76 PONTEDEEIACEAE 



3. Commelina Virgimca L. Virginia Day- flower. (Man. p. 240; 

 I. F. /. pop.) In moist soil, N. Y. to 111. and Mich., Fla., Tex. and 

 probably through tropical Am. to Paraguay.— Pennsylvania ; Lancaster, 

 Safe Harbor ; Franklin ; Dauphin. 



4. Commelina ereota h. SLENDER Day-Flower. (Man. p. 240 ; 

 I. F. /. 908.) In moist soil. Pa. to Fla., Tex., and in tropical Am. — 

 Pennsylvania : Lancaster. 



5. Commelina hirtella Vahl. Bearded Day-flower. (Man. p. 

 240; I. F. /. po6.) In moist soil, N. J. to Mo., Fla. and Tex. — Penn- 

 sylvania : Lancaster, on the Susquehanna ; York, York Furnace. 



Family 4. PONTEDEEIACEAE Dumort. Pickerel-weed Family. 

 Stamens 3, or rarely 1-4: perianth regular : fruit capsular, i. Heteranthera. 

 Stamens 6 : perianth irregular : fruit utricular. 2. Pontederia. 



1. HETERANTHERA R. & P. 



Leaves not differentiated into blade and petiole, linear : perianth yellow. 



1. I/, dubia. 

 Leaves differentiated into petiole and blade : perianth white or blue. 



2. H. reniformis. 



1. Heteranthera dubia (Jacq.) MacM. WATER St.^r-GRASS. (Man. 

 p. 243 ; I. F./. gi8.) In still water, Ont. to Ore., Fla. and Mex. Also 

 in Cuba. — Pennsylvania : Northampton ; Bucks ; Huntingdon ; 

 Franklin ; Lancaster ; Dauphin ; Chester ; Delaware ; Erie. 



2. Heteranthera reniformis R. & P. Mud Plantain. (Man. p. 243 ; 

 I. F.y. 916. ) In mud or shallow water, Conn, to N. J., 111. and Kans., La. 

 and in Central and S. Am. — Pennsylvania : Northampton ; Bucks ; 

 Berks ; Lancaster ; Dauphin ; Franklin ; York ; Chester ; Dela- 

 ware. 



2. PONTEDERIA L. 



1. Pontederia cordata L. PickerEL-wEED. (Man. p. 243 ; I. F. 

 /. p/5.) The borders of ponds and streams, N. S. to Minn., Fla. and Tex. 

 Pennsylvania : Northampton ; Monroe ; Lancaster ; York ; Sus- 

 quehanna ; Crawford ; Chester ; Lehigh ; Delaware ; Erie. 



la. P. cordata lancefolia (Muhl.) Morong. (Man. p. 243. ) Monroe; 

 Lehigh. 



ORDER 8. LILIALES. 



Styles present, distinct or united i stigmas terminal. 

 Sepals and petals chaffy. Fam. i . Juncackae. 



Sepals and petals not chaffy. 

 Styles distinct : capsule septicidal and rarely also loculicidal. 



Fam. 2. Melanthaceae. 

 Styles united : capsule primarily loculicidal. 

 Plants with bulbs, corms or woody caudices. Fam. 3. Liliaceae. 

 Plants with elongated rootstocks. Fam. 4. Convallariaceae. 



Styles wanting : stigmas introrse, sometimes elongated. 

 Flowers perfect. Fam. 5. Trilliace.\e. 



Flowers dioecious. Fam. 6. Smilacaceae. 



