MIDDLESEX FLORA. 27 



EOBINIA, L. 

 E. PSEUDACACIA, L. LOCUST. 



Eatlier common. June. Nat. from the Middle States. 



E. viscosA, Vent. Clammy Locust. 

 Lowell, escaped (Dr. C. W. Swan) ; Ashland, sparingly naturalized 

 (Eev. Thos. Morong) ; Littleton, escaped (L. L. Dame). Slowly- 

 spreading in favorable localities. June. Int. from Va. 



E. HispiDA, L. Bristly Locust. Eose Acacia. 

 Ashland, sparingly naturalized (Eev. Thos. Morong) ; Maiden, 

 where it has formed dense thickets, and is spreading (F. S. Collins) . 

 June. From the South. 



Tephrosia, Pers. 



T. Virginiana, Pers. Goat's Eue. Tephrosia. 

 Not found iu the eastern towns, and nowhere very abundant. July. 



Desmodium, DC. 



D. nudiflorum, DC. 



Common. Scape occasionally leafy. Aug. 

 D. acuminatum, DC. 



Not uncommon. July-Aug. 

 D. rotundifolium, DC. 



Not uncommon in the eastern part of the county. Aug. 

 D. rotundifolium, DC, var. glabratum, Gray. 



Woods in Waltham (Bigelow's Fl. Bost., under Hedysarum humi- 



fusura). Countj' specimen in herb. Edwin Faxon. Aug. 

 *D. canescens, DC. 



Eoadside, Arlington, Aug., 18,53 and 1869 (Wm. Boott). 

 D. cuspidatum, Hook. 



Lowell (Dr. C W. Swan): Woburn (L. L. Dame). Eare. July- 

 Aug. 

 D. Dillenii, Darl. 



Medford (Mrs. P. D. Eichards) ; Westford (Misses Fletcher and 



Hodgraan) ; Lowell, Dracut and Townsend (Dr. C. W. Swan) ; 



Maiden and Wilmington (F. S. Collins). Aug. 

 D. paniculatum, DC. 



Widely distributed, but not very common. July. 

 D. Canadense, DC. 



Eather common. A form with white flowers reported at Newton 



by W. H. Manning. July-Aug. 

 D. rigidum, DC. 



Not uncommon in the northern and western towns of the county; 



reported al.-o at Woburn by M)-s. P. D. Eichards. Aug. 



