112 I. M. JOHNSTON 



Arctostaphylos patula Greene. Dry ground under the pines in the upper parts 

 of the Transition Zone and in the Canadian Zone. The range of this species 

 coincides almost exactly with that of Castanopsis. (Nos. 1540, 1580.) 



Arctostaphylos pungens H. B. K. We know of two large colonies of this species 

 in the San Antonio Mts. both of which extend a short way into the pine belt. 

 One colony is on the Baldy Trail just above Bear Flats, 5700-6500 ft. alt., the 

 other colony is on the south spur of Cucamonga Peak above what is known as 

 Manzanita Flats, alt. 6200-6700 ft. This species is recognized readily by its 

 very dark, mahogany-colored bark. (No. 1468.) 



PRIMTJLACEjE 



Dodecatheon Jeffrey! Van Houtte var. redolens Hall. One of the interesting dis- 

 coveries in a small marsh which is located in a side canon of Prairie Fork. 

 The marsh has rather a steep pitch, and as a result there are several well de- 

 fined drainage channels in which the water comes nearer to the surface and 

 the dense growth of fireweed and grasses is broken. In these mossy, water- 

 saturated lanes this Dodecatheon grows. With it are Carexaureacelsa, C.sub- 

 fusca, Juncus Mertensianus, Sisyrinchium oreophilum and Trifolium monan- 

 thum Grantianum. The plant was devoid of any odor. The mouth of the 

 side canon in which the marsh is located is marked by a large, red, U. S. F. S. 

 tool-box. The marsh is at 7000 ft. alt. in the Upper Transition Zone. (Nos. 

 1648, 2100.) 



GENTIANACE^E 



Frasera neglecta Hall. The type of this species was collected by Dr. Hall (No. 

 1495) at the head of Swartout Canon, San Antonio Mts., 6900 ft. alt. 



APOCYNACEiE 



Apocynum cannabinum L. Occasional in moist ground in the Transition Zone. 



(No. 1661.) 

 Cycladenia humilis Benth. Occasional on dry exposed slopes on all the peaks. 



Upper Transition and the lower part of the Canadian Zone. Reaching its 



maximum altitude at 9000 ft. (Devils Backbone). Always found in small 



colonies. (Nos. 1428, 1431, 1550.) 



ASCLEPIADACE.E 



Asclepias eriocarpa Benth. A few plants at 7000 ft. alt. on a dry sunny canon 



side, Upper Transition Zone, in San Antonio Canon. 

 Asclepias calif or nica Greene. Occasional in dry ground under the pines in the 



Lower Transition Zone. (No. 1266.) 



cuscutace^: 



Cuscula calif or nica Choisy. Not uncommon on Eriogonum and Chrysothamnus. 

 Seen as high as 8000 ft. (No. 1686.) 



