58 Rhodora | [Marcu 
specimen (F. T. Hubbard, no. 475a, Sept. 29, 1912); near Silver Lake, 
Wilmington (G. G. Kennedy, June 11, 1899); Wellesley, no data, speci- 
men in Herb. Wellesley College;' top of Blue Hill, Milton (G. G. Ken- 
nedy, July 10, 1899); woods by Purgatory Swamp, Norwood (F. F. 
Forbes, June 27, 1903). 
P. microcarpon Muhl. Blue Hills (W. H. Manning, Aug. 11, 
1894); “ The Pines," Milton (G. G. Kennedy, Aug. 23, 1894); Mil- 
ton, woods near Crossman’s (J. R. Churchill, July 4, 1910); Milton 
(H. H. Bartlett, no. 844; see Hitchcock € Chase, Contrib. U. S. Nat. 
Herb. xv. 182, 1910); Blue Hills, West Quincy (J. R. Churchill, 
July 11, 1891); Wellesley (W. P. Rich, June 14, 1899). 
P. uiLTACEUM L. Waste land, occasional. 
P. oligosanthes Schultes. Rocky soil, reasonably common, 
Waverly, Belmont (F. T. Hubbard, Oct. 13, 1912). An extension of 
range northward from New Jersey. 
P. oricola Hitchc. & Chase. Sand dunes, Ipswich ( K. M. Wiegand, 
June 25, 1908; F. T. Hubbard, Oct. 5, 1911; M. L. Fernald, Oct. 15, 
1911); Scituate (F. F. Forbes, Aug. 15, 1909). 
P. philadelphicum Bernh. Muddy and sandy pond shores, rare; 
Foster's and Long Ponds, Andover; Chadwick's Pond, W. Boxford; 
Johnson's Pond, Groveland; Winter Pond, Winchester. 
P. sphaerocarpon Ell. Dry sandy and gravelly woods and fields, 
frequent. 
P. spretum Schultes. Swamps and marshes, common. 
P. strictum Pursh. (P. depauperatum Muhl.; see Hubbard, 
Ruopora xiv. 169, 1912). Dry sandy and gravelly soil, common 
throughout. 
P.subvillosum Ashe. Dry soil, Gloucester, Ipswich, Wilmington, 
Malden, Woburn, Natick. 
P. tenesseense Ashe. Woods and fields, usually in coarse soil; 
Gloucester, Manchester, Wenham, Winchester, Cambridge, Boston, 
Framingham, Milton, Scituate, Sharon, Stoughton. 
P. TEXANUM Buckl. Cotton waste from mills, Malden (F. S. Collins 
& C. W. Swan, Sept. 14-15, 1888). A fugitive weed, native in Texas 
and northern Mexico. 
P. tsugetorum Nash. Dry sandy fields and woods, frequent. 
1 The specimens reported in Ruopona xi. 82, 1909, from Wellesley prove to be P. 
isugetorum; those reported from Ipswich, in the same notice, prove to be P. tsuge- 
torum and P. oricola. 
