MISCBI.I<ANBOUS SPECIFIC TYPES — IV. 157 



and still leafy branches red-brown, rather obscurely puberu- 

 lent : leaves all simple and undivided, suborbicular but per- 

 ceptibly broader toward the base, here subtruncate to sub- 

 cordate, commonly with 3 obscure rounded lobes very obtuse, 

 these lightly and coarsely crenate, diameter of leaf about 1 

 inch each way, texture uncommonly firm, both faces about 

 equally green, glabrous : fruits solitary, or rarely two to the 

 spike, very large, glandular scaberulous. 



Collected at 3800 feet, at San Mattias Pass, in the San 

 Pedro Martir Mountains, 28 June, 1905, by E. A. Goldman. 

 A fine addition to that group of the genus which has undivided 

 leaves, these in this species having the cut of those of some 

 gooseberry bushes. 



Spiraea simpi,ex. Akin to S. salicifolia, but low, simple, 

 scarcely more than a foot high, often only 6 inches, almost or 

 quite herbaceous, densely leafy from the base up to the soli- 

 tary sessile thyrsoid inflorescence with a narrow strongly 

 ascending foliage ; bark of a light red-brown, neither altogether 

 glabrous, nor yet more than obscurely puberulent : leaves 

 about l}i inches long, lance-oblong and lance-elliptic, acute, 

 closely, evenly and not deeply serrate, the serratures under a 

 lens strongly callous-tipped, lower face and margins not quite 

 glabrous : inflorescence subpyramidallythyrsiform, its branches 

 also the pedicels and calyx somewhat pubescent ; flowers 

 small, white ; teeth of calyx deltoid, acutish, erect, about 

 equalling the tube : follicles short, thick, glabrous, dull rather 

 than polished. 



Plant first known to me from the prairie regions of Canada 

 west of the Great Lakes, where it was collected by Prof. John 

 Macoun, first at Indian Head, Assiniboia, in 1895, then at 

 Brandon, Manitoba, in 1896. I chanced on specimens last 

 summer in my herbarium, duplicates of Professor Macoun 's 

 two collectings of this marked species. Thereupon I wrote 

 to my zealous friend Dr. Lunell of Leeds, North Dakota, 

 whose region is not far removed from the Canadian high 

 prairies, to ask if perchance he had met with such a Spiraea. 



