124 Ka7csas Academij of Science. 



the insect's reward for service performed, namely : pollination of the 

 flower, which could scarcely be effected otherwise ; yet is absolutely essen- 

 tial to perpetuation of the species. In the economy of nature the service 

 and the reward are equal. 



792. Poo:onia ophioglossoides Ker, Snake-mouth, Damp meadows, E. 

 K. ; occasional. June. 



793. Triphora trianthophora Rydberg. Nodding Beard-lip. Rich woods, 

 E. K. 



794. Spiranthes cernua Rich. Nodding Lady-tresses. Meadows, Kaw 

 valley west to Ellsworth, and from Kinsley down in the Arkansas valley. 

 July. (ASU) 



795. Spiranthes vernalis Engelm. & Gray. Spring Lady-tresses. Grassy 

 meadows, E. K., west to Council Grove; not common. July. (S) 



796. Spiranthes gracilis Beck. Slender Lady-tresses. Dry woods, ex- 

 treme E. K.; occasional. August. 



797. Blephariglottis leucophsea RyQb. Prairie Fringed-orchis. Moist 

 prairies, E. K.; frequent. June. (ASU) 



798. Oncidium tigrinum La Llave and Lex. Tiger Orchis. Occasional 

 in the best houses. 



7-^9. Cattleya mendellii (Hort.) Mendell's Cattleya. Occasional in 

 private houses. 



800. Orchis spectabilis L. Showy Orchis. Rich, shady woods, Doniphan 

 to Wyandotte county, along the Missouri river; rare. May. (AU) 



