NEW OR CRITICAL SPECIES OF ACER. 3 
like them, whereas the fruits are very large, and exhibit a pecu- 
liar breadth of wing for a member of the A. glabrum group 
These are either solitary or in pairs or threes, and are very short- 
peduncled. 
A. Nro-Mrxicanum. A tall clustered shrub freely branch- 
ing, the younger branches dark-red, perfectly glabrous, glauces- 
cent; leaves often trifoliolate, as often merely 3-parted or only 
trifid, the leaflets or segments obovate-cuneiform, deeply and 
doubly incised, acuminate at apex, in maturity often 3 inches 
long, on rather slender petioles of 24 to 5 inches: flowers rather 
numerous, almost umbellate, the petals commonly only half the 
length of the spatulate-oblong sepals; fruiting peduncles an 
Inch long or more, little longer than the pedicels; wings of 
fruit moderately divergent. | 
My type specimens of this are a good fruiting specimen with 
well developed foliage from the mountains near Las Vegas, New 
Mexico, by G. R. Vasey, 1881, and a flowering one from near Santa 
Fe, by Mr. Heller, this bearing the number 3,525 and being 
named A, glabrum. 
The species thus proposed do not, I think, exhaust the topic 
of possible good segregates of so-called A. glabrum ; but for the 
present, let these suffice. The next two new maples are of the 
_ group to which belongs A. circinatum. 
A. Macount. Of the size, habit, and almost the flowers of 
A. circinatum, but foliage very different, the lobes of the leaf 
being 5 only, rather longer in proportion and more triangular 
in outline, radiating around the undivided body of the leaf 
rather than pointing (digitately) forward from it, both faces 
quite glabrous even when young; flowers also glabrous, other- 
wise as in the allied species, nearly. 
Chilliwack Lake, British Columbia, James M. Macoun, 14 
July, 1901. The leaves of this are smaller than in A. circina- 
tum, and are so free from pubescence, that this character along 
with radiant leaf-lobes (quite as in maples generally) led Mr. 
Macoun to regard this as near A. glabrum. The few specimens 
are scarcely out of flower. 
