208 MR. A. W. HILL—REVISION OF 
It is to be noticed that the species with the widest distribution have been collected in 
the neighbourhood of Lake Titicaca, and though they are found principally in the Eastern 
Cordillera of the Andes, specimens are also recorded in some cases from the Western 
Cordillera. One interesting case met with was that of N. lanata, which was found both 
in the peninsula of Copacabana (S.W. side of Lake Titicaca) and also on the hills above 
Huaycho on the N.E. shore, but in no other localities, In the vicinity of Lake Titicaca 
Nototriches are not found in the broad plain or Puna to the north and south of the 
Lake, but only on the hills forming the crests of the cordillera on either side and this 
broad alluvial valley stretching from the Nevado de Vilcanota in about lat. 12° 5' S, to 
about 20° S. lat, including the Lakes Titicaca and Poopo, appears to act as a 
natural barrier separating the species of the Eastern from those of the Western 
Cordillera—so much so that only about five species have been recorded from both sides of 
this region. It is possible that these common species may have spread by way of the 
Vilcanota Mountains which block the head of the valley, or, as appears to have been the 
case with N. lanata, may have spread by way of the narrow straits of Tiquina, where 
the intervening water-way, which is bounded by high hills, may not in former times 
have been an insuperable barrier to distribution. 
In the key to the genus, vide pp. 214-217, the various species have been grouped 
according to the cutting, lobation, and general configuration of the leaves, and an 
attempt has been made to show the relationships of the species to one another. There 
must, however, owing to the imperfection of the records, be considerable gaps in our 
knowledge, so that it is not possible in many cases to draw conclusions as to the affinities 
of certain species. 
In order to show the parts of the Andes from which collections of Nototriche have 
been made, the localities, with their latitudes, for the various species have been set out 
in tabular form. 
Ecuapor (Antisana, Pichincha and Chimborazo, 0° 9’-1° 5’ S. lat.). 
N. pichinchensis, N. phyllanthos, N. Jamesonii, N. Hartwegii, N. Lobbii (?). 
Peru: Dep. Cajamarca (Hualgayoc, 6° 5’ S. lat.). 
N. artemisioides. 
Dep. Ancachs (Yungay, 9°S. lat.). 
N. coccinea. 
(Prov. Cajatambo, 10° 5’ S. lat.). 
N. obtusa, N. pusilla, N. epileuca, N. longissima, N. argentea. 
Dep. Lima (Cerro de Pasco, Oroya, 10? 5/-11? 5’ S. lat.). 
N. Matthewsii, N. nigrescens, N. ulophylla, N. Macleanii, N. aretioides, N. stenopetala, 
N. Cavanillesii (?), 
Dep. Apurimac (Andahuaylas, 13° 5' S. lat.). 
N. dissecta, N. Pearcei. 
Dep. Puno (Prov. Sandia on the borders of Bolivia, 14? S. lat.). 
N. Azorella, N. congesta, N. condensata, N.sulphurea, N. sericea, N. Mandoniana, N. acuminata. 
Dep. Huancavelica (14° S. lat.). 
N. Mandoniana. 
Dep. Cuzco (13° 5' S. lat.). 
N. aristata, N. Castelneana (? Dep. Lima), N. longirostris. 
