240 TWENTY-FIRST REI'ORT. 



1827 and 18G0, reported this plant, but it seems probable that he was mistaken 

 in his identification. A. A. Wright, in a list of the plants of Lorain county, 

 Ohio, published in 1889, notes Tipularia for that section. One specimen of 

 this plant has also been reported from Clifty Falls, Indiana, by Prof. A. H, 

 Young, so that there is a bare possibility of the plant being found as far north 

 aa southern Michigan. However, reports from the New York Botanical Garden, 

 the Gray Herbarium and the Field Columbian Museum, Chicago, all indicate 

 that no verified specimens have been found this far north. 



Possibly the rarest of the species known to occur in this state is the 

 Nodding Pogonia, Tripliora triantliopliora.. A few specimens of this orchid 

 have been collected in the Southern Peninsula. Gray's Manual reports the 

 habitat of this plant as "woods." Other rare species are Liparis liliifolia, 

 Cypripcdium arietinum, Orchis rotundifolia, Isotria verticillata, Peramium 

 tesselatum, Malaxis unifolia and Malaxis monophylla. . 



Certain of our orchid species have a well marked northern range in this 

 state. Among these may be mentioned Cytherea bulhosa, Lysiella obtusata and 

 three species of Ophrys. Cytherea is found in the Upper Peninsula and in the 

 northern part of the Lower Peninsula. It was collected in the Upper Peninsula 

 before 1850 by Wm. A. Burt, inventor of the Burt solar compass. Our record 

 for its most southerly limit is Isabella coimty, where it was collected by Irwin 

 F. Smith. From this point north it has been found, at sevei'al localities. Includ- 

 ing such isolated situations as Thimder Bay Island, Mackinac Island and Isle 

 Royale. This pretty little pink and yellow orchid, which resembles somewhat 

 a small Ladies'-slipper, is one of our distinctly boreal species, and probably 

 further investigations in the Upper Peninsula will prove it to be rather fre- 

 quent. 



As before indicated, there are certain species which have been found in 

 territory near or adjacent to Michigan which have not been reported for the 

 state. The northern Ladies'-slipper, Cypripedimn pas<serinum, reported from 

 Ontario on north, is likely to be found in the upper peninsula. Piperia unalas- 

 chensis is known to occur in Quebec, Ontario, and on westward, so that we 

 should expect to find it in the Upper Peninsula. Ibidium ovale is reported as 

 far north as Ohio and Illinois and should be sought for in the extreme southern 

 part of the state. 



In conclusion, it may be said that the orchid flora of the state, so fair as 

 known, comprises 70% of the total number of species known to occur within 

 the northeastern United States and Canada. 



