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474 MB. JOHN BALL ON THE 



a plant is found at a great distance from what appears to be its 

 native home. 



It has appeared to me interesting to see how far the collections 

 received from Patagonia serve to show that the range of the 

 Andes has served as a barrier between the floras of the eastern 

 and western sides of temperate South America. Leaving out of 

 account species that have a wide range throughout the entire 

 continent, and those which must be considered doubtful, I find 

 in the present small collection 30 species that are confined to 

 the eastern side of the Andes and 40 that extend to the vvestero 

 as well as the eastern side of the great range. 



Mr. W. Andrews is not a botanist, and does not use technical 

 terms, but he is evidently a good observer, and I have thought 

 it desirable to give in the following list, within inverted commas, 

 the notes which he sent with most of his specimens, and which 

 are preserved alone: with them in the Kew Herbarium. 



List of Plants collected in Patagonia by Mr. Williams Andrews. 



Eanunculace^:. 



13*. Clematis bonabiensis, DC. " Common in the valley 

 the Rio Negro, especially on theBalcheta and Bajalta Streams. 

 W. Andrews. This species is widely spread on the B. side of 

 South America. It has been collected throughout Argentana 

 from Bueuos Aires to the extreme northern provinces (Jujuy and 

 Oran), and it now appears that it extends southward to Pata- 

 gonia. This species has been wrongly attributed to Jussieu, as 

 it was first described and published by DeCandolle in the ' Begm 

 Vegetabilis Systema Naturale,' i. p. 145. Closely allied to this 

 is Clematis Rilarii, Spreng. Syst. Veg. Index, 177,= 0. triloba, 

 St.-Hil. non Heyne, which is also the same as C. tnontevidensis, 

 Spreng. Syst. ii. 667. This has an equally wide geographical 

 range, from South Brazil to Uruguay and Argentaria, and there 

 is a specimen in the Kew Herbarium from Patagonia collected 

 by Tweedie. 



* For convenience of reference I Lave affixed the numbers given with his 

 specimens by Mr. Williams Andrews which are marked in red pencil on the 

 labels in Kew Herbarium. In a few cases the same number 1b affixed to 

 Afferent species, and in several others specimens of the same species hare been 

 sent with different numbers 





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