106 THE AMERICAN BOTANIST. 



of half-shady sphagnum bogs, where it appeared in bloom 

 on May 30 and flowered until June 20. In the deep sphag- 

 num in the shade of larches may be found the beautiful 

 Cypripedium acaule, the stemless lad3'-'s slipper, with its 

 large rose -purple drooping labellum cleft dow^n the centre. 

 They were in flower by May 30 and bloomed until June 

 18. The seeds were ripe by September 22. 



The commonest and perhaps the most beautiful of our 

 Cypripediums is C. spectabile, the showy lady's slipper. 

 The half-shady sphagnum bog is its chosen haunt and in 

 some such places it ma3^be found in great abundance. The 

 flowers on plants growing in shady situations are likely to 

 be pale in color w^hile those in sunny spots are apt to be 

 white, strongly marked above with rose-purple. This spe- 

 cies flowered from June 15 to July 15 and the seeds ripened 

 about September 25. 



One of the most deliciously fragrant of our Orchid aceae 

 is Hahenaria dilatata, the tall white bog orchis. Its hab- 

 itat is the halt-shady bog where it blooms from June 17 to 

 July 17 and the seed is ripe about September 25. Though 

 found in considerable quantities in certain localities this 

 orchid cannot be called common here. Habenaria hyper- 

 borea, the tall leafy green orchis, is, as far as size is con- 

 cerned, one of our most variable species as mature speci- 

 mens range from 6 inches to 3 feet in height. Their hab- 

 itat is the open bog, but some specimens here have chosen 

 averj^ peculiar haunt as they grow in the crevices of damp 

 rock. This species flowers from June 19 to July 15, and is 

 one of our commonest orchids. 



An exceedingly beautiful little plant is Orchis rotundi- 

 folia, the small round-leaved orchis, and its mauve flowers 

 have a most delicate perfume. I found the first in flowers 

 on June 20. This species is decidedly rare, and its haunt 

 is the tamarac swamp with a sphagnum bottom, where 

 it occupies rather a shady situation. Pogonia ophioglos- 

 soides, the rose pogonia, is a flower with a perfume which 

 for sweetness and a strange strong delicacy, is not equalled 

 by any plant with which I am acquainted. The odor is 



