IRIDACEAE (lUlS FAMILY) 



503 



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

 green or straw-color, the outer bract 3.5-8 cm. long, the inner 1.5-3.6 cm. 

 long ; capsule whitish-green to straw-color. — Gasp6 Penins. , Que. ; Mich. ; Minn. ; 

 Rocky Mts. June, July. 



f/^ S. iNTEKjiEuiuM Bicknell appears to include inconstant and not very clearly 

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

 S. gramineiim. 



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

 stems flezuous, 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. arenfcola 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. strlctum Bicknell. Bright green, 

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

 wide, slightly exceeding the scarcely broader 

 leaves ; bracteal Zea/ 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. 

 L^ 11. S. gramineum Curtis. Loosely tufted, 

 bright green or glaucescent, 1-5 dm. high, 

 the ascending flexuous or even geniculate 

 broad-winged flat stems 2-0 mm. wide, usu- 

 ally exceeding the grass-like leaves ; bracteal _ 

 leai 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. atUnticum 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, 3-4.5 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 capsules 

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

 609. 



607. S. gramineum 

 xVa. 



60S. 8. atlantioum 

 xVs. 



609. S. apiculatum 

 xVs- 



