444 MINNESOTA BOTANICAL STUDIES. 



1881; Vail, A. Ccntrib. Bot. Va. Mem. Torr. Bot. Club. 2:32. 1890; 

 Michx. Fl. N. Am. 2:161. 1803; Chapman. Fl. S. U. S. 464. 1887; Tracy, 

 Fl. of Miss. 1885; Wood. A. Bot. and Fl. E. of Miss. 326. 1874; Gat- 

 tinger, A. Tenn. Fl 84 1887; Jones, H. L. Cat. Phan. and Ferns. Lick 

 Co. O. 82. 1892; Wright, A. A. Prelim. List. Fl. PI. and Ferns. Lor- 

 raine Co. O. 24. 1889; Bull. Chic. Acad. Sci. Cook Co. 111., Lake Co. 



Ind. 2:113. ; Rept. State Hort. Soc. Mich. 504. 1880; Beal and 



Wheeler. Mich. Fl. 138. 1892; Trans. Wis. Acad. 9:618. 1893; Brendel. 

 Fr. Fl. Peoriana 60. 1887; Smith, B. B. Fl. Kan. 1892; Cragin. Bull. 



Wash. Coll. Lab. Kan. 2:57. 1889; Suksdorff. Fl. Wash. 12. : Mac- 



Millan. Metasp. Minn. Val. 163. 1892; Upham, W. Minn. Phanerog. 

 142. 1884; Dana. How to Know Wild Fl. 124. 1893; Baldwin. H. Orch- 

 ids of N. E. 27. 1884. 



A perennial, which is minutely pubescent throughout, slen- 

 der and one and one-half to four dm. high. The rhizomes 

 which are sometimes several cm. long, brown, and carrying 

 tufts of fibrous rootlets, show a white fracture. The stem is 

 one to three dm. high, erect, and rarely somewhat tortuous. 

 The leaves, three to five in number, are eight to sixteen cm, 

 long, lanceolate to ovate-lanceolate, sparingly pubescent to 

 glabrous and have seven or nine prominent nerves. The slen- 

 der, rugose peduncle is five to eleven cm. high, straight or 

 slightly bent, and is sometimes compressed hexagonally. The 

 bract is two and one half to six cm. long, ovate lanceolate and 

 usually prominently five-nerved. The flower is small and is 

 agreeably fragrant. The sepals, two to five cm. long, are 

 purplish-brown in color and glossy while the two inferior sepals 

 are anastomosed as shown by the dentate apex, and the upper, 

 broadly, ovate-lanceolate sepal is erect. The lateral petals, 

 two or five cm. long, colored like the sepals, are long, lanceolate, 

 somewhat pendulous and inclined to twist. The basal inner 

 surface of the sepals and paired petals carries long hyaline 

 hairs. The labellum, two to four cm. long, is ovoid, slightly 

 compressed laterally and in color is yellow with delicate brown 

 veins. The sterile stamen is one cm. long, one-half as wide, 

 ovoid, membranous and flecked with macules. The column is 

 short, declined, and the stigmatic area is ovate with a slight 

 central depression. The capsule is three to five cm. long, 

 brown, stnmgly ribbed and on the parietal placentae bears the 

 numerous, dull yellow ovules. 



Cypripedium parviflorum Salisb. is found in bogs, low woods 

 and on hilly ground, and generally flowering in May or June. 

 It ranges across the continent from Newfoundland to the 

 Rockies, in the Atlantic region and westward into the sub- 

 humid region as far as Kansas and Colorado. 



