320 BOTANICAL GAZETTE [april 



Torr. Bot. Club 27:250. pi. g.fig. 6. 1900; Abrams, Fl. Los Angeles 

 suppl. ed. 102. 191 1. — S. integrifolia var. leucodendroides Rowl., I.e. 

 sphalmate in textu. — S. argophylla RowL, I.e., pro parte. — S. 

 exigua var. virens Row!., I.e. 256, pro parte. — S. sessilijolia East- 

 wood, Handb. Trees Calif. 37. 1905, pro parte; Britton and Shafer, 

 N. ' Am. Trees 196. 1908, pro parte; Jepson in Mem. Univ. 

 Calif. 2 : 178 (Silva Calif.). 1910, pro parte.— 5. macrostachya Abrams, 

 Fl. I.e. loi, non Nutt. — Rowlee cites 3 specimens from southern 

 California under his variety, namely Parish's nos. 2134, 2040, and 

 640. The last number is quoted by him also under his S. argo- 

 phylla. It belongs to var. leucodendroides. No. 2134 represents 

 an early flowering state of the male plant with small leaves and 

 short peduncles of the catkins which measure up to 2 : o . 9 cm. The 

 bracts are almost glabrate and often somewhat denticulate at apex, 

 a fact we may also observe in other forms of S. sessilijolia. No. 

 2040, in my opinion, can be regarded as the typical var. leucoden- 

 droides, which seems to differ from var. Hindsiana chiefly in its 

 comparatively longer and broader, very often distinctly denticulate 

 leaves (with fine distant teeth), measuring usually from 7:1.2 to 

 13:1.8-2 cm. (in var. Hindsiana the corresponding entire leaves 

 are about 3-10 cm. long and 3-10 mm. wide, while in the typical 

 sessilijolia they measure from 5:0.8-1 to 8:3 cm., being distinctly 

 denticulate with fine linear teeth), and by its stigmas, which usually 

 are almost sessile and somewhat shorter and broader than in var. 

 typica or var. Hindsiana. Some plants look almost like hybrids 

 with 5. Parishiana or the form of S. exigua from southern California. 

 I can but repeat that a proper understanding of all these forms 

 can only be gained by a careful study of them in the field. See also 

 my remarks under 5. Parishiana and S. argophylla. 



I give an enumeration of the specimens I am inclined to refer to 

 var. leucodendroides, and I should be glad to receive some informa- 

 tion by collectors who visit these locahties as to the different forms 

 of willows growing together there. 



Specimens examined. — San Diego County: Santa Ysabel Creek, May 

 1893, R. D. Alderson (no. 700, f. ; Cor. ; ovariis parce sericeis; cited by Rowlee 

 under S. exigua virens); Mountain Spring, May 10, 1894, E. A. Mearns (no. 



