WOOTON AND STANDLEY FLORA OF NEW MEXICO. 753 



14. Cirsium perennans (Greene) Woot. & Standi. 

 Carduus perennans Greene, Bull. Torrey Club 25: 125. 1898. 



Type locality: White Mountains, New Mexico. Type collected by Wooton (no. 

 326). 



Range: Mountains of southern New Mexico. 



New Mexico: Eagle Peak; White and Sacramento mountains; Organ Mountains. 

 Transition Zone. 



15. Cirsium imdulatum (Nutt.) Spreng. Syst. Veg. 3: 374. 1826. 

 Carduus undulatus Nutt. Gen. PI. 2: 130. 1818. 



Cnicus undulatus A. Gray, Proc. Amer. Acad. 10: 42. 1874. 



Type locality: "On the calcareous islands of Lake Huron, and on the plains of 

 Upper Louisiana." 



Range: British America to Utah and Texas. 



New Mexico : Tunitcha Mountains; Chama; Tierra Amarilla; Pecos ; Winsors Ranch ; 

 Rio Mora; Santa Fe; Anton Chico; AVhite Mountains. Plains and hills, in the Upper 

 Sonoran and Transition zones. 



16. Cirsium m.egacephalum (A. Gray) Cockerell, Univ. Mo. Stud. Sci. 2^: 254. 

 1911. 



Cnicus undulatus megacephalus A. Gray, Proc. Amer. Acad. 10: 42. 1874. 



Carduus megacephalus Smyth, Trans. Kans. Acad. 16: 160. 1899. 



Type locality: Texas. 



Range: Idaho and South Dakota to Arizona and Texas. 



New Mexico: Mimbres; Mangas Springs; Mogollon Mountains; Santa Rita; San 

 Luis Mountains; Dog Spring. Dry hills and plains, in the Lower and Tapper Sonoran 

 zones. 



17. Cirsium ochrocentrum. A. Gray, Mem. Amer. Acad. n. ser. 4: 110. 1849. 

 Cnicus ochrocentrus A. Gray, Proc. Amer. Acad. 19: 57. 1883. 



Carduus ochrocentrus Greene, Proc. Acad. Phila. 1892: 363. 1893. 



Type locality: Mountain sides around Santa Fe, New Mexico. Type collected 

 by Fendler (no. 4SG). 



Range: Nebraska and Colorado to Arizona and New Mexico. 



New Mexico: Pecos; Sierra Grande; San Juan; Nara Visa; Kennedy; Chiz; Ramah; 

 Socorro; Mangas Springs; Organ Mountains; Gray; Tularosa; Roswell. Plains and 

 low hills, chiefly in the Upper Sonoran Zone. 



133. ARCTIUM L. Burdock. 



Coarse biennial herb with large, cordate-ovate, petiolate, more or less tomentose 

 basal leaves and rather small, clustered heads of purple flowers; involucre globose, 

 the much imbricated, many-ranked bracts with filiform hooked tijas; receptacle 

 bristly; achenes oblong, compressed, transversely rugose; pappus of numerous short 

 bristles. 



1. Arctium minus Schkuhr, Bot. Handb. 3: 49. 1803. 



Type locality: Germany. 



New Mexico: Fruitland (Standley). 



A common weed in most parts of the eastern United States, introduced from Europe. 

 So far it has been noted in only this one locality in New Mexico, where it is abundant 

 in cultivated fields and along ditch banks. 

 52570°— 15 48 



