Rhodora 
148 [SEPTEMBER 
tionally in New York State, and then under special conditions. Con- 
sequently the recognition of this plant as a species has been delayed 
with the hope that more information might give it a natural range. 
A study of additional material in the Gray Herbarium and the her- 
barium of the Arnold Arboretum now shows that the plant has a 
typical Alleghanian range. Ashe has recently cited (Bull. Torr. 
Bot. Club, xlvi. 222, 1919) what is presumably the same plant as 
“frequent in bogs near Beltsville, Maryland." One of the speci- 
mens cited above from North Carolina is from the Piedmont Region; 
so the plant probably ranges over this region as well as in the moun- 
tains. Very likely it extends also to the mountains of Georgia. 
There is in the Gray Herbarium a fragmentary flowering specimen 
supposed to have come from Spach and labelled A. intermedia. So 
far as can be determined, this fragment agrees perfectly with our 
plant. Since Spach's description also agrees sufficiently well, it 
has seemed safe to adopt this name for the plant in question. It is 
probably a part of the 4. canadensis var. obovalis of Sargent's Silva 
(iv. 129, 1892), but not A. obovalis of Sargent's Manual of Trees. 
It is also A. intermedia, in part, of Britton’s publications. Most 
authors have confused it with A. oblongifolia of the Coastal Plain, 
and also to some extent with A. canadensis. A. intermedia is most 
closely related to A. oblongifolia. If it grew on the Coastal Plain 
it would be mistaken for a hybrid of that species and 4. laevis, as it 
seems to combine the characters of these two species. It is more 
distantly related to A. canadensis, which, however, is an entirely 
different plant. 'The three species may be contrasted as follows. 
A. INTERMEDIA A. OBLONGIFOLIA A, CANADENSIS 
Range: Piedmont and Alle- Coastal plain. Piedmont and west- 
ghany Mountains. ward. 
Habitat: Bogs. Swamps. Uplands. 
Habit: Alder-like. Alder-like. More arborescent. 
Leaf: Oblong, acute, of Oblong, obtuse or Ovate or obovate, 
shoots more laev- acute, not laev- acute or acuminate 
is-like, becoming is-like, becoming usually permanent- 
subglabrate, of- subglabrate, not ly hairy except far 
ten reddish when reddish when south and west, 
young; teeth fine, young; teeth fine, not reddish when 
more distant. close. young; teeth me- 
dium, sharp, broad- 
based. ý 
Sepals: Narrowly deltoid, Narrowly deltoid, Broadly ovate, abrupt- 
irregularly re- erect-spreading. ly reflexed. 
curved. 
Fruit: Dark, juicy. Dark, juicy. Red-purple, dry 
or juicy-mealy. 
