FLORA OF BURLINGTON AND VICINITY 27 



IRIDACEAE. IRIS FAMILY 



IRIS (Tourn.) L. Fi.eur-dE-us 



I. PSEUDACORUS L. Yellow Iris. A garden escape, bank of WinooskI 

 River, Essex, (Ross). June. 



T, yersicolor L. Wild Iris, Blue Flag. Wet meadows; common. June, 

 July. 



SISYRINCHIUM L. Blue-Eyed Grass 



S. aiigustifolium Mill. Meadows, fields and damp sandy soil; common. 

 May, June. 



ORCHIDACEAE. ORCHIS FAMILY 



ARETHUSA (Gronov.) L. 



A. bulbosa L. Sphagnum bogs; occasional. June. A white-flowered 

 form occurs, South Burlington, (Howe). 



CALOPOGON R. Br. 



C. pulchellus (Sw.) R. Br. Grass Pink. Bogs; occasional. June, 

 July. 



CORALLORRHIZA (Haller) Chat. Coral Root 

 C. maculata Raf. Large Coral Root. Woods; occasional. July, Aug. 



C. trifida Chat. Early Coral Root. Swamps and damp woods; occa- 

 sional. May, June. 



CYPRIPEDIUM L. Lady's Slipper. Moccasin Flower 



C. acaule Ait. Stemless or Pink Lady's Slipper. Dry woods; frequenr. 



May, June. 

 C. arietinum R. Br. Ram's Head Lady's Slipper. Occasional in rocky 



woods where it reaches great perfection, colonies of thirty-nine to 



fifty blossoms having been seen. May, June. 



C. liirsiitum Mill, Showy Lady's Slipper. Cold swamps; occasional. 

 June, July. 



C. parviflorum Salisb. Smaller Yellow Lady's Slipper. Bogs and low 

 woods; rare. May, June. South Burlington, (Torrey) ; Colches- 

 ter, (Griffin). 



C. parviflornm Salisb., var. pubeseeus (Willd.) Knight. Large Yellow 

 Lady's Slipper. Rich moist woods; frequent. May, June. 



