150 



TKE PYROLAS, 



XXXIX. THE PYROLAS. 



Description. — There are five or six species of these ele- 

 gant plants growing in the woods of the Northern States, 

 Canada, and southward along the mountains. One or all 

 of them may fall in the way of the col- 

 lector, the flowers in June or July, the 

 fruit in September. The dry stalks of 

 the last season with empty pods (better 

 than none) should be collected with the 

 flowers. 



Analysis. — We now adopt a new 



Fig. XXXIX.— Pyrola rotundifdlia : 2, section of a flower bud showing the anthers 

 inverted ; 3, section of a flower : 4, 5, stamens— anthers erect. 



method of analysis. We direct attention, 1st, to such char- 

 acters as apply equally to all the species of a genus, i. e., 

 the generic characters. These are mainly but not entirely 



