3i6 BOTANICAL GAZETTE [april 



lanceolata, vulgo vix ultra 8 mm. lata vel ovaria 

 angustiora apice magis capitata (incrassata) et 



fructus magis elongati 6. S. exigiia 



Folia ramulorum fertilium pl.m. distincte denticulata, 

 vulgo cito utrinque viridescentia et glabrescentia, adulta 

 intense laete viridia et glabra (vel in var. W heeler i 

 utrinque pl.m. sericea), nervis etiam secundariis utrin- 

 que pl.m. prominulis; fructus magis elongati et rostrati; 

 amenta fructifera pl.m. laxiflora (si amenta sunt valde 

 densiflora et ovaria parce vel partim pilosa conf. etiam 

 S. melanopsidem var. Bolanderianam) . . .8. S. longifolia 

 Glandula florum masculorum tantum una ventralis (rarius 

 dorsalis minima adest); amenta feminea saltem novella 

 ovariis dense albo-sericeo-villosis subsessilibus pl.m, mi- 

 cantia; glandula satis lata; folia ramulorum fertilium pl.m. 

 linearia, 4-8 cm. longa et 1-5 mm. lata, ut in 5. longifolia 

 dentata et nervata 8c. S. longifolia var. angustissima 



Enumeratio specierum 



1. S. TAXiFOLiA Kunth in Humb. and Bonpl., Nov. Gen. PL 

 2:18. 1817; Sargent, Silva N. Am. 9:129. pi. 476. 1896; Man. 

 Trees N. Am. 175. fig. 147. 1905; Sudworth, Nomencl. Arb. Fl. 

 U.S. 123. 1897, pro parte; Britton and Shafer, N. Am. Trees 202. 

 fig. 164. 1908; for further literature and synonymy see Schneider 

 in BoT. Gaz. 65:23. 1918. — At present I have nothing to add to 

 what I have already stated {I.e.) with regard to this species and its 

 var. microphylla (Schl. and Cham.) Schn. There are several 

 forms which look rather similar to S. taxifolia, but differ in the shape 

 of the anthers and some other respects. I shall discuss them under 

 S. exigua. 



2. S. SESSiLiFOLiA Nutt. N. Am. Sylva 1:68. 1843,^ reprint 

 1852; Anders, in Ofv. K. Vet.-Akad. Forh. 15:116. 1858; in Proc. 

 Amer. Acad. 4:56 (Sal. Bor.-Am. 10). 1858; in Walp., Ann. Bot. 

 5:746. 1858, incl. var. villosa; in K. Sv. Vet.-Akad. Handl. 6:55. 

 pi. 4. fig. 36 (Monogr. Salic). 1867; in DC. Prodr. 16^:214. 1868; 



^ Nuttall's vol. I was issued in 2 parts; part i in 1842, containing pp. 1-54; 

 while part 2, pp. 57-136, including the Salices, appeared in 1843. 



