MICHIGAN ACADEMY OF SCIENCE. 119 



221. Pogonia ophioglossoides (L.) Ker. Pogonia. Sedge zone of Bog 

 Succession. 



222. Arethusa bulbosa L. Arethusa. Same habitat as last. 



223. Spiranthes Romanzoffiana Cham. Ladj^'s Tresses. Same habitat 

 as last. 



224. Epipactis repens (L.) Crantz. var. ophioides (Fernald) A. A. Eaton. 

 Rattlesnake Plantain. Bog forest; chmax forest. 



225. Epipactis tesselata (Lodd) A. A. Eaton. Bog forest; climax forest. 



226. Epipactis decipiens (Hook.) Ames. Chmax forest. 



*227. Epipactis pubescens (Wihd.) A. A. Eaton. Downy Rattlesnake 

 Plantain. "Rather dry woods." Holt. 



228. Listera cordata (L.) R. Br. TAvayblade. Bog forest, common. 



229. Listera auriculata Wiegand. Bog forest: Park Place; also mossy 

 bank of sheltered cove, same locality. 



230. Listera convallarioides (Sw.) Torr. Bog forest: Monument Rock 

 trail. 



231. Corallorhiza trifida Chatelain. Early Coral Root. Climax forest. 



232. Corallorhiza maculata Raf. Large Coral Root. Park Place. 



233. Corallorhiza striata Lindl. Striped Coral Root. Burn forest: 

 Park Place. 



*234. Liparis liliifolia (L.) Richard. "Moist woods and along bog 

 margins." Holt. 



235. Liparis Loeselii (L.) Richard. Sedge and sphagnum zones, Bog 

 Succession. 



236. Calypso bulbosa (L.) Oakes. Calypso. Park Place. 



Salicaceae. Willow Family. 



237. Salix balsamifera Barratt. Balsam Willow. Shore crevices and bare 

 burned ridges. 



238. Salix pedicellaris Pursh. Bog Willow\ Shrub zone, Bog Succes- 

 sion. 



239. Salix discolor Muhl. Glaucous Willow. Shrub zone, Delta Swamp 

 Succession; rock shore crevice. 



240. Salix humilis Marsh. Heath mat in rock openingj in climax forest; 

 burn forest. 



241. Salix rostrata Richards. Rock shore crevices; burn forest. 



242. Salix pellita Anders. Tobin's Harbor; 



243. Salix phylicifolia L. Shrub zone. Bog Succession: head of Siskowit 

 Bay; Gull Islands. 



244. Populus tremuloides Michx. Aspen. Occasional in the climax forest 

 and in rock shore crevices; frequent in the xerophytic forest stage of the 

 Rock Shore Succession; abundant in the burn forest, second only to Betula 

 alba papyrifera. 



*245. Populus grandidentata Michx. Large-toothed Aspen. "Princi- 

 pally along the Greenstone Ridge; not at all common as compared with P. 

 tremuloides." Holt. 



246. Populus balsamifera L. Balsam Poplar. Occasional in the climax 

 and burn forests and in rock shore crevices. 



