BEAL ON MICHIGAN FLORA. 59 



XYRIDACE^) Lindl. Yellow-eyed Grass Family. 



XYRIS L. 



613. X. flexuosa Muhl. Macomb Co.; S. W., Wright Cat.; Hubbardston, Wheeler; 

 Manistee, F. P. Daniels; Vestaburg, C. A. Davis; S. W., H. S. Pepoon. Rare. 



614. X montana H. Hies. Yellow-eyed Grass. X. flexuosa pusilla A. Gray. Lake 

 Superior, Gray's Manual, 6th edition. 



ERIOCAULACE^E Lindl. Pipewort Family. 

 ERIOCAULON L. 



615. E. septangulare With. Margin of Long Lake, Cheboygan Co., B. & K.; S. W., 

 Wright Cat.; Macomb Co.; Cooley; Escanaba, E. J. Hill; Alma, C. A. Davis. Infre- 

 quent. L. P. 



COMMELINACE^E Eeichenb. Spiderwort Family. 

 COMMELINA L. 



616. C. Virginica L. Virginia Day-flower. S. W. Wright Cat. 



TRADESCANTIA L. Spiderwort. 



617. T. reflexa Raf. Grass Lake, Cassopolis, Muskegon, C. F. Wheeler; Algonac 

 Co., W. S. Cooper. 



618. T. Virginica L. Common Spiderwort. Moist wooks. Ionia Co.; Grand Rapids; 

 Ann Arbor, Allmendinger Cat.; Hillsdale Co. Frequent. C. & S. 



PONTEDERIACE^: Dumort. Pickerel-weed Family. 

 PONTEDERIA L. 



?619. P. cordata L. Pickerel-weed. Borders of lakes and slow streams. Lakes in 

 Oakland Co.; Ann Arbor; Ionia Co., and northward. Th. 



*620. P. cordata lancifolia (Muhl.) Morong. P. cordata angustifolia Torr. Lake 

 St. Clair; Pine Lake, Ingham Co. 



HETERANTHERA R. & P. 



*621. H. dubia (Jacq.) MacM. Water Star-grass. H. gramlnea, Vahl. Ann Arbor, 

 Allmend. Cat.; Dexter, Dr. Elmore Palmer; Grand Rapids; Bay Co.; Hubbardston; 

 Alma, C. A. Davis. In streams. Common. C. & S. 



JUNCACEJE Vent. Rush Family. 

 JUNCUS L. 



*622. J. acuminatus Michx. Short-fruited Rush. Macomb Co.; Fruitport, E. J. 

 Hill; Hubbardston; Keweenaw Co., O. A. Farwell; St. Clair Co., C. K. Dodge; Alma, 

 C. A. Davis. 



623. J. articulatus L. Pointed Rush. Alger, C. F. Wheeler; Tuscola County, C. A. 

 Davis. Th. 



624. J. Balticus littoralis Engelm. Sandy shores. S. Haven, Bailey; to Petoskey; 

 Port Huron; Bay Co., G. M. Bradford. Oscodo and northward. A form of this species 

 is found at Hubbardston, Ionia Co., Wheeler; Port Austin, C. A. Davis. Th. 



625. J. brachycarpus Engelm. Short-fruited Rush. St. Clair Co., C. K. Dodge. 

 *626. J. brachycephalus (Engelm.) Buch. Small-headed Rush. J. Canadensis 



brachycephalus Engelm. Hubbardston; Ho well Junction, C. F. Wheeler; Bay Co., G. M. 

 Bradford. S. 



