RAriWEED FAMILY. 757 



Iva friitescens L. Sp. PI. 2 : 981*. 1753. Siiuuhisy Maksii Kldkk. 



Ell. Sk. 2 : 471. Gray, Man. ed. 6, 272. ('li:.i>. El. 222. Gray. Syn. El. N. A. 1, pt. 

 2:247. Coulter. Coiitr. Nat. Herb. 2 : 20S. 



Caroliuiau to Lonisiaiiian area. Coast of Massacliiisctts to Elorida, wchst to Texas. 



Alabama: Coast plaiu. Snlunaritiiiie and Littoral region. Mnddy l)rackish 

 shores and marshes near the sea lieacli. M()l)ile County, estuary of the Mobile 

 Kiver; West Fowl River; Dauphin Island. Hald win Conn tj% Point Clear. Shrub 

 5 to G feet high. 



Type locality : " Hab. in Virginia, l^eru.'' 



Herb, Geol. Surv. Herb. Mohr. 



AMBROSIA L. Sp. P1.2:{»87. 1753. 



Twenty-five species, Mediterranean region of the (^Id Worhl, Sandwich Islands, 

 temperate warmer America. North America, 8. Atlantic, 4. 



Ambrosia trifida L. Sp. PI. 2 : 987. 1753. Tall Racjwekd. 



Ell. 8k. 2 : 476. Gray, Man. ed. 6, 273. Chap. Fl. 223. Gray, Syn. Fl. N. A. 1, pt. 2 : 

 249. Coulter, Contr. Nat. Herb. 2 : 209. 



Cuba, Mexico. 



Alleghenian to Louisianian area. Quebec and Ontario to Manitoba; New England 

 west to Minnesota, south to the Gnlf; from Florida west to Texas, Arkansas, and 

 Colorado. 



Alabama: Throughout the State. In rich damp soil, alluvial banks, borders of 

 low fields. Abundant in the rich valley lands and the black lands of the prairie 

 region. July to Sei)temlier. Animal. 



Type locality : " Hab. in Virginia, Canada.'' 



Herb. Geol. Surv. Herb. Mohr. 



Ambrosia artemisiaefolia L. Sp. PI. 2 : 988. 1753. Hogwerd. Bitterweeu. 



Ell. Sk. 2 : 477. Gray, Man. ed. 6, 273. Chap. Fl. 223. Gray, Syn. Fl. N. A. 1, pt. 2 : 

 249. Coulter, Contr. Nat. Herb. 2 : 210. 



Cuba, Mexico, Bhazif,. 



Alleghenian to Louisianian area. Nova Scotia to Saskatchewan and the Pacific 

 coast. All over the Eastern Fnited States, west to Arkansas and Texas. 



Alabama: Over the State. Dry cultivated ground; the commonest of weeds. 

 July to September. Annual. 



Type locality : " Hab. in Virginia, Pensylvania." 



Herb. Geol. Surv. Herb. Mohr. 



Ambrosia psilostachya DC. Prodr. 5 : 526. 1836. Prairie Ragweed. 



Gray, Iffan. ed. 6, 273. Gray, Syn. Fl. N. A. 1, pt. 2 : 250. Coulter, Contr. Nat. Herb. 

 2:210. 



Alleghenian to Carolinian area. Illinois west to Saskatchewan. 



Alabama: Adveutive from Texas with wool. Autauga County, Prattville. 

 Perennial. 



Type locality: " In Mexico inter San-Fernando et Matamoros legit cl. Berlandier." 



Herb. (Jeoi. Surv. Herl). Mohr. 



XANTHIUM L. Sp.P1.2:987. 175.3. 



About5 species, temperate and warmer regions olthc Old and New World. North 

 America, endemic, 1; native, 3. 



Xanthiiim strumarium L. Sp. PI. 2 : 987. 1753. Cocklebur. Burweed. 



Ell. Sk. 2 : 47^, in part. Gray, Man. ed. 6, 274. Chap. Fl. 224 ; ed. 3, 245. Gray, Syn. 

 Fl. N. A. 1, i)t. 2 : 521. Coulter, Contr. Nat. Herb. 2 : 210. 



Europe, Asia. 



Alleghenian to Louisianian area. Naturalized throughout the eastern United 

 States to Nebraska and Texas. 



Alabama: Over tiie State, about dwellings and in cultivated and wastes ])laces. 

 Tuscaloosa and .Mobile counties. Apparently not abundant. 



Type locality : "Hab. in Europa, Canada, Virginia, .lamaica, Zeylona, .Japonia." 



Xanthiurn canadense Mill. Diet. ed. 8, no. 2. 17t)8. Cocklebur. 



Xaiithium eckiuatitm Murr. Connn. (loett. 6 : 32, /. 4. 1783. 



Ell. Sk. 2 : 479. ( ?) Gray, Man. ed. 6, 271. Chap. Fl. 224. Gray, Syn. Fl. N. A. 1, ])t. 

 2:252. Coulter, Contr. Nat. Herb. 2:211. 



