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JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



measuring from 2:0.3 to 5:0.8 cm., bearing the same i:)ul)cscencc as the 

 typical suhcocndca. The male aments are coetaneous, up to ^ cm. long and 

 1 cm. tliickj with very short leafy peduncles. This form needs further 

 observation; it somCAvhat resembles the forms with pubescent branchlets 

 mentioned under S. Drummondiana but the twigs bear only a few scattered 

 hairs at their tips. 



8. S. bella Piper in Bull. Torr. Bot. CI. xxvn. 309 (1900). — Rydberg, 

 Fl. Rocky Mis. 190 (1917). — S. glaucops ghdncscens Jones, Willow Fam. 

 10 (1908), quoad syn., non Andersson. — The type of this species came from 

 Whitman County, Washington, 6 miles east of Pidhuan, near Garrison, 

 wliere it was collected by L. F. TTenderson in 1895 and 1890. I have seen 

 tlie type (Herb. Pu.) and Piper's No. 29^22 wdiich is marked in Herb. G. 

 "from type tree." *S. bclla is certainly a beautiful Willow but its relations to 

 S. subcocndea and S. pcllifa are not yet fully understood. I have pointed 

 out the differences in the key. Piper states that tlie branches are very 

 brittle, wliile in S. siihcoendea he does not note this fact. According to llie 

 information which Professor J. G. Jack has given me, it seems that all the 

 species of this group have brittle jointed branches. Piper furthern:or3 said 

 in the note to his description that S. hclla belongs to " the obscure S. pcUita 

 group," and that *'its relationship is with S. Candida'" This species, how- 

 ever, belongs to a different section. 



I add an enumeration of the specimens of S. hella which I have seen. 

 Among them are some in which the lower (first) leaves are not distinguish- 

 able from those of S. siihcocridca, and bear the pubescence characteristic of 

 that spr'cies, while the upper (later) leaves are distinc^tly covered witli the 

 less adpressed, not so lustrous silvery pubescence of S. bdla. After all I am 

 nut sure if S. bcUa rei)resents a variety of the other species. It is true that 

 the pubescence of the lower surface of the leaves of S. bclla is not unlike that 

 of S, pcllita, but in this species the lower leaves usually become more gla- 

 brous, glaucous and reticulate. To detect good characters in the male and 

 female flowers of these very closely related species it would need an Investi- 

 gation of a series of well collected specimens accompanied, in order to be sure 

 of their identity, by mature leaves of the same plant. Of S. pcllita I have 

 not yet seen uuile flowers, and perfectly ripe fruits of all the species are rare 

 in herbaria because the s])ecimcns were mostly collected before the fruits 

 were mature. 



SpEcniEXS ExAMi.shu: Eastekx Washingtox. Whitman County: near Gar- 

 rison, August 18, October U, 1895, April 4, m., May 5, f., 1S9G, Z. F, Ilcmler.son (type 

 material, Pu.); April 150, July ^2, 1899, C, V. Piper (No. SO'^^^ purtim, f., st.; A., G.); 

 same place, August 31, 1918, J. G. Jack (No, 12^27, st.; A.; "bushes 10-12 tVcl high") 

 (i Tuilcs vixsl of Pullninu, April 30, July 2, 1901, C. V. Piper (No. 2922 partim, f., 

 m., St.; A., W.); April 13, September, 1901, C. V, Piper (No. 3590, m., f., st.; A. G., 

 W.); S]>()kaue, October 1, 1900, C. F. Piper (No. 3317, st.; G.; forma quamvis in- 

 certa folils inferioribus satis late obovatis, ad 0:2.5 cm. magnis, summis satis 



typicis.) 



NoRTHWESTERX Idaho. Latah County: Jansville, July, 1898, C. V. Piper 



