124 Rhodora [JULY 
lanchier, which, figured out, would mean about 2-5m. Willdenow gives 
the height as 2-2.5 m. In addition, Mr. Alfred Rehder has stated 
to the writer that the plant in European gardens commonly passing 
under the name A. ovalis is not low and stoloniferous but tall and fasti- 
giate. It seems very reasonable to believe therefore that the plant 
imported at that early period and propagated in the European gardens 
was a constant form, of hybrid origin, in which the leaf- and flower- 
characters of A. stolonifera were combined with the habit of A. oblongi- 
folia. For this reason both of these names have been considered 
as invalid for any species described in this paper. 
Another name which has recently been taken up for an apparently 
artificial group of forms belonging to various species and including 
hybrids, is the Amelanchier intermedia of Spach.! This, also, was 
described from garden material (* . . .n'est pas rare dans les jardins. 
Elle est sans doute originaire de l'Amerique septentrionale"). The 
original description, which is lengthy, suggests the arborescent hairy 
species; "...les jeunes (feuilles) laineuse. ..Laniéres calicinales... 
réfléchies aprés anthése,...Petit arbre. Rameaux divariqués. . . 
Pétales longs d'environ 6 lignes. ..," although the description of the 
leaf and of the form of the sepals is not very good for that species. 
In the Gray Herbarium, however, there is a specimen named 4. 
intermedia by Spach himself. 'This is a sprig of flowering material 
and hence imperfect. The hypanthium is rather large for A. cana- 
densis, and the sepals, though abruptly reflexed, are mostly longer 
and narrower than would be normal for that species. In one flower 
however there is a suggestion of the broad sepals of A. canadensis. 
Both the acute leaves and reflexed sepals exclude A. oblongifolia. 
The specimen should be interpreted, probably, as either an extreme 
form of 4. canadensis or a hybrid of that species with 4. laevis. 
If we begin now with the shrubby species with coarse teeth we find 
that in 1803 Michaux described a Mespilus canadensis y rotundifolia: 
"arborescens; foliis sub-orbiculata-ovalibus, utrinque rotundatis.— 
in Canada." "The identity of this variety of Michaux has long been 
in doubt, and the name has been used by various authors for quite 
different plants. The original description is exceedingly brief and 
very indefinite. The word "arborescens" suggests something taller 
than a shrub, but Michaux used the term “arborea” on the same 
1 Hist. Veg. Phan., ii. p. 85 (1834). 
? Fl. Bor. Am., i. p. 291. 
