334 



IRIDACEAE 



Sisyrinchium 



50 



Map 685 



Sisyrinchium albidum Raf, 



~~5o 



Map 686 



Sisyrinchium graminoides Bic knell 



woodland that have a sandy soil. I found it well established over an area 

 of about 2 acres south of Battle Ground, Tippecanoe County, where it was 

 growing in dry, gravelly soil in open woodland. 



Nat. of Asia. ; Conn, to Kans., southw. to Ga. and Tex. 



1286. SISYRINCHIUM L. Blue-eyed-grass 



Spathes sessile and terminal. 



Spathes 2, with a single, outer, leaflike bract 1. S. albidum. 



Spathes solitary. 



Outer, elongate bract with margins free to the base; capsules pale. (See excluded 



species no. 153, p. 1037.) S. campestre. 



Outer bract with the margins united above the base. 



Pedicels loosely spreading, much exceeding the inner bract; capsules 2-4 mm 



long. (See excluded species no. 154, p. 1037.) S. mucronatum. 



Pedicels suberect, scarcely exceeding the inner bract; capsules 4-6 mm long. .. . 



2. S. angustifolium. 



Spathes peduncled from the axil of the leaflike bract. 



Inner bract of spathe 1.5-3 cm long; stems broadly winged 3. S. graminoides. 



Inner bract of spathe 1-1.5 cm long; stems slender and narrowly margined; capsules 

 beaked or beakless 4. S. atlanticum. 



1 . Sisyrinchium albidum Raf. Map 685. This species prefers a moist or 

 dry, sandy soil. It is infrequent on sandy, white and black oak ridges and 

 most frequent and abundant in moist, sandy soil of prairie habitats. It is 

 also sometimes found in marshes. It is infrequent throughout the lake 

 area, probably absent or rare in some of the counties of the Tipton Till 

 Plain, and again appears sparingly in the southern counties. Most of our 

 species seem to thrive best in full sunshine and are usually found in slightly 

 acid soil. Most of our reports of Sisyrinchium angustifolium which were 

 made before 1908 should, no doubt, be referred to this species. 



Ont. to Wis., southw. to N. C, Ala., and La. 



2. Sisyrinchium angustifolium Mill. This species was reported from 

 many parts of the state by early authors before our manuals recognized 

 Sisyrinchium albidum. Probably most of these reports should be referred 



