Jones: Flora of Illinois, 34. Iridaceae 97 



34. Iridaceae Lindl. — Iris Family 



1. Leaves more than 1 cm. wide; flowers large; plants with rhizomes. 



2. Flowers blue or reddish; seeds flattened or angular; style-branches broad, petal-like, 

 opposite the anthers 1 . Iris 



2. Flowers orange, mottled with purple; seeds globose, black, shining, succulent; style- 

 branches filiform, alternate with the anthers 2. Belamcanda 



I. Leaves less than 7 mm. wide; flowers small; plants without rhizomes....3. Sis^rinchium 



1. Iris L. — Iris 



1. Flowers blue, variegated with yiellow and white. 



2. Leaves somewhat glaucous; sepals 5-8 cm. long; capsule obscurely 3- 

 lobed, L5 cm. thick; ditches, wet meadows, moist woods, banks of 

 streams, ponds, and sloughs, common. May-June. [/. versicolor sensu 

 auth. ex p., non L.} /. shrevei Small 



2. Leaves green, not glaucous; sepals 8-10 cm. long; capsule strongly 6- 

 angled, 2 cm. thick; meadows, swamps, and borders of woods, s. 111. 

 May-June. [/. foliosa Mack. 8c Bush; /. hexagona sensu auth., non 

 Walt.] /. brevicaulis Raf. 



L Flowers dull reddish brown, variegated with blue and green; leaves pale 

 green and somewhat glaucous; sepals 3-5 cm. long; swamps, s. 111., rare. 

 May 7. fuha Ker 



2. Belamcanda Adans. 



(Cemmingia Fabr.) 



B. chinensh (L.) DC. Blackberry-lily. Roadsides and banks, chiefly s. III., 

 escaped from cult.; native of Asia. June- July. 



3. SiSYRlNCHlUM L. — Blue-eyed grass 



\. Spathes and flowers arising directly from apex of stem; leaves and stem 

 glaucous, 1-2 mm. broad, the margins entire. 



2. Spathes usually 2, with a single outer leaf-like bract; margins of the outer 

 bract free to the base; perianth usually white, or sometimes purple; 

 capsules 3-4 mm. long, straw-colored; meadows and prairies, common. 

 May-June S. albidum Raf. 



2. Spathe solitary; outer bract with the edges united 3-5 mm. above the 



base; perianth bluish purple; capsules 4-6 mm. long, dark brown; 

 prairies, n. e. 111. May-June S. augustifoliiim Mill. 



1. Spathes peduncled from the axil of a leaf-like bract; leaves and stems dark 

 green, glossy, 2-6 mm. broad, the margins usually minutely serrulate; 

 perianth bluish purple; capsules 4-6 mm. long. 



3. Leaves and stems dark green, not glaucous; stem broadly winged, almost 



straight; inner bract of spathe 1.5-3 cm. long; moist meadows. May- 

 June. \_S. gramineiim Curtis, not Lam.} S. graminoides Bickn. 



3. Leaves and stems glaucous; stem narrowly margined, curved or flexuous; 

 inner bract of spathe 1-1.5 cm. long; sandy soil, local; Kankakee Co., 

 R. A. Schneider. May-June S. atlanticum Bickn. 



