Report of the State Botanist. 19 



Rosa humilis Marsh. 

 This rose, which had been previously united with R. lucida, is 

 considered a distinct species in the last edition of Gray's Manual. 

 Its most prominent distinguishing features are its shorter stems, 

 straight slender spines, narrow stipules and lobed outer sepals. 

 These characters, however, are somewhat variable, so that individ- 

 uals occur, which connect the two in such a way as to show that 

 they are not very sharph^ limited. This is the most common species 

 about Albany. It is abundant on Mount Defiance, near Ticon- 

 deroga, and is quite variable there. One noteworthy form has 

 the spines nearly wanting, the leaflets numerous and small, gen- 

 erally eight or nine lines long, and the pedicels and calyx tube 

 as glabrous as in E. hlanda. From B. hlanda it may be sepa- 

 rated l3y the presence of an occasional spine and by the decidu- 

 ous sepals. Can it be a cross between R. hlanda and R. humilis, 

 both of which occur in this locality ? R. humilis appears to be 

 equally at home on rocky, clayey or sandy soil. It is abundant 

 in the eastern part of Long Island. 



Rosa Sayi :Sch%o. 



I i-efer to this species, s])ecimens collected near Westport, Essex 

 county, in June. The essential characters of the species are 

 shown, but in some cases only partially or slightly. The serru- 

 late teeth of the leaflets are not always present, and their resin- 

 ous-puberulent character is sometimes very slight. The stems 

 are always very prickly, and often the branches also. The 

 prickles are sometimes intermingled with straight, slender spines, 

 and the sti|)ules, which are either narrow or dilated, are pretty 

 constantly and distinctly glandular-ciliate. The leaflets are more 

 rounded or obtuse at the base than in R. hlanda, from which it is 

 se])arated by the characters just mentioned, although its variation 

 from typical R. Sayi seems to be in the direction of R. hlanda. 

 In the Manual the species is credited from Northern Michigan 

 and Wisconsin to Minnesota and Colorado. Possibly it nmy have 

 been introduced into our locality from the west, but it is well 

 established both north and west from Wcst])ort, and has been 

 here many years. 



Rosa Engelmanni Watnon. 



P>uiting specimens of a rose very similar to the preceding 

 species were collected several years ago at the base of Mount 



