256 TWENTY-FIRST REPORT. 



Reported from : — Roscommon Co. (G. H. Hicks) ; Chieboygan Co. (Beardsley and 

 Kofoid); Dickinson Co. (E. J. Hill, 1884); Emmet Co. (C. W. Fallass). 



2. Ophrys convallarioides (Sw.) W. F. Wight. (resembling Lily-of -the- Valley) . 



Listera convallarioides (Sw.) Torr. 



Moist woods and cedar bogs. June — Aug. Upper Peninsula and northern 

 part of the Lower Peninsula. Evidently more common than the preced- 

 ing species. 

 Specimens examined: — ^Antrim Co. (B. T. Blodgett, July, 1892); Marquette Co. 

 (B. Barlow, July, 1901); Benzie Co. (D. A. Pelton, June, 1888); Keweenaw Co. (O. 

 A. Farwell, 1887); St. Joseph Co. (C. F. Wheeler, June, 1890); Isle Royale (Dr. A. E. 

 Foote, 1868); Cheboygan Co., (H. C. Beardslee, July, 1890); Mackinac Island (C. 

 F. Millspaugh, July, 1898); Schoolcraft Co. (C. K. Dodge). 



Reported from :— Pictured Rocks, Alger Co. (G. H. Hicks); Grand Traverse Co. 

 (Beal's Cat., 1904) ; Bear Lake (E. J. Hill); Emmet Co. (Fallass and Swift), "locaUy 

 common". 



3. Ophrys auriculata (Wiegand) House, (auricled). 



Listera auriculata Wiegand. 

 Reported from: — Isle Royale by W. S. Cooper. Habitat, "bog forests". This 

 is the only known locality in the state for this species. See Cat. of the Flora of Isle 

 Royale, W. S. Cooper, Michigan Acad. Science, 1914. We have not seen hib speci- 

 mens. 



19. PERAMIUM Salisb. Rattlesnake Plantain. 

 Lip strongly saccate, with a short tip; spike cylindric, not one- 

 sided; leaves 3-6.6 cm. long 1. P. pubescens. 



Lip elongated; spike often one-sided (in a loose spiral in P. tesselata). 

 Margin of the lip recxu-ved or flaring; plants less than 3 dm. high. 

 Another acuminate; tip of galea distinctly recurved; 



flowers in a loose spiral 2. P. tessclatuin. 



Another blunt; spike distinctly 1-sided; leaves ovate, small 



(1.5-3 cm. long) 3. P. ophioides. 



Margin of the lip involute; plant large (3.5-4.5 dm. high) 4. P. decipiens. 



1. Pcraniiuin pubescens (Willd.) MacM. (downy). 

 Epipactis pubescens (Willd.) A. A. Eaton. 

 Goodyera pubescens R. Br. 



Downy Rattlesnake Plantain. 



Throughout, frequent in the southern part of the state, evidently rarer 

 north. Usually in dry woods. Aug. — Sept. 

 Specimens examined: — Cass Co. (H. S. Pepoon, Aug., 1904), No. 14; Ingham Co. 

 (F. L. Sleeper, 1867); Macomb Co. (Dr. D. Cooley, Aug., 1848); Lenawee Co. (W. 



