Salix 



Salicaceae 



363 



50 



Map 747 



50 



Map 748 



Salix tristis Ait. 



50 



Map 749 



Salix Bebbiana Sar 



9- 



10. Salix petiolaris J. E. Smith. Map 745. This is an infrequent shrub 

 4-7 feet high, and found mostly in marshy and mucky land in the lake area. 

 The species is variable and I have two named varieties from the state but 

 I do not regard them as of taxonomic value and do not report them. I feel 

 that of the named variations too many are ecological forms. 



N. B. to N. Dak. and Man., southw. to N. J. and Tenn. 



11. Salix sericea Marsh.* Silky Willow. Map 746. Infrequent to 

 frequent throughout the state except in the northwestern part from which 

 there are no specimens. It is generally found in wet habitats although I 

 have a few specimens collected from moist, sandy habitats. 



N. B. and N. S. to Mich., southw. to N. C. 



12. Salix humilis Marsh. Prairie Willow. Map 747. This is a low, 

 bushy species that grows mostly in dry, sandy habitats, usually in prairies 

 or in similar places. It is frequent in our western prairie area, becoming 

 local in northern and southern Indiana. 



Newf. to Minn., southw. to N. C, Tenn., and Kans. 



13. Salix tristis Ait. Dwarf Pussy Willow. Map 748. This is a small 

 shrubby willow with a habit and habitat similar to the preceding species. 

 It also has nearly the same distribution but is much less frequent and, in 

 fact, as I understand the plant, it would be restricted to our western prairie 

 area. Since almost all of my specimens were named by C. R. Ball, I am 

 using his determinations to show the distribution in Indiana. 



After studying my specimens carefully and noting the habitats from 

 which they came, I have come to the conclusion that this species is merely 

 an ecological form of the preceding species. Griggs and Schaffner both 

 regard it as a variety of the preceding. This and the preceding species are 

 most common in White County and I have seen them growing side by side 



* After the Flora was in page proof C. R. Ball wrote me that a restudy of my 

 specimens of willows shows that Salix subsericea (Anders.) Schneid. (Rhodora 11: 12. 

 1909) occurs in Indiana in Allen, Elkhart, Kosciusko, Lake, La Porte, and Starke 

 Counties. 



