' 



1 



t 



i- 



t 



342 Bickxell: Studies in Sisyrinchium 



■ 



Wisconsin : Madison, Trelease. 



Minnesota: Chicago Co., Taylor; Goodhue Co., Sandberg; 

 Hennepin Co., many collectors; Meeker Co., Frost; McLeod 

 Co., McElligott; Nicollet Co., Ballard; Ramsey Co., Sheldon; 

 Swift Co., Payne ; Waseca Co., Taylor. 



North Dakota: Geyer (1839). 



South Dakota: Clay Co., Geyer; Lincoln Co., Redfield. 



Nebraska: Lancaster Co., Webber ; Saline Co., Siegreist, 

 Hayden (1853). 



Jackson Co., Bush ; J 



Co., Englemann (1862). 



Kansas : Riley Co., Bassler, Norton. 

 Arkansas : Nuttall. 

 Oklahoma : Waugh. 

 New Mexico: Hermit's Peak, Snow. 

 Illinois : Menard Co., Hall. 



Iowa : Fayette Co., Fink ; Pottawattamie Co., Hayden ; Story 

 Co., Hitchcock; Winneshiek Co., Collett. 

 Louisiana: Natchitoches Co., Hale. 



Nearly allied to 5. vmcronatum Michx. certain forms of the 

 two plants even appearing scarcely different — always a logical ex- 

 pectation from conditions of close relationship between plants, how- 

 ever distinct. Notwithstanding such dubious forms, the normal 

 development of the two plants takes place along obviously ditferent 

 lines. In its tj-pical state .S. cauipestre is mostly a more glaucous 

 plant than S. vmcronatum, of stiffer habit, with smooth-edged stem 

 and leaves, and paler blue or frequently white flowers on rather 

 less exserted pedicels ; the spathe is relatively larger with stiffer 

 primary bract, and though often of a dull pink -purple shade never 

 develops the bright red-purple color so conspicuous in typical 5. 

 inucronatiim ; its bracts are also usually less membranous than i» 

 5. vmcronatum, the outer one scarcely if at all united-clasping ^^ 

 the base permitting a more abrupt protrusion of the inner one 

 which tends to be more broadly hyaline along the margins. 



The close relationship of the species to S. miicronatum would 

 lead to an expectation of somewhat parallel lines of variation m 

 the two plants. These, indeed, prove to exist. Furthermore, S. 

 campcstre is nearly related to the twln-soathed snecies. 5. albidmn 



