258 TAVENTY FIRST REPORT. 



(Mrs. K. Irwin, Aug., 1891); Bois Blanc Island (S. H. and D. R. Camp, Aug., 1894); 

 Isle Royale (Dr. A. E. Foote, 1868); Cheboygan Co. (H. C. Beardslee, July, 1890), 

 "very rare" ; Marquette Co. (W. M. Canby, Aug., 1868) ; Mackinac (H. H. Babcock, 

 Aug., 1869); Chippewa Co. (C. K. Dodge, 1914); Iron Co. (C. A. Davis, 1905). 



Reported from: — Jackson Co. (S. H. Camp); C^harlevoi.x, Leelanau and Benzie 

 counties (E. J. Hill); Roscommon Co. (G. H. Hicks), "rare"; Mackinac Island (C. 

 K. Dodge), "frequent". 



20. MALAXIS Solancl. 



Lip pointed at base; length of pedicels barely equally the 



ovaries; whitish flowers in a slender raceme 1. M. mono phylla. 



Lip truncate at base ; length of pedicels exceeding the ovaries ; 



flowers greenish, in a short spreading raceme 2. M. unifolia. 



1. Malaxis monophylla (L.) Sw. (one-leaved) . 



Microstylis monophyllos (L.) Lindl. 

 Achroanthes monophylla Greene. 

 White Adder's Mouth. 



Occasional throughout. Usually rare locally. Damp woods. June — July. 

 Specimens examined: — Belleville, Eaton Co. (C. A. Davis, July, 1893); Shelby, 

 Macomb Co. (Dr. D. Cooley, 1845); Washtenaw Co. (E. C. AUmendinger, 1860); 

 Mackinac Co., (T. E. Royce, July, 1881). 



Reported from: — Ionia and Genesee counties (Wheeler and Smith's Cat., 1881); 

 Cheboygan Co. (Beardslee and Kofoid), "bogs rare"; Isle Royale (A. P. Holt, 1908); 

 Emmet Co. (C. W. Fallass), "damp woods, very rare"; Oakland Co. and Bois Blanc 

 Island (C. Billington). 



2. Malaxis unifolia Michx. (with one leaf only). 



Microstylis unifolia (Michx.) BSP. 

 Microstylis ophioglossoides Nutt. 

 Green Adder's Mouth. 

 Damp woods. Rare. July— Aug. 

 Specimens examined: — Gogebic Co. (E. A. Bessey, 1919). 



Reported from: — Washtenaw Co. (Allmendinger's Cat.); Ionia and Lenawee 

 counties (G. F. Comstock); Bay Co. (B. M. Bradford); Emmet Co. (C. W. Swift), 

 "damp, mossy woods, ver>' rare". 



21. LIPAKI.S L. V. Richard. Twayblade. 



Leaves elliptical or ovate; lij) 10-12 nim. long, madder-puriile . 1 . L. liliifoliu. 

 Leaves elliptie-laiici'olate or narrower; lip 4 6 mm. long, 

 yellowish-green 2. L. loeselvi. 



