„ 64 Rhodora [APRIL 
(Note.— Other extra-limital species of this family are likely to 
persist around old places, or occasionally to reproduce themselves. 
Those trees not known to have reproduced by seed are not included 
in this list.) 
` С. H. Кхомтлох, 
J. A. CUSHMAN, 
WALTER DEANE, 
А. K. Harrison, 
Commitee on local flora. 
FURTHER NOTES ON THE VASCULAR PLANTS OF THE 
NORTHEASTERN UNITED STATES. 
B. L. ROBINSON. 
In the February issue of КнороваА the writer put on record some 
new combinations which had been found essential to consistent usage 
in the work and publications of the Gray Herbarium. Several further 
combinations of similar nature are given below, together with their 
synonymy. ‘Those relating to the grasses are published by the kind 
permission of their respective authors. In several cases these com- 
binations, which have already appeared in the subspecific category, 
are here put on record in order that they may have also a technical 
accuracy in the varietal rank, it being likely that they will be so placed 
by many writers who, according to long-established usage maintain | 
the two categories, subspecies and variety, as being to a certain extent 
distinct. 
SAGITTARIA LATIFOLIA Willd., forma hastata (Pursh), n. comb. 
S. hastata Pursh, Fl. Am. Sept. ii. 396 (1814). 
PANICUM COLUMBIANUM Scribn., var. thinium Hitche. & Chase, 
п. comb. Р. unciphyllum, var. thinium Hitche. & Chase, RHODORA, 
viii. 209 (1900). 
Panicum Boscir Poir, var. molle Hitche. & Chase, n. comb. 
P. latifolium, var. molle Vasey, U.S. Dept. Agric. Div. Bot. Bull. viii. 
34 (1889). 
PANICUM HUACHUCAE Ashe., var. silvicola Hitche. & Chase in litt. 
quam forma typica altius gracilius laetiore viride minus pubescens; 
