90 I. M. JOHNSTON 



leaves sparingly glaucous and oblong in shape. The stems are very slender 

 and average about 10 cm. in height. The cyme is not compounded much 

 and consists of usually less than 15 flowers, these latter being very pale yellow 

 in color. 



D. minor appears to be only a form of pumila that has broader calyx lobes. 

 This plant has at various times been placed under Dudleya nevadensis but 

 that is a very different plant and has a more northern range. (Nos. 1289, 

 1643, 1646.) 

 Sedum anomalum (Britton) B. & R. On the west end of Ontario Peak, in Cascade 

 Canon, this is very abundant on a talus-covered north-facing slope. Lower 

 Transition Zone, 4500-6500 ft. alt. Det. J. N. Rose. (Nos. 1288, 1814, 

 2053.) 



SAXIFRAGACE.E 



Boykinia rotundifolia Parry. Frequent in moist places in the Upper Sonoran and 

 Lower Transition Zones, reaching its maximum altitude of 6500 ft. in Icehouse 

 Canon. 



Heuchera Abramsii Rydb. Common at the type station on Baldy Summit. We 

 found the plant also on the west spur of Baldy and on Pine Mountain. On 

 these ridges it descends to the lower edges of the Canadian Zone, where it was 

 found to grow with H. elegans. We looked for signs of intergradation but 

 none could be detected even when the two species grew near each other. 

 (Nos. 1417, 1690, 1728, 2096.) 



Heuchera elegans Abrams. Frequent from the Upper Chaparral Belt to the lower 

 part of the Canadian Zone. Always growing in very rocky situations. At 

 5000 ft. alt. is about the lowest we have seen the plant, while 9000ft., on Tele- 

 graph Pk., is about the highest. The plant, in the San Antonio Mountains 

 at least, is by no means an Upper Chap xrral Belt species as it has been thought 

 to be. (Nos. 1395, 1456, 1559, 1561, 1733.) 



Ribes montigenum McClatchie. Baldy Summit is the type station of this widely 

 distributed subalpine shrub. It is common there, growing in the shelter of 

 the rocks that are scattered near the summit. On the west spur of Baldy it 

 descends to the 9000 foot contour, the lowest altitude at which it was seen. 

 To be expected on Pine Mountain, but we failed to find it there. (No. 1415.) 



Ribes cereum Dougl. Commo i in the higher parts of the Transition Zone and 

 through the Canadian Zone, reaching Baldy Summit. (Nos. 1272, 1419.) 



Ribes nevadense Kell. Common in damp ground along the streams in the Transi- 

 tion Zone. In the Upper Transition Zone it is often found growing in the 

 shade of the pines at some distance from water. This species is one of the 

 characteristic plants of the Transition Zone. (No. 1403.) 



Grossularia Roezli (Regel) Cov. & Britt. Frequent in various situations in the 

 Upper Transition and in the lower part of the Canadian Zone. (No. 1271.) 



Grossularia amara (McClatchie) Cov. & Britt. Ranging a short distance up into 

 the pine belt. Frequent in shaded places in the Upper Chaparral Belt. 



(To be continued.) 



