3IO BOTANICAL GAZETTE [april 



University. I wish to acknowledge here his courteous assistance, 

 and to give the same acknowledgment to the curators of the 

 Herbarium of the Geological Survey of Canada at Ottawa, of the 

 Gray Herbarium, of the Herbarium of the Royal Gardens at Kew, 

 of the Missouri Botanical Garden, of the New York Botanical 

 Garden, of Stanford University, and of the U.S. National Her- 

 barium for the loan of material representing the forms under 

 discussion. For further material I am indebted to Miss Alice 

 East-wood, San Francisco, California, Professor J. K. Henry, Van- 

 couver, B.C., Professor W. L. Jepson, Berkeley, California, Mr. I. 

 M. Johnston, Upland, California, and Mr. J. C. Nelson, Salem, 

 Oregon. I have also been able to go over the material of the Bebb 

 Herbarium at the Field Museum, and am under obligation to Dr. 

 C. F. MiLLSPAUGH for what he has done to further my studies. 



Sect. LoNGiFOLiAE Audcrssou in Ofv. K. Vet.-Akad. Forh. 15: 

 116. 1858; for further Kterature see Schneider in BoT. Gaz. 65: 22. 

 1 91 8. — Frutices mediocres (rariter parvi) vel alti arboresque, ramis 

 densis caespitosis, cortice cinereo vel pl.m. brunnescente, ramulis 

 elongatis virgatis brunneis vel purpureo-brunneis interdum niti- 

 dulis. Folia linearia, lanceolata, vel elliptico-oblonga, denticulata 

 vel integerrima, nervis lateralibus satis distantibus, petiolis vulgo 

 satis brevibus, stipulis saepe deficientibus vulgo parvis lanceolatis 

 denticulatis. Amenta serotina vel primaria coetanea, pl.m. 

 pedunculata vel ramos laterales normaliter foliatos saepe satis 

 longos terminantia, singula vel ad 2-3 aggregata, pl.m. cylindrica, 

 rarius ovalia; bracteae conco lores, flavescentes, deciduae; flores 

 masculi vulgo biglandulosi, diandri, filamentis liberis pilosis; 

 feminei fere semper uniglandulosi, stylis nullis vel brevibus, stig- 

 matibus bifidis laciniis linearibus vel brevibus; ovaria fructusve 

 pilosi vel glabri, subsessiles vel pedicello glandulam usque duplo 

 (rarius magis) superante instructi. 



As already stated, the Longifoliae is an entirely American 

 group, of which S. taxifolia var. microphylla ranges as far south as 

 Guatemala, while a form of S. longifolia almost reaches the Arctic 

 Circle in the Yukon Territory. From west to east the range of the 

 group extends from the shores of the Pacific to those of the Atlantic, 

 but it is not represented in southeastern United States from central 



