128 Rhodora [Juv 
BALSAMINACEAE. 
IMPATIENS. 
I. biflora Walt. Moist soil, very common throughout. 
I. biflora Walt., forma albiflora (Rand & Redfield) Weatherby. 
Edge of pool, Billerica (C. A. Weatherby, Aug. 12, 1911). See Rao- 
DORA xix. 115, 1917. 
RHAMNACEAE. 
CEANOTHUS. 
C. americanus L. Dry open woods, common throughout. 
C. ovatus Desf. Dry rocky and sandy soil; Andover, near 
Haggett's Pond (Mrs. Belle P. Gowing, June 18, 1888; A. S. Pease, 
June 4, 1904; M. L. Fernald, June 17, 1911); N. Chelmsford (Mrs. 
A. R. Spalding, June 14, 1898); Lowell (Mrs. F. P. Spalding, June 
20, 1896). 
C. ovatus Desf. var. pubescens T. & G. Shadyside Grove, 
Andover (M. L. Fernald, June 17, 1911); abundant in dry sandy soil, 
Lynnfield (M. L. Fernald, June 16, 1917). 
RHAMNUS. 
R. carHARTICA L. Thickets and waste places, common. 
R. FRANGULA L. Large colony in low ground near railway, Wake- 
field (R. C. Bean, June 13, 1915); several trees by stone wall, Con- 
cord (Wm. Brewster, June 27, 1918). See Ruopora xx. 204-5, 1918. 
C. H. KNowrrow | Committee on 
WALTER DEANE Local Flora. 
DISCOVERY OF TRISETUM SPICATUM IN PENNSYLVANIA. 
Hanorp W. PRETZ. 
Ir is only the collector that can fully appreciate the charm of field. 
collecting with its varied experiences. Whatever else may be sug- 
gested by the circumstances surrounding the collection of Trisetum 
spicatum in Lehigh County, Pennsylvania, the writer is more than 
