TREES AND SHRUBS 99 



light and drought very well. There is but one reason for not 

 using it extensively as a shade tree, and that lies in the fact 

 that it is attacked by a borer, which ultimately kills it and 

 which is itself hard to kill. Its beautiful white sweet-scented 

 flowers produced so abundantly in the early summer are cer- 

 tainly delightful. 



The genus Parosela is represented by some 20 or more 

 species in New Mexico, and most of them are fairly common, 

 but the greater number of them are herbaceous annuals or 

 perennials. Two or three species are low shrubs and worth 

 cultivation, especially at the lower levels, since they are very 

 drought resistant. One of them (Parosela formosa) is a low, 

 much branched shrub 2 or 3 feet high, with very small leaves 

 having leaflets less than )/% inch long and numerous small 

 purple flowers. Another species closely resembling this, but 

 with a white banner is Parosela frutescens.. 



On the sand hills of the lower valleys will be found a 

 gray shrub which seems to be all slender gray stems. Its 

 leaves are very minute and widely scattered. On the ends 

 of the stems during the blooming season are small crowded 

 clusters' of deep blue flowers, which are borne in considerable 

 profusion. This is Parosela scoparia, and it is worth cultiva- 

 tion in any of the warmer locations, because of its drought 

 resistance and its somewhat bizarre appearance. 



