WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 753 
14. Cirsium perennans (Greene) Woot. & Standl. 
Carduus perennans Greene, Bull. Torrey Club 25: 125. 1898. 
Type Locauity: White Mountains, New Mexico. Type collected by Wooton (no. 
396). 
RANGE: Mountains of southern New Mexico. 
New Mexico: Eagle Peak; White and Sacramento mountains; Organ Mountains. 
Transition Zone. 
15. Cirsium undulatum (Nutt.) Spreng. Syst. Veg. 3: 374. 1826. 
Carduus undulatus Nutt. Gen. Pl. 2: 130. 1818. 
Cnicus undulatus A. Gray, Proc. Amer. Acad. 10: 42. 1874, 
Type Locauity: ‘On the calcareous islands of Lake Huron, and on the plains of 
Upper Louisiana.”’ 
Rance: British America to Utah and Texas. 
New Mexico: Tunitcha Mountains; Chama; Tierra Amarilla; Pecos: Winsors Ranch; 
Rio Mora; Santa Fe; Anton Chico; White Mountains. Plains and hills, in the Upper 
Sonoran and Transition zones. 
16. Cirsium megacephalum (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 Locauiry: Texas. 
Rance: 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 Upper 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 Locauiry: Mountain sides around Santa Fe, New Mexico. Type collected 
by Fendler (no. 486). 
RanaE: 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. Burpock. 
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 tips; receptacle 
bristly; achenes oblong, compressed, transversely rugose; pappus of numerous short 
bristles. 
1. Arctium minus Schkuhr, Bot. Handb. 3: 49. 1803. 
_ Type LocaLiry: 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. 
52576°—15——48 
