165 



157. C. hirsutum Mill. Large Yellow Lady's Slipper. tC. pnhescem WilM.) 



Pound in dry soil by Yarnelle's landing. 



158. Habenai'ia lacera (Michx) B. Br. Ragged Orchis. 



Found in the southwestern portion of the lake plain. 



159. H. leucopaea (Nutt) Gray. White-fringed Prairie Orchis. 



In the tamarack marsh northeast of the lake. 



160. H. psycodes (L.) Gray. Purple-fringe<l Orchi.s. 



Southeast edge of lake plain. 

 101. Pogonia ophioglossoides (L.) Ker. Rose Pogouia. 

 In the tamaracli northeast of the lake. 



162. Gyrostachys gracilis (Bigel) Kuntze. Slender Ladies' Tresses. 



Pound in a dry wood east of the lake. 



163. Corallorhiza odoutorhiza (Willd.) Nutt. Small-flowered Coral Root. 



Not rare in a wood south of the outlet. 



164. Limodorum tuberosium L. Grass Pink. (Calopogon pulchellvs R. Br.) 



Abundant in tamarack northeast of the lake. 



165. Saururus cernuus L. Lizard's Tail. 



In wet gi'ouuds along Chei-ry Creek and Clear Creek. 



166. Juglaus nigi-a L. Black Walnut. 



Scattered in rich woodlands. 



167. J. cinera L. Butternut. 



Occasional, in woodlands. 



168. Hicoria ovata (Mill) Britton. Shagbark Hickory. (Carya alba Nutt.j 



In woodlands. 



169. H. laciniosa (Michx. f.) Sarg. Big Shellbark. (Carya sulcata Nutt.) 



In woods near Cherry Creek. 



170. H. alba (L.) Britton. Mocker Nut. White-heart Hickory. (Carya 



tomentosa Nutt.) 



A few trees noted. 



171. Populus alba L. White Poplar. 



A few trees have escaped cultivation near Warsaw. 



172. P. grandidentata L. Great-toothed Aspen. 



Occasional. 



173. P. tremuloides Michx. American Aspen. 



Grows along the lake shore near Chicago Pier. 



174. P. deltoides Marsh. Cottonwood. (P. monilifera Ait.) 



Not i-are in low gi-ounds. 



