7m IRIDACEAE— ORCHIDACEAE Cypripedium 



IRIDACEAE (Iris Family) 



Iris L. 



I. versicolor L. Larger Blue Flag. 



Common in meadows and seashore sands. Mid-May, early 

 June. 



I. prismatica Pursh. Slender Blue Flag. 



Infrequent in low ground of the Coastal Plain, New Castle, 

 Cecil and Sussex Counties. Late May, June. 



I. Pseudacorus L. Yellow Iris. 



An infrequent escape in meadows. Late May, June. Introd. 

 from Europe. 



Belamcanda Adans. 



B. chinensis (L.) DC. Blackberry Lily. 



Escaped to roadsides, New Castle and Cecil Counties. July. 

 Nat. from Asia. 



Sisjrrinchium L. Blue-eyed Grass. 



S. mucronatum Mx. (Including S. intermedium Bickn.) 



Frequent; fields, meadows and rocky woods, sometimes on 

 serpentine soil; Piedmont, and the northern part of our Coastal 

 Plain area. Late May, June. 



S. graminoides Bickn. (S. gramineum of Gray's Man., ed. 7.) 



Common throughout; meadows, damp woods and open road- 

 sides. Late May, June. 



S. atlanticum Bickn. 



Frequent; moist fields and ditch banks of the Coastal Plain. 

 Mid-May, June. 



ORCHIDACEAE (Orchis Family) 

 Cypripedium L. Moccasin Flower. 



C. Calceolus L. var. pubescens (Willd.) Correll. (C parviflorum 



Salisb. var. pubescens (Willd.) Knight. See Correll: Bot. 



Mus. Leaflet of Harvard University 7: 1-18, 1938.) 



Large Yellow Ladies' Slipper. 



Rare; in rich woodlands: Mt. Cuba (NC), Canby, 4 July 1893 



(D), and later collections by others; Stone Run (Ce), J. J. Carter 



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