1910}  Howe,— Ramalina Montagnaei on Long Island 7 
COMMELINACEAE. 
COMMELINA. 
C. communis L. Waste places; Boston, Cambridge, Chelmsford, 
Dover, Winchester. 
TRADESCANTIA. 
T. viraintana L. Waste places; Ashland, Framingham, Marsh- 
field, Needham, Walpole. 
PONTEDERIACEAE. 
HETERANTHERA. 
H. dubia (Jacq.) MacM. Pleasant Pond, Wenham (G. E. Daven- 
port, Aug. 16, 1875. Specimen in Gray Herb.) 
PON'l'EDERIA. 
P. cordata L. Muddy ponds and streams, common throughout. 
C. H. KNOWLTON 
J. A. CUSHMAN Committee on 
WALTER DEANE Local Flora. 
A. K. HARRISON 
RAMALINA MontTaGNaE!I DENOT., oN Long Istanp.— Messrs. D. P. 
and J. E. P. Morgan brought me, in October, abundant material of 
this Austral lichen from Southampton, Long Island, N. Y., collected 
on cedars, September 15, 1909. Both the plant and spores are quite 
typical, the latter measuring u 24-32 X 4-5. This is the northern- 
most locality from which this lichen has been reported, having never 
been collected, so far as I am aware, north of South Carolina (Ravenel). 
The insular climate, and proximity to the Gulf Stream, explains no 
doubt its presence in this latitude. 
Examples are deposited in the author’s herbarium (No. 1677), also 
in Dr. L. W. Riddle’s, Wellesley, Mass., and in the herbarium of 
Harvard University, Cambridge, Mass.— R. Heser Howe, JR., 
Thoreau Museum, Concord, Massachusetts. 
