CERTAIN SPIR^ACEiE. 221 



Spiraea lucida, DougL; Hook. Fl. Bor.-Am. i. 172 (1833, 



a manuscript name by Douglas, printed as a synonym): 

 S, hetuhvfolia of recent ximerican authors, in part, btems 

 erectj mostly simple, 1 or 2 feet liigli, of annual growth from 

 horizontal running and woody not deep-seated rootstocks or 

 roots: lowest leaves small and obovate, the upper oval, 1 or 

 2 inches long, acutish, incisely serrate, glabrous throughout, 

 pale and glaucescent beneath: inflorescence a glabrous ter- 

 minal compound fastigiate corymb: flowers wdiite: calyx-tube 

 broadly campanulate, the broadly ovate lobes short, embracing 

 the base of the follicles; these 5, glabrous or puberuleut, 

 1 to 1| lines long, tipped with a style half as long. 



Yar. ROSEA, S. bet ulmf alia, var. rosea, Gray, Proc. Am. 

 Acad. viii. 381. Subterranean characteristics not noted: stem 

 more slender, rather freely branching: corymbs at the ends 

 of all the branches, small: flowers rose-red. 



The type is common in dry woods of Montana, Idaho and 

 eastern Washington. Excellent specimens, showing the 

 peculiar mode of growth from an underground horizontal axis, 

 have been collected near Helena and distributed by Mr. Kel- 

 sey. Fartlier westward, at Tliompsou's Falls, wliich must be 

 near one of Douglas' stations, I obtained it in 1889, in good 

 fruit, the fruiting corvmbs measuring from tliree to seven 

 iuclies in breadth. The variety rosea is known only from 

 subalpiue heights on the mountains, from middle California 

 northward to Mt. Kainier. It is very likely to prove specif- 

 ically distinct. 



« 



Spir.ea pyramidata. Near the type of the preceding and 

 apparently of the same habit, but taller; the simple stem 

 leafy throughout, and bearing at summit a large very dense 

 pyramidal panicle of small white flowers: calyx-lobe broadly 

 ovate, reflexed: follicle glabrous, scarcely a line long, tipped 



with a style of equal length, 



Dry woods of the lower Yakima Eiver, near Clealura, 

 Washington, August, 1889; collected by the writer. Thi 

 may be the 5-. densifora of Nuttall, of which the name only 



