APRIL 10, 1921 safford: synopsis of datura 181 



A handsome plant bearing large heavily scented flowers with a decagonal 

 corolla limb, white, usually suffused with lavender or pale violet. Stems and 

 foliage glaucescent. Fruit nodding, indehiscent (Fig. 1 D). 



This species is held sacred by several Indian tribes of the southwestern 

 United States. It is without doubt the Ololiuhqui of the Aztecs, who used 

 it ceremonially and medicinally very much after the same manner as it is still 

 used by our own Indians in New Mexico, Arizona, and California. An ac- 

 count of the Zuni myth associated with it and its use by the Luisefio Indians 

 of southern California in initiating their youths to manhood will appear 

 in the paper by the writer to be published in the forthcoming Annual Report 

 of the Smithsonian Institution. 



8. Datura discolor Bernh. Trommed. N. Journ. Pharm. 26: 149. 1838. 

 Datura thomasii Torr. Pacif. R. R. Rep. 5: 362. 1856. 



Type Locality: "Habitat in India occidentali." 



Range: West Indies, Mexico, and the southwestern United States. 



A plant somewhat resembling D. meteloides, but with the corolla 10-toothed 

 and trumpet-shaped instead of funnel-shaped, and usually stained with purple 

 at the throat. It is easily distinguished from the former, with which it is not 

 infrequently associated, by its smaller flower, black seeds, and the long stout 

 spines with which its smaller nodding fruit is armed. 



9. Datura pruinosa Greenm. Proc. Amer. Acad. 33: 486. 1898. 

 Type Locality: Cuicatlan, Oaxaca, Mexico. 



Range: State of Oaxaca, altitude 550 to 1550 meters. 



This plant may readily be distinguished from its allies "by the small flowers 

 and the fine pruinose pubescence of the young leaves and the tips of the young 

 branches." 



Section III. Ceratocaulis vSpach. 



Fruit (Fig. i, E) a pendent or abruptly deflexed smooth berry, subtended 

 by the enlarged persistent base of the calyx; flowers erect, trumpet-shaped, 

 the calyx spathe-like and split down one side, the corolla tube long and narrow, 

 the limb lo-toothed; stamens exserted, subequal. This section was segre- 

 gated from the rest of the Daturas by Rafinesque, under the name Apemon. 



key to the species 



A single species. — Leaves pinnately lobed, farinose beneath; corollas large, 

 white stained with blue. An aquatic plant of Mexico and Central 

 America. 10. D. ceraiocaiila. 



10. Datura ceratocaula Ort. Dec. 11. 1798. Fig. 1, E. 



Datura macrocaulis Roth, Neue Beitr. 159. 1802. 



Apemon crassicaide Raf. Fl. Tell. 2: 11. 1836. 



Datura sinuata Sesse & Moc. PI. Nov. Hisp. ed. 2. 24. 1893. 

 Type Locality: "Prope urbem Mexici et in insula Cuba. 

 R.\nge: States of Mexico, Ouerctaro, and Oaxaca, usually in shallow water. 



A fleshy plant with thick dichotomous stem and horn-like branches, the 

 narcotic "Torna-loco" ("Maddening-plant") of the Mexican marshes. It 



