involved (Schultes in Bot. Mus. Leafl. Harvard Univ. 
14 (1949) 45, t. 10). 
We have recently attempted to study the numerous 
specimens of lulo now available. Although many more 
field observations and much more material from a wider 
area are greatly to be desired, we believe that our studies 
have led to at least a preliminary clarification of the prob- 
lem. It is merely as a preliminary contribution that we 
offer the following notes. 
Both of us have seen the lulo under cultivation in the 
field. Our experience and field notes are in complete 
agreement with the results of our study of the available 
herbarium material. 
We wish to thank the Directors of the following botan- 
ical institutions for their kindness in allowing us to con- 
sult the material entrusted to their care: Gray Herbar- 
ium, Arnold Arboretum, Economic Herbarium of Oakes 
Ames (Harvard University); Chicago Natural History 
Museum; National Arboretum Herbarium (Beltsville, 
Maryland); U.S. National Herbarium (Washington, 
D.C.); Royal Botanic Gardens (Kew); British Museum 
(Natural History) (London); Musée d’ Histoire Natu- 
relle (Paris); Jardin Botanique de |’Etat (Brussels) ; 
Jardin Botanique (Geneva); and the Jardin Botanico 
(Madrid). 
The two concepts which are involved may be distin- 
guished by the character in this key. 
I. Planta perfecte inermis. Peruvia, Kcuadore, Colombia meridi- 
onali. 
Solanum quitoense 
II. Planta ramulis, petiolis, nervisque variabiliter armata, Colombia 
centrali et septentrionali. 
Solanum quitoense var. septentrionale 
[ 98 ] 
