivation. In a hay-field at Billings Bridge and 

 occasional on waste heaps. Flowers purple. 



