MIDDLESEX FLORA. 103 



*H. oUusata, Richards. 



Concord, introduced from Wachusett by Minot Pratt. June. 

 H. Hookeri, Torr. 



Ashby (W. H. Manning); Stoneham (Mrs. P. D. Richards); 



Hopkinton (Dr. C. W. Swan). Rare. June. 

 H. orbiculata, Torr. 



Generally distributed, but not common. July. 

 H. ciliaris, R- Br. YELLOW FRINGED-ORCHIS. 



Lexington, 1862 (Wm. Boott), specimen in the Gray herb. Very 



rare. July-Sept. 

 H. blephariglottis, Hook. WHITE FRINGED-ORCHIS. 



Generally distributed, but rare. July-Aug. 

 H. blephariglottis, Hook., var. holopetala, Gray. 



Littleton (W. H. Manning). July-Aug. 

 H. lacera, R. Br. RAGGED FRINGED-ORCHIS. 



Common. July-Aug. 

 H. psycodes, Gray. PURPLE FRINGED-ORCHIS. 



Common. A form at Maiden with white flowers (F. S. Collins). 



July-Aug. 

 H . f imbriata, R. Br. LARGER PURPLE FRINGED-ORCHIS. 



Generally distributed, but not common. June-July. 



GOODYERA, R. Br. 



G. repens, R. Br. RATTLESNAKE PLANTAIN. 



Not uncommon. Aug. , 



G. pubescens, R. Br. RATTLESNAKE PLANTAIN. 



Rather common. July-Aug. 



SPIRANTHES, Rich. 



S. latifolia, Torr. 



Groton (Miss H. E. Haynes) ; N. Reading (W. H. Manning). 



Rare. June. 

 S. cernua, Rich. LADIES' TRESSES. 



Common. Aug.-Oct. 

 S. graminea, Lindl., var. Walteri, Gray. 



Townsend (Miss H. E. Haynes); Billerica (W. H. Manning). 



Rare. July-Aug. 

 S. gracilis, Bigel. SLENDER LADIES' TRESSES. 



Common. July-Oct. 



ARETHUSA, Gronov. 



A. bulbosa, L. 

 Frequent.' May. 



