OCT., 1809.] PLANTS. 141 



Sisyrinchium bellum Watson. Blue-eyi'd Grass. 



Fairly coiiiiiioii in tlie Transition zone near Wayon ('aini». 

 Corallorhiza bigelovi Watson. 



Xot nnconmion in the woods near Wajion Camp. (Identified by I'ro- 

 fessor (rreene.) 

 Habenaria leucostachys (Lindl.) Watson. 



Common in the marsb at Wagon Oanip. (Identined by Professor 

 Greene.) 

 Habenaria unalaschensis Watson. 



A boreal species, fairly common in the marsh near Wagon Camp, 

 growing with the last. (Identified by Professor Greene.) 

 Populus trichocarpa T. & G. Western Balsam Poplar. 



Common in the upper Sacramento Canyon near Sisson, and less so 

 along Shasta River at the south end of Shasta Valley. 

 Salix lasiandra Bentham. Black Willow. 



Abundant in cool moist ])laces about Sisson. (Identilled by Miss 

 Eastwood.) 

 Salix nuttalli Sargent. Nnttall Willow. 



Common in moist places in canyons of the Canadian zone ami near 

 Wagcni Camp. (Identified by F. V. Coville.) 

 Salix sitchensis Sanson. Sitka Willow. 



Common in canyons in the Canadian zone. Found in Mud Creek 

 Canyon near the mouth of Clear Creek. (Identified by F. V. Coville.) 

 Alnus rhombifolia Xutt. White Tree Alder. 



Observed only on Shasta River in the southern part of Shasta 

 Valley, where its zone position appears to be Upper Sonoran. Shasta 

 Valley is one belt lower than the rest of the region about Shasta and 

 contains a dilute tongue of Upper Sonoran species that come in from 

 the north b}' way of Klamath Kiver Valley. 

 Alnus sinuata (Regel) Rydb. Alder. 



Common in moist places in the canyons of the Canadian zone. In 

 Mud Creek Canyon noted as high as 0,700 feet. Found also near 

 Wagon Camp. (Identified by F. V. Coville.) 

 Alnus tenuifolia Xutt. Paperleaf Alder. 



[=A. incana var. rirescenH Wats]. 



A Transition zone species common along streams in the neighbor- 

 hood of Sisson Tavern and along the east base of Scott Mountains. 

 (Identified by F. V. Coville.) 

 Betula occidentalis Hooker. Birch. 



Fairly common along Shasta River at the south end of Shasta 

 Valley. ]S[ot observed elsewhere. 

 Corylus rostrata californica A. DC. 



Fairly common in the Transition zone in Squaw Creek Valley near 

 McCloud Mill, and probably elsewhere at the base of the mo'2'itain. 



