< b STOCK RANGES OF NORTHWESTERN CALIFORNIA. 



Link, on Osmorrlxiza brevistylis; Puccinia wyethice Peek., on WyetJiia 

 angustifolia; Phragmidium subcorticium (Selirank.) Wint., on Rosa 

 gymnocarpaj Phragmidium rubi-idmi (DC) Karst., on Rubus 

 parviflorus; Sphoe/rotheca humuli (DC.) Burrill, on Collomia hetero- 

 phyUa; Synchytrium pluriannulat/wm Farlow, on Sanicula menziesii; 

 Triphragmium echinatum Lev., on Selinum pacificum; Uromyces 

 aterrimus D. & H., on Allium unifolium; Uromyces hyperici (Schw.) 

 Curt., on Hypericum anagalloidesj Uredo arbuti D. & H., on Rhodo- 

 dendron calif ornicum. 



PHYTO GRAPHIC NOTES. 



The southern portion of the region under investigation is included 

 by Dr. C. Hart Merriam in his Transition Zone. The Canadian Zone 

 covers a large part of Del Norte and northern Humboldt counties 

 and the Hndsonian Zone occupies the highest mountain summits. 

 Our general collections have not yet been completely worked up, so 

 that we can not give adequate lists of the plants by which each of 

 these zones is characterized. 



In general features the flora over the largest portion of this region 

 differs little from that of the region immediately north of San Fran- 

 cisco Bay. Some species of the latter area do not extend as far north 

 as the region under investigation, but in their stead occur species 

 characteristic of a more northerly climate. Sequoia sempervirens is 

 the most characteristic tree, here reaching its greatest development 

 and occurring throughout the area. Immediately along the coast 

 occur other coniferous trees. In Mendocino County Pinus muricata 

 and P. contorta are the prevalent species, and a few specimens of 

 Abies grandis occur. The pines were not observed along the coast 

 of Humboldt and Del Norte counties being replaced by Abies gran- 

 dis, Picea sitehensis, and Tsuga mertensiana. 



The highest summits of the South Fork Mountains, which separate 

 Humboldt County from Trinity County, are characterized by a highly 

 interesting flora, showing a close connection with that of the Northern 

 Sierra Nevada, with which it is topographically connected by the 

 Salmon and Scott ranges and Mount Shasta. Our collections from 

 this portion of the region have not yet been completely worked over, 

 but they contain such interesting Sierran species as Arctostaphylos 

 nevadensis, Ccdtlia biflora, Dicentra uniflora, Kalmia glauca micro- 

 phylla, Quercus chrysolepis vacciniifolia, Pentstemon neibberryi, Ribes 

 cereum, Sarcodes sanguinea, Spraguea umbellota. Vaccinium arbus- 

 cula, and Viola bland a. 



But little systematic work has been done on the flora of this region. 

 Collections have been made by H. N. Bolander, C. G. Pringle, Volney 

 Rattan. C. C. Marshall, V. K. Chesnut, Elmer R. Drew, W. C. Bias- 

 dale. M. A. Howe. J. P. Tracy, H. P. Chandler, Miss Alice Eastwood, 

 and the writer. Bolander's and some of Rattan's notes are recorded 



