HITCHCOCK — PLANTS OF AMES, IOWA. 519 



ORCHIDACE.^. 



Spiranthes cernua, (L.) Rich. Bot. Reg. — 0/)/irys cn-nua. L. 

 ypec. 



Low prairie ; infrequent. 

 Orchis spf.ctabilis, L. Spec. 



Springj places in rich woods; scarce. 

 Woods soutli of College, and reported elsewhere. 



Habenaria bracteata, (Willd.) R. Br. in Ait. f. Hort. Kew. 

 — Oi'ckis bracteata, M'illd. Spec. iv. 

 Rich woods ; rare. 



This species seems to be well distributed over the county, but is usually solitary 

 and only occasionally found. 



H. J.EUCOPH^EA, (Nutt.) Gray, Man. oth ed.— O/-C///5 leucop/i^a. 

 Xutt. Trans. Amer. Phil. Soc. N. S. vii. 1S41. 



Low prairie; infrequent. 

 Cypripehium candidum, Muhl. in Willd. Spec. iv. 



Low prairie not uncommon. 

 C. PUBESCENS, Willd, Spec. iv. 



Rich woods; infrequent. 



Woods west and south of College ; on Skunk river, and elsewhere. C. parvifio- 

 rum, Salisb. has been reported, but I doubt if it occurs with us. 



C. REGIN.E, Walt. Fl.— C. spectabilc, Salisb. Trans. Lin. Soc. i. 1791, 

 (read 178S).— C. album. Ait. Hort. Kew.— C. hirstitum. Mill. Diet.? 

 Rich woods; rare. 



Onlhe east side of Skunk river north of Ames, a short distance above the ford. 

 This species was formerly much more frequent, but many causes, not tlie least of 

 which are the ravages of eager students, have almost exterminated this beautiful 

 plant. 



IRIDA CE.E. 



Iris versicolor, L. Spec. 



Marshes: common. 

 Belamcanda Chinensis, (L.) Adans.— Zx-ia Chincnsis, L. Spec. 



Occasionally escapes from gardens. 



In tlie absenceof sufficient literature I have followed the Manual in the authority 

 for the accepted combination. The Xew York Catalogue gives B. Cliiueiisis, 

 (L. ) Redoute. 



SiSYRixcHiu^r axgustifolium, Mill. Diet. 

 Prairie; abundant. 



1 he white-flowered form is frequent. 



AMARTLLIDA CE.TZ. 



Hypoxis erecta, L. Spec. 2d ed. (Syst. Xat. 15th ed. ex Riehter. 

 Prairie; common. 



DIOSCOREA CE.E. 



DioscoREA viLLOSA, L. Spec. 

 Thickets; not uncommon. 



