No. 14.] FLOWERING PLANTS AND FERNS. II3 



Xyris Smalliana Nash. 

 Xyris Congdoni Small. 



Rare or local. Borders of ponds or in sandy bogs : Salem 

 (Graves), East Lyme (Miss A. M. Ryon & Graves), Guil- 

 ford (G. H. Bartlett). Aug.— Sept. 



COMMELINACEAE. SPIDERWORT FAMILY. 



TRADESCANTIA L. Spiderwort. 



Tradescantia virginiana L. 



Trinity. Spiderwort. Spider Lily. Job's Tears. 



Rare or occasional. Roadsides and waste places, or some- 

 times in river meadows. In most cases adventive or natural- 

 ized from the southeastern United States as an escape from 

 gardens; possibly native at Southbury (Harger) and Fairfield 

 (L. N. Johnson). May — July. 



COMMELINA L. Day-flower. 



Commelina communis L. (growing in colonies). 

 Commelina nudiflora of authors, not L. 

 Day-flower, 



Occasional to frequent. Waste places and cultivated 

 ground as an escape from cultivation ; usually in or near cities. 

 July — Nov. Naturalized from the South or from Asia. 



PONTEDERIACEAE. PICKEREL-WEED FAMILY. 

 PONTEDERIA L. Pickerel-weed. 



Pontederia cordata L. (heart-shaped). 

 Pickerel-weed. 



Common. Shallow water of ponds and streams. July — 

 Aug. 



The var. angustifolia Torr. (narrow-leaved) occurs at 

 Old Lyme (H. S. Clark). 



HETERANTHERA R. & P. Mud Plantain. 



Heteranthera reniformis R. & P. (kidney-shaped). 



Rare. Muddy shores of the Housatonic River at Derby 

 (G. W. Hawes & Harger), and along the river southward to 

 salt water (Fames). Late Aug. — Sept.; fruit Sept. — Oct. 



