57^ Muhlenbergia, Volume 2 



Peramium Salisb. Rattlesnake plantain. 



Peramium DECiyiENS (Hook.) Piper. 4. Western rattle- 

 snake plantain. [P. Menziesii) Not nnconimon in coniferous 

 woods, Macleay Park, St. Helens road, Mt. Tabor, Mt. Scott, etc. 

 July to August; dull white. 



Ibidium Salisb. Ladies' tresses. 



Ibidium Romanzoffianum (Cham.) House. 4. Ladies' 

 tresses. {Gyrostachys Ronianzoffiana.) Moist or boggy ground 

 above Oswego and on Canyon road near old county poor farm, 

 June to August; white. 



Cytherea Salisb. Calypso. 



Cytherea BULBOSA (L) House. 4. Calypso. {Calypso bor- 

 ealis.) In leaf mold and mossy open woods, Macleay Park, east 

 of Gladstone and west of Oswego. The orchid family, which is 

 so generous with its floral offerings in the tropics, and so frugal 

 in the favors bestowed in our section, has compensated us for 

 much in the presence of this handsome little plant in our woods. 

 The showy, rose colored flowers with pinkish lip mottled with 

 madder-purple are not only beautiful in themselves, but the ex- 

 quisite fragrance which they exhale still further enhances the 

 value of this lovely species. April, May. 



PiPERIA Rydb. Orchis. 



PiPERiA ELEGANS (Liudl.) Rydb. 4. Forest orchis. {Ha- 

 benaria elegaus.) Open woods opposite Oswego. May to July; 

 greenish white. 



PiPERiA UNALASCHENSis(Spreng.) Rydb. 4. Slender orchis. 

 {Habenaria iinalaskensis.) Dry ridges in coniferous woods near 

 Linnton. May to July; greenish white. 



LiMNORCHis Rydb. Bog orchis. 



LiMNORCHis LEUCOSTACHYS (Lindl.) Rydb. 4. Large white 

 bog orchis. {Habenaj-ta ieitcostachys.) Boggy ground near Os- 

 wego. May to July; white. 



CORALLORHIZA [Haller] R. Br. Coral root. 



CORALLORHIZA MACULATA Raf. 4. Large coral root. (C 

 multifiora.) Moist open woods, Mt. Tabor, Mt. Scott, West 

 Portland. May, June; while mottled with pnrple. 



