IRIDACEAE (iris FAMILY) 



303 



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

 green or straw-color, the outer bract 3.5-8 cm. lonjr, the inner 1.5-3.0 r-... 



Gaspd Penins. , Que. ; Mich, ; Minn. ; 



long ; capsule whitish-green to straw-color. 

 Rocky Mts. June, July. 



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

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

 >S'. gramineum. ' 



8. S. Farw611ii Bickuell. Loosely tufted, from a fihrous-sheathed base • 

 stems Jlexuous, branched, slightly glaucous, 2-3 dm. hi^h, 1-2 mm broad 

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

 claspmg, shorter than the (4-11 cm. long) curved slender xteduncles ; spath/s 

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

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



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



rixtheY stouter, the violet flowers on erect or 

 only slightly curved pedicels. — ^yiwdy eoW, 

 near the coast, JMass. to N. J. 



10. S. striatum Bicknell. Bright green, 

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

 wide, slightly exceeding the scarcely broader 

 leaves ; bracteal leaf ahout 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-G 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- 

 sides subglobose, 4-(3 mm. 

 high. {8. anceps IMan. 

 ed. G ; 8. graminoides Bick- 

 nell.) — Wet meadows and 

 damp woods, N. 11. to Minn., 

 and south w. Apr. -June. 

 Fig. G07. 



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 tl;e 

 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, '6-A.^ mm. high. — Damp 

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

 608, 



13. S. apicul^ltum 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. Fio. 

 609. 



607. S. gramineum 



GOO. S. ai)Iculfltum 



1 



