position of the concept. I decided that, if indeed one were justified in 
separating this concept from Ipomoea, it must be accommodated in 
Rivea. The outstanding Argentinian specialist on the Convolvulaceae, 
the late Dr. Carlos O’Donell, who was spending a year at Harvard 
University at that time, worked with me closely in this study and was 
in complete agreement. I have studied this problem again in connec- 
tion with Wasson’s recent work and see no reason to change my 
opinion. Furthermore, it is clear that such an authority as the late 
Professor E. D. Merrill referred this concept to Rivea, placing Tur- 
bina in synonymy under Rivea and 7’. corymbosa in synonymy under 
R. corymbosa. 
In view of the fact that such authorities as O’Donell and Merrill 
elected to use Rivea corymbosa; that Wilson acknowledges that ‘‘the 
entire family is in need of intensive study and . . . all characters must 
be thoroughly re-evaluated’’; that Roberty’s article is hardly conser- 
vative and actually adds little to our basic knowledge of the family ; 
and that the ethnobotanical and chemical literature has accepted Rivea 
corymbosa—in view of all these circumstances perhaps we might well 
continue to use the best known name until a really comprehensive 
study by a recognized specialist indicates that it is wrong. 
Rivea corymbosa (L.) Hallier fil. in Engler Bot. Jahrb. 8 (1893) 
Eye 
Convolvulus corymbosus Linnaeus Syst. Nat. Ed. 10, 2 (1759) 928. 
Ipomoea corymbosa (L.) Roth Nov. 11. Sp. Ind. Orient (1821) 109. 
Turbina corymbosa (L.) Rafinesque Fl. Tellur. 4 (1838) 81. 
—R. E. Scuuttrs 
The least known in the outside world of our quartet 
of major Mexican divinatory agents is ololiuhqui;t yet it 
is perhaps the best known and most widely used among 
the Indians of that country. In the race for world atten- 
tion ololiuhqui has been aslow starter. Beyond the con- 
fines of the Sierra Madre few except specialists have heard 
of it, and the bibliography on it is short. But its proper- 
ties are as sensational as those of teonanacatl and peyotl. 
Its identity was settled in 1941. The enigma of its chem- 
istry was resolved in 1960, when on August 18 of that 
year Dr. Albert Hofmann read his paper in Australia 
{ Although the spelling olo/iuqui has gained wide acceptance and is 
now the commonest orthography, linguistic evidence indicates that 
this Nahuatl word is correctly written ololiuhqui. 
[ 174 ] 
