December 12, 1908 83 
is Allium recurvatum and Erigeron macranthus with large blu 
ish rays; more rarely, clothed all over in a coat of long hairs, 
Flieracium Lemmont, and Aquilegia arizonica with flowers very 
small and red. Not far from Barfoot Park may be found Agwz- 
legia pubescens, and A. chrysantha with long-spurred light yel- 
low flowers, but 4. coerulea, the blue columbine of Colorado has 
not been reported south of the Graham mountains. 
On occasional areas may be met the greenish-yellow Hedz- 
opsis parviflora, the very trim and handsome Gentzana Wisliz- 
enit, blue and white, and again going back to the yellow, Ze#: 
ragonanthus Rothrockit, than which no plant is more oddly 
curious. 
A number of grasses.also contribute to the floral cover, but 
occupy a minor place except on open, southerly aspects. 
While a great variety of color, and frequently veritable 
masses of it, obtain in this little floral paradise, the preeminent 
tones may be said to be the reds earlier in the season, and the 
yellows in the afterglow of autumn. 
Tucson, Arizona. 
Is SPIRAEA PYRAMIDATA A HYBRID? 
In N. A. Flora 22: 251, Dr. Rydberg says this species is 
“by some regarded as a hybrid between .S. Zuczda and S. Men- 
ztesu.” He expresses the same idea in Bull. Torr. Club, 35: 
540. Mr. Holzinger, in Cont. U. S. Nat. Herb. 3: 221, also 
says it “may be a hybrid,” referring to it under no. 539 as S. 
betulifolia. ‘This no. 539 is the only collection of the plant that 
I haveever made. It grew in the woods near Farmington Land- 
ing, Lake Coeur d’Alene, Idaho, and so far as observed by me, 
can not be a hybrid, for only one other species, S. Menzzeszz, 
grew in the neighborhood. Perhaps others have actually seen 
the three growing in company. But can we say with certainty 
that any wild plant is a hybrid unless we have carefully observ- 
ed it in the field for several years, and have also experimented 
with the supposed parents ?—A. A. HELLER. 
