1921] Reports on the Flora of the Boston District,— XXXIV 117 



HALORAGIDACEAE 

 MYRIOPHYLLUM. 



M. altsrniflorum DC. Westford (Miss E. F. Fletcher, Sept. 2, 

 1902); Mystic Pond (Wm. Boott, Aug. 26, 1853; Aug. 6, 1865); 

 Sprague's Pond, Readville (C. E. Faxon, no date); by spring in mud, 

 W. Quincy (W. Deane, June 10, 1894). Southern limits of the species. 



M. exalbescens Fernald. (If. spicatum of Gray's Manual, not 

 L.) See Rhodora xxi. 120-122, 1919. Rivers and ponds, occasional 

 north of Boston. 



M. hu:nile (Raf.) Morong. Wet shores in mud and sand, fre- 

 quent. 



M. humile (Raf.) Morong. forma capillaceum (Torr.) Fernald. 

 Submersed in water of ponds, frequent. 



M. humile (Raf.) Mcrong, forma natans (DC.) Fernald. In 

 shallow water, occasional. 



M. ter.ellum Bigel. Ponds, occasional. 



PROSERPINACA. 



P. intermedia Mackenzie. See Torreya x. 250, 1910. Meadow 

 border, Lake Massapoag, Sharon (E. F. Williams & W. P. Rich, 

 Sept. 10, 1899). Specimen in herb. N. E. Botanical Club. 



P. palustris L. Swamps and ditches, common throughout. 



P. peclinata Lam. Tophet swamp, Carlisle (C. //. Knowlton, 

 Sept. 6, 1902); ditch between Hammond pond and Chestnut Hill 

 Station (W. Boott, June, 1855); meadows by river, Blue Hill Reserv- 

 ation (N. T. Kidder, Aug. 12, 1894); Hingham, according to T. T. 

 Bouv6, Botany of Hingham, in History of Hingham, i. pt. 1, 105, 

 1893. 



ARALIACEAE 



ARALIA. 



A. hispida Vent. Dry sandy soil, especially in clearings, com- 

 mon. 



A. nudicaulis L. Dry woods, very common throughout. 



A. nudicaulis L. var. elongata Nash. Needham (K. M. Wie- 

 gand). See Rhodora xii. 39, 1910. 



A. racomosa L. Rich woods, occasional, especiallyno rthward. 



