IRIDACEAE (IIUS FAMILY) 



303 



7. S. montanum Greene. Similar, pale green or glaucescent ; spathes pale 

 green or straw-color, the outer bract 8.5-8 cm. long, the inner 1.5-3.5 cm. 

 long ; capsule whitish-green to straw-color. Gaspe" Penins., Que. ; Mich. ; Minn. ; 

 Rocky Mts. June, July. 



S. INTERMEDIUM Bicknell appears to include inconstant and not very clearly 

 marked forms intermediate between S. mucronatum, S. angustifolium, and 

 S. gramineum. 



8. S. FarwSllii Bicknell. Loosely tufted, from a fibrous-sheathed base; 

 stems flexuous, branched, slightly glaucous, 2-3 dm. high, 1-2 mm. broad, 

 winged, twice exceeding the slightly broader leaves; bracteal leaf loosely 

 clasping, shorter than the (4-11 cm. long) curved slender peduncles; spathes 

 1.7-2 dm. long, the bracts subequal, yellowish-green, thin and membranous; 

 flowers pale blue, on flexuous exserted pedicels. Local, s. e. Mich. 



9. S. arenicola Bicknell. Similar, but usually blackening in drying, and 



rather stouter, the violet flowers on erect or 

 only slightly curved pedicels. Sandy soil, 

 near the coast, Mass, to N. J. 



10. S. strictum Bicknell. Bright green, 

 3 dm. high; the winged stems 1.5-2 mm. 

 wide, slightly exceeding the scarcely broader 

 leaves ; bracteal leaf about equaling the strict 

 peduncles, 6-9 cm. long ; spathes 1.5-2 cm. 

 long, pale green, tinged with purple, the 

 bracts subequal, or the inner longer ; pedi- 

 cels strict, barely exserted ; flowers violet. 

 Montcalm Co., Mich. 



11. S. gramineum Curtis. Loosely tufted, 

 bright green or glaucescent, 1-6 dm. high, 

 the ascending flexuous or even geniculate 

 broad-winged flat stems 2-6 mm. wide, usu- 

 ally exceeding the grass-like leaves ; bracteal 

 leaf broad, usually shorter than the flat 

 peduncles ; spathes green, erect, the bracts 

 subequal, 1.5-2 cm. long, or 



the outer somewhat elon- 

 gated ; flowers blue ; cap- 

 sules subglobose, 4-6 mm. 

 high. (S. anceps Man. 

 ed. 6 ; S. graminoides Bick- 

 nell.) Wet meadows and 

 damp woods, N. H. to Minn., 

 and southw. Apr.-June. 

 FIG. 607. 



12. S. atlanticum Bick- 

 nell. Loosely tufted, pale 



and glaucous, 2-7 dm. high ; stems wiry and slender, flexuous 

 or geniculate, narrowly margined, 1-3 mm. wide, much exceed- 

 ing the narrow leaves ; bracteal leaf usually shorter than the 

 slender peduncles ; spathes often oblique and tinged with pink, 

 the subequal bracts thin, 1-1.5 cm. long, the outer acute, the 

 inner obtuse; pedicels erect, scarcely exserted; perianth violet; 

 capsules slightly higher than broad, 3-4.6 mm. high. Damp 

 soil, Me. to Vt. and Fla., mostly on the coastal plain. FIG. 

 608. 



13. S. apiculatum Bicknell. Similar; stems 3 dm. high, 

 nearly or quite twice as long as the narrowly linear grass-like basal leaves ; 

 the pedicels (1-1.8 cm. long) distinctly exserted, and the rather smaller capsule* 

 tipped by stout short beaks. Lake shores, etc. , Muskegon Co. , Mich. FIG. 

 609. 



607. 8. gramineum 



608. 8. atlanticum 



X'/3- 



609. S. apiculatum 



