OF THE PEBUVIA]^ ANDES. 47 



Senecio humillimus, Sch. Bip. A^ar. involucri foliolis latio- 

 ribus. Above Casapalta ! 



Senecio casapaltensis, n. sp. Above Casapalta! 



Pygmajxis, subacaulis, rhizomate crasso verticab", fibres validos 

 laterales eniittente ; f oliis omnibus radicalibus rosulatis, ambitu 

 obverse lanceolatis, profunda lyrato-pinnatifidis, lobis angulato- 

 subrotundis, supremis conflucntibus ; capitulo solitario sub- 

 exscapo, diacoideoj majusculoj multifloro, diametro subpollicari; 

 involucri foliolis linearibus adpi^essis, apice acutis. 



Senecio modestus, Wedd. Chi, And. i. p. 105, tab. 18 B. 

 Above Casapalta ! I do not think that aS'. Mandonianus, Wedd., 

 can be maintained as a species distinct from this. 



Amid the multitude of stemless plants belonging to Senecio or 

 nearly allied genera that abound in the U2)per region, it is very 

 difficult at once to distinguish the different species, though on 

 examination many of them display well-marked characters. 



Webneria strigosissima, a. Gray, JProc, Amer, Acad, v. 

 p. 140,= W, setosa, Wedd, MSS, Above Casapalta! 



Gentaurea melitensis, Z. Upper valley of the Eimac, 

 ascending to about 9000 feet I This plant may probably have 

 been introduced from Spain at an early period in the history of 

 her American colonies. It is now widely diffused through most 

 parts of the former Spanish territory where the climate is not too 

 moist and hot to permit it, 



Chlquiragua spinosa, Don^ var. ineraiis. About Casapalta ! 

 Forming erect bushes about 2 feet in height. The lower limit 

 observed by me was about 13,700 feet above the sea. 



MuTisiA TICI.EFOLIA, Cav. Chicla ! 



POLYACHRUS ECHINOPSOIDES, DC. Cbicla ! 



Perezia MrLTiELORA, Less. Var. involucri squamis latioribus 

 apice vi^ mucronatis. Chicla ! 



Perezia ciltarts, IIooTc. et ^/v2. = Clarionea ciliaris, Don. 

 Upper valley of the Eimac above Matucana, i2. Ward. 



IIlERACIUM CHICLENSE, U. Sp. Chicla ! 



Perenne, rhizomate brevi, crasso, verticali ; caule elato 2-3- 

 pedali, ramoso, striato, inferne villoso, supernc glabreecentc ; foliis 



