726 REPORT OF NEW JERSEY STATE MUSEUM. 



Common throughout the State as a weed in cultivated ground. 

 It is obviously not native in the Pine Barrens, but its original 

 distribution in the other districts cannot be ascertained. 



PL — Early August to mid-September. 



XANTHIUM L. 



Xanthium canadense Mill. Cocklebur. 



Xanthium Canadense Miller, Gard. Diet. Ed. VIII. 1768 [Penna. and Mary- 

 land]. 



Occasional in open moist ground of the Middle district. 



Fr. — Mid-September into October. 



Middle District.— Mt. Holly. 



Xanthium commune Biitton. Clotbur. 



Xanthium commune Britton, Man. 912. 1901 [Westport, N. Y.]. 



Frequent in open moist ground of the Middle district. 

 Fr. — Mid-September into October. 



Middle District. — New Egypt, Camden. 



Xanthium echinatum Murr. Beach Clotbur. 



Xanthium echinatum Murray, Comm. Goett. VI. 32, pi. 4. 1785 [New York]. 



Keller and Brown 314. 

 Xanthium strumarium var. echinatum Knieskern.— Willis 33. 

 Xanthium canadense var. echinatum, Britton 143. 



Sand dunes of the sea coast and lower Delaware Bay, common. 

 Fr. — Mid-September into October. 



Maritime.— 'Forked River, Spray Beach (L), Cedar Bonnet (L), Ocean 

 City, Stone Harbor, Five-Mile Beach, Cape May, Cape May Ft. (S). 



Family COMPOSITE. 



Key to the Species. 



a. Flowers all tubular, no flat ray flowers present. 

 b. Flowers white, greenish or yellow. 



c. Shrub with copious white silky pappus in fruit. Baccharis, p. 764 

 cc. Herbs. 



d. Flowers white. 



e. Wooly, flowers in small, dense heads, with abundant white 

 pappus. 

 f. Dioecious. 



g. Stem 3-9 dm. high, stem leafy. Anaphalis, p. 767 



