tained from several species of Anhalonium, with which 
genus Lophophora Williamsii was formerly identified. 
In Mexico, the term peyote or peyotl refers to plants 
other than Lophophora Williamsi. This has been the 
source of much confusion. 
A representative list of Mexican ‘‘peyotes’’, all of 
which are either narcotic or medicinal, would include: 
among the Cactaceae: Ariocarpus fissuratus (K.ngelm. ) 
K.Schum., Astrophytum myriostigma Lem. (11), and 
Astrophytum asterias (Zuce.) Lem., Pelecyphora aselli- 
forms Khrenb., and Strombocactus disciformis DC. (2); 
among the Crassulaceae: Cotyledon caespitosa Haw. (4); 
among the Compositae: Senecio calophyllus Hemsl., S. 
Hartwegu Benth., S.ovatifolius Sch. Bip. (4), and SS. 
Petasitis DC. (11), as well as several species of Cacalia, 
especially the supposed aphrodisiac and _ sterility cure 
obtained from Cacalia cordifolia HBK. (13); among the 
Leguminosae: Rhynchosia longeracemosa Mart. & Gal. 
(11); and among the Solanaceae: Datura meteloides DC. 
ex Dunal (71). 
Under the diminutive term peyotillo are included the 
cactuses Dolichothele longimamma Britton & Rose and 
Solisia pectinata Britton & Rose (4). 
Peyote (Lophophora Williamsii) is often confused 
with the intoxicating Mexican seed ololiuqui, the botan- 
ical identification of which still seems to be uncertain. 
Specimens received from Mexico under this name have 
been identified at the Gray Herbarium as Rivea corymbosa 
(L.) Hall.f. A narcotic drink prepared from these seeds 
is called pile; it is without doubt this name that has 
caused confusion (10). 
The application of the name peyote to so many widely 
different plants cannot be satisfactorily explained by as- 
suming successive borrowings. Turning to etymology, it 
is found that Safford (173) holds to the old theory that 
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