MIDDLESEX FLORA. 105 



C. spectabile, Sw. Showy Lady's Slipper. 

 Wilmington (Baldwin's Orchids of N. E.) ; Reading, found in a 

 cedar swamp in 18(36 (Miss Cl3'meua Wakefield) ; Concord, intro- 

 duced from Conway, N. H., by Minot Pratt. Very rare. July. 



C. acaule, Ait. Lady's Slipper. 

 Common. A f<irin with white flowers reported at Ashby by F. S. 

 Collins, and at N. Reading by John Robinson ; rare. May-June. 



AMARYLLIDACE/E. AMARYLLIS FAMILY. 



Hypoxys, L. 



H. erecta, L. Star Grass. 

 Common. May-Aug. 



H/EMODORACE/E. BLOODWORT FAMILY. 



Aletris, L. 



*A. farinosa, L. Colic-root. Star-grass. 

 Framingham (Rev. J. H. Temple). Rare. July- Aug. 



IRIDACE^. IRIS FAMILY. 



Iris, L. 



I. versicolor, L. Larger Blue Flag. 

 Common. May-Jime. 



I. Virginica, L. Slender Blue Flag. Boston Iris. 

 Less common than the preceding. May- June. 



/. Pseudacorus, L. 

 Occasionally escaped, but hardly established. Int. from Eu. 

 " Beardless ; leaves sword-shaped, lanceolate linear, about equalling 

 the terete, many flowered stem; sepals ovate with a broad claw, 

 the linear petals nari-ower and shorter than the pistils. Flowers 

 yellow, the sepals having in place of the beard, a yellow spot, 

 marked with very fine black or dark purple veins." Koch, Syn. 

 Fl. Germ. 



SiSYRINCHIUM, L. 



S. anceps, Cav. (S. Bermudiana, L., Man., in part.) 



Common. May-July. A form with pure white flowers has been 

 observed at Reading by W. H. Manning. 



