or THE PKEUYIAN ANDES. 55 



AmAEANXACKjE. 



Amaha>'TUS cnLOROSTACiiYS, WiUd. Frequent in the valley 

 of the Eimac, extending up to the level of about 9000 feet! 



The Aviarantacece^ which abound in the lower region of tropical 

 and extratropical South America, do not seem to ascend to high 

 levels. The present species, w^hich is almost universally diffused 

 throughout the continent, is the only repreisentative of the order 

 seen by me in the middle region of Peru. A few miles below 

 Matucana five or six species of this order w^ere seen on the side 

 of the railway line. 



CuENOPODIACEiE. 



Chexopodiitm ambrosioides, L. Upper valley of Eimac ! 

 This ascends to about the same level as the last species ! 



Ullucus tubeeosus, Moq. On rocky ground about Chicia! 



PnYTOLACCACE^. 



Phytolacca octakdra, L. Upper Eimac valley, near Matu- 



cana ! 



POLYGONACE^, 



csTEis. Wedd.. 



M. 



Meisn. in J). C. Fi'od. Very common about Chicia! 



M, 



M. 



The former 



is distinguished by larger size, more rigid woody branches, larger 

 leaves, more persistent ochrese, and shorter pedicels to the flowers ; 

 but I found all these marks to be eminently variable in the plant 

 which abounds at Chicia, and which well agrees Avith authentic 

 specimens of J/", vulcanica. I doubt w^hether this can be well 

 distinguished even as a variety. 



The synonymy of these phints has become a little complex, 

 but J/, rupestris was the first correctly referred to the genus 



Mueh 



Wedd. in Ann, Sc. Nat, ser. 3, xiii. 256 (1849) 



Polygonum fruticulu^^um, W(dj), Nov. Act. Acad. Leap. xix. 



supph 1, 407, 



Me 



Polygonum 



volcanicum, Benth. Ph Hartw. 81 = Mu 

 Endl. Gen, suppl, 1, pars 2, p. 51. 



