34 Rhodora [FEBRUARY 
. complete, are apparently usually cleistogamous. In the eight sheets 
examined in the National Herbarium, all collected in Emmet County, 
Iowa, by R. I. Cratty, very few flowers with fully developed corolla 
and stamens have been found. 
In the purple-flowered group all gradations exist between the nearly 
or quite apetalous flowers, with stamens greatly reduced or perhaps 
sometimes entirely wanting, and the petaliferous flowers. The pres- 
ence of cleistogamous flowers in all four species of the L. hirta group, 
and their extreme development in L. leptostachya, make it necessary 
to abandon this character in the future in distinguishing our two 
groups of species. 
Bureau oF PLANT INDUSTRY, 
Washington, D. C. 
REPORTS ON THE FLORA OF THE BOSTON 
DISTRICT,—XLIII. 
COMPOSITAE. 
ACANTHOSPERMUM. 
A. AUSTRALE (Loefl.) Ktze. See Rnopona ix. 26, 1907. Cabbage 
field, from woolwaste, Lawrence (Mrs. E. S. Schneider, no date); 
S. Boston flats (C. E. Perkins, (?) Sept. 25, 1881). 
ACHILLAEA. 
A. LANULOSA Nutt. Dry sandy soil, rare; Newbury, Manchester, 
Revere, Malden, Wellesley, Readville. 
A. MiLLEFOLIUM L. Dry fields and roadsides, very common 
throughout. 
A. Prarmica L. Moist soil, spontaneous in gardens and escaped; 
Danvers, Lynn, Salem, Jamaica Plain. 
A. TOMENTOSA L. Woolwaste, Westford (Miss E. F. Fletcher, 
1884 et seq.). Specimen in herb. Gray. See RHopona x. 127, 1908. 
AGERATUM. 
A. HovsroNriANUM Mill. (A. mexicanum Sims.) Lynn (E. & C. 
E. Faxon, Sept. 23, 1880). Specimen in herb. Gray. Native of 
Mexico. 
