Flora of Vermont 183 



COMMELINACEAE. SPIDERWORT FAMILY 



COMMELINA. Day-flower 

 C. coiiiiiiunis L. Occasional as a garden escape. 



TRADESCANTIA. Spiderwort 

 T. ju'losa Lelim. Ilartland, (Underwood). 



PONTEDERIACEAE. PICKEREL-WEED FAMILY 



HETERANTHERA. Mud Plantain 



H. (lul)ia (Jacq.) MacM. (H. graminea Vahl). Water Star Grass. 

 Ponds and streams of the Champlain Valley; frequent. 



PONTEDERIA. Pickerel-weed 



P. eordata L. Borders of ponds and slow streams in the lower alti- 

 tudes; frequent. 



JUNCACEAE. RUSH FAMILY 



JUNCUS. Rush. Bog Rush 



J. acuniiiiatus Michx. Sharp-fruited Rush. Wet meadows; Essex, 



(Jones). 

 J. alpinus Vill. Willoughby Lake, (Eggleston). 



J. alpinus Vill., var. fnscescens Fernald. Knight's Island, (Brainerd). 

 J. alpiiuis Vill., var. insignis Fries. Wet gravelly shores of Lake 



Champlain; Knight's Island and Shelburne, (Pringle) ; Burlington, 



(Mrs. N. F. Flynn). 

 J. articulatus L. Jointed Rush. Wet grounds; occasional. 

 J. articulatns L., var. obtnsatus Engelm. Manchester, (Mary A. Day). 

 J. braohycephalus (Engelm.) Buchenau. (J. canadensis J. Gay, var. 



brachycephalus Engelm.). Moist sandy soil; occasional. 

 J. brevicaudatus (Engelm.) P"'ernald. (J. canadensis J. Gay, var. brevi- 



caudatus Engelm.). Common, especially in the mountains. 

 J. bufoiihis L. Toad Rush. Low ground; common. 

 J. biifoiiis L., var. coiigestus Wahlb. Burlington, (Mrs. N. F. Flynn). 

 J. canadensis J. Gay. Borders of ponds in the lower altitudes; fre- 

 quent. 

 J. Dudleyi Wiegand. Damp soil; frequent. 

 J. effusus L., var. Pylaei (Laharpe) Fernald & Wiegand. Rhod. 12: 92. 



Bog Rush. Marshy ground; common. 

 J. effusns L., var. solutus Fernald & Wiegand. Rhod. 12: 90. Essex, 



Burlington, and Underbill, (Blake). 

 J. tiliforniis L. Sandy shores of northern Lake Champlain and on 



mountain summits; occasional. 

 J. Gerardi Loisel. Black Grass. Marshy meadow near railroad station. 



New Haven, (Brainerd). Perhaps introduced with salt hay used in 



packing. 

 J. Greenii Oakes & Tuckerm. Newfane, (M. A. Howe). 



