50 BOTANICAL GAZETTE [JULY 
selves might readily be described as a separate species. T.V. Munson, 
an experienced horticulturist and botanist in whose observations I have 
great faith, has taken this view, and has called the group Prunus 
australis (ined.). This variety is supposed to have a distinctively 
southern distribution, and it does in fact represent exclusively the 
species at the extreme south; but the woolly pubescent-leaved speci- 
mens are mixed with the smooth leaved plants through northern Texas, 
Oklahoma and southern Kansas, and probably over a much greater 
range. The horticultural variety Wolf, which belongs distinctively 
to this group, originated in Wapello county, Iowa,‘ and the variety 
Van Buren, also characteristically pubescent, originated in the same 
state. This matter of distribution is especially interesting in connec 
tion with the examination of Scheele’s Prunus rivularis (see below). 
THE HORTULANA GROUP.— The species Prunus hortulana®’ was PI — 
posed by a horticulturist chiefly to clear up a cloud of horticultural 
difficulties. Further study of wild and cultivated plums has convinced 
Bailey® that this is “a mongrel type of plums, no doubt hybrids” of 
Prunus Americana and P. angustifolia. This view appears to me to 
be much the best one to take of the Aorfulana plums, as I have taken 
occasion to explain a year ago.?. The hortulana group is so large and 
contains so many distinct types that one does not get an intelligent 
idea of it when it is lumped off as a single species, coordinate with 
Prunus Americana and P. angustifolia. As soon as we view it 4% a 
group of hybrids we can account for the several more or less distinct 
subgroups. The best marked types in the horfulana group ate ~ 2 
Wildgoose type, the Wayland type (see below), and the Miner type — 
. hortulana Mineri'Bailey). The relations of these groups I have — 
already discussed in the article referred to above. One group; ho 
ever, is of special interest. This is the one which I have characterized | 
as the Wayland group.’ Credit is due to T. V. Munson? for calling — 
attention to the distinctness of this group, and for referring it e ! 
Scheele’s Prunus rivularis. 1 have given in another article” a 
*L, H. Bartey, Bull. Cornell Exp. Sta. 38: 14. 
5 L. H. BAILey, Garden and Forest 5:90. 1892. 
® Cornell Exp. Sta. Bull. 1 31: 170. 1897. 
7 Garden and Forest 10: 340, 18 7: 
* Ann. Rep. Vt. Exp. Sta. 10: 103. 1897. 
9 Catalogue, 1896. 
*° Garden and Forest 10: 350. 1897; see also Ann. Rep. Vt. Exp. Sta. /0¢. cit. 
