160 JOURNAL OF THE ARNOLD ARBORETUM [vol. r 



Of the western form (S. syrticola Fern.) I have seen specimens from 



western Ontario (Cockburne IsL, Prince Edward District), Wisconsin 



(Manitowoc County), Michigan (Allegan, Huron, Berrien, Lake, and 



Porter Counties), Illinois (Cook County), Ohio (Erie County), Pcnnsyl- 



^ vania (Erie County). 



6. S. commutata Bebb in Bot. Gaz. xiir. 110 (1888). — ? S. livida a. ros- 

 trafa a. laiiata Dippel, Handb. Laubh. ii. %5Q (1892), — Coville in Proc. 

 Wash. Acad. Sci. iii. 317, t. 37 (1901), — Piper in Contrib. U.S. Nat. 

 Herb. XI. 21G (FI. Wash.) (1906). — I?all apud Piper & Beattie, Fl. N.W. 

 Coast, 116 (1915). — Henry, Fl. S. Brit. CoL 100 (1915), excl. synon. 

 Rydberg, FI. Rocky Mts. 194 (1917). — S. Barclayi Jones, Will. Fam. 16 

 (1908), pro parte, non Andcrsson. — In 1901, Coville explained tlie history 

 of this species. It was described by Bebb from specimens collected by 

 Cusick on the Eagle Creek Mountains, near Snake River in Oregon, which 

 I have seen in the herbarium of the Field Museum. As type must be taken 

 Cusick's No. 820 (sheet 7751 of Herb. Bebb. in C.).i Bebb, then, distin- 

 guished S. commvtata from his >S. conjunda (see above on p. 151), but he 

 did not compare both sufficiently with S. Barclayi. Coville was the first 

 to separate correctly this and S, commutata, 



I liave seen specimens of the typical form from Oregon (Umatilla, Wal- 

 lowa, Union, Klamath and Grant Counties), Wash'ngton (Pierce, Mason, 

 King, Chelan, and Okanegan Counties), Montana (Glacier Nat. Park and 

 Teton County), British Columbia (Kootenay, Yale, New Westminster, and 

 Cassiar Districts), Alberta (Rocky Mountain District) and Alaska (from 

 White Pass and Lake Atlin to Prince William Sound and Kukak Bay), 

 Tliere are also some siDccimens of J. N. Rose's (No. 170 and 404, fr. C.) from 

 the Yellowstone Park which may belong to this species, which pro])al)ly 

 also occurs in northern Nevada (Pine Forest Lake, Griffith & Morris, No. 

 S-^G, Herb. Brooklyn Bot. Gard.), and in northern California (Modoc 

 County, Warner Mts., Austin & Bruce, No. 33, m., Cal., filamentis glabris, 

 sec later untler S. Eastwoodiac) , 



Bebb made 3 varieties. First S, commutata var. sericea, of which the tyi^e 

 came from Mt. Hood in Oregon where it was collected by Howell and also 

 by Henderson. This is a form with a very dense white tumcntose pubescence 

 of the leaves, and apparently connected with the tyi)c by many intermediate 



1 On this sheet there i« the following extract of a letter of the collector which seems worth 

 quoting: *'8^G. This I saw in great abundance in the high Mts. It is commonly 3°-4°, but in 

 sheltered localities is rarely 8' or 10' hi length and is often but a few inches. Many spec, were 

 seen that 1 could not decide whether they were of this or tlie preceding (S. Barclayi). I have 

 enclosed such under 1304 b-c, and e. Nothing but fruit could l)e had and often not that, and 

 perliaps the matter cannot be definitely settled till good spec, of all can be had. MC) must 

 be a local form. When sent to Watson some years ago he said ** I cannot match it, and unless 

 you have it from Howell or Suksdorf we may say that it does not extend farther west than our 

 Hlue Mountains. In them it seems to be limited to a small district. East of them is a range 

 (near Snake River) known as Eagle Creek (on the South) or Wallowa Mts. (on the n.) very 

 high and rugged, a part of the Idaho system rather than the Blue Mts. In these I find it in 

 great abundance, as no doubt it is on the other side of the Snake River. If it extended to 

 the Rocky Mts. some one would certainly have found it ere this." 



