150 



THE PYKOLAS. 



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 



