50 MR. J. BALL ON THE FLOEA 



Specimens of this G-entian, which in appearance much recalls 

 the Q. prostrata of the northern hemisphere, from different loca- 

 lities in the Andes, show so many varieties of structure, that they 

 have received many different specific names. Mr. AVeddell, who 

 had ample opportunities for observing the living plants, united 

 these as varieties of the form first collected by Humboldt and 

 Bonpland. The Casapalta plant, though evidently belonging to 

 the same aggregate species, diff'ers so far from the forms enume- 

 rated by Weddell, that I have found it necessary to name it as a 

 distinct variety- 



G-ENTiAis-A TAGiNALis, Griseb, Chick ! 



Gentiajs-a j^ulticatjlis, Gill. var. ? Upper Rimac valley, 

 above Matucana, iJ. Ward. The single specimen is incomplete, 

 and I do not feel quite confident as to its identity with the 



Chilian species. 



Halenia oektiajs'oides, Wedd. Above Casapalta! 



POLEMOKIACE.^. 



GiLTA LACINIATA, Ruiz and JPav. Chicla ! 



CoLLOMiA GEACins, Boiigl. Chicla ! A dwarf form of the 



species 



Htdkophtllace a^ . 



Phacelia ciecii^ata, Jacg^. Chicla ! As is well known, this 

 species extends throughout the larger part of the American con- 

 tinent, from Oregon to the Straits of Magellan ; throughout that 

 wide area it is singularly constant, exhibiting no marked varieties. 



B0EAai>'EiE. 



Heliotropiijm PARyrrLOEiiM:, Z. Upper valley of the Eimac, 



about 9000 feet ! This species, whose proper home is in the 

 lower zone, ascends from Lima along the valley of the Eimac to 



some height above Matucana. 



Helioteopittm PEETJYiAi^TJM, L. Upper valley of the Eimac, 

 up to about 10,000 feet ! This seems to be a native of the middle 

 zone of the Andes. I did not observe it below the level of 

 feet, and it becomes rare above that of 9000 feet, althou 

 apj)eared to be common between those limits. 



7000 



