1RIDACEAE. 283 



cm. wide, green, not glaucous, the lower often 6-9 dm. long; flowers solitary in 

 the upper axils, sessile, similar to those oil. versicolor, but larger, the broader outer 

 crestless perianth segments often I dm. long and over 2.5 cm. wide, much wider 

 than the erect inner ones; perianth-tube rather longer than the ovary; capsule 

 oblong-cylindric, 6-angled, about 5 cm. long; seeds in 2 rows in each cavity. In 

 swamps, S. Car. and Fla. to Ky., Mo. and Tex. April-May. 



3. Iris Caroliniana S. Wats. Carolina Blue Flag. (I. F. f. 107 1.) 

 Rootstock stout, fleshy. Stem 6-10 dm. tall ; leaves bright green, 1.5-3 cm. wide; 

 flowers solitary or 2 or 3 together, lilac, variegated with yellow, purple and brown, 

 pedicelled ; outer perianth-segments broadly spatulate, 6-8 cm. long, with narrow 

 claws, the inner narrower and nearly erect ; perianth-tube about 1.2 cm. long 

 above the ovary ; capsule oblong, obtusely 3 -angled, 3-5 cm. long ; seeds in 1 row 

 in each cavity, 8-10 mm. broad. In swamps, S. Va. and E. N. Car. May-June. 



4. Iris Hookeri Penny. Hooker's Blue Flag. (I. F. f. 1072.) Rootstock 

 rather slender. Stems slender, terete, 2.5-5 dm. tall. Leaves mostly basal, nar- 

 rowly linear, bright green, 4-8 mm. wide ; flowers solitary or 2 together, pedi- 

 celled, the pedicels shorter than the bracts ; perianth -segments glabrous, crestless, 

 the inner ones oblanceolate, much shorter and smaller than the outer ; capsule 

 short-oblong, 2-3 cm. long, thin-walled, transversely veined, obtusely 3-lobed ; 

 seeds in 2 rows in each cavity, about 3 mm. broad. On river shores, Newf. to 

 Quebec and Me. Summer. 



5. Iris Missouriensis Nutt. Western Blue Flag. (I. F. f. 1073.) Root- 

 stock stout. Stem rather slender, terete, 1.5-6 dm. tall, 1-2-flowered ; leaves 

 mostly basal, green, sometimes purplish below, 4-8 mm. wide ; flowers pale blue 

 and variegated, pedicelled ; pedicels slender, 1-5 cm. long, usually shorter than 

 the scarious bracts ; perianth-segments glabrous, crestless, the outer ones 5-6 cm. 

 long, the inner somewhat shorter, the tube 6-8 mm. long above the ovary; capsule 

 oblong, 2.5-3 cm - l° n g> obtusely 6-angled, faintly veined. In wet soil, S. Dak. to 

 Mont., New, Colo, and Ariz. May-July. 



6. Iris prismatica Pursh. Slender Blue Flag. (I. F. f. 1074.) Root- 

 stock rather slender, tuberous-thickened. Stems slender, often flexuous, 3-9 dm. 

 tall, usually simple, bearing 2 or 3 leaves; leaves almost grass-like. 3-5 mm. wide; 

 flowers solitary or 2 together, blue, veined with yellow, slender-pedicelled; pedicels 

 commonly longer than the bracts ; outer perianth-segments 3-5 cm. long, glabrous 

 and crestless, the inner smaller and narrower, the tube 4-6 mm. long above the 

 ovary ; capsule narrowly oblong, acute at each end. sharply 3-angled, 2.5-3.5 cm. 

 long, 6-8 mm. thick ; seeds about 2 mm. broad, thick, borne in I row in each 

 cavity*. In wet grounds, N. B. to Penn. and N. Car. May-June. 



7. Iris Germanica L. Fleur-de-lis. (I. F. f. 1075.) Rootstock thick. 

 Stems stout, usually branched and several-flowered, 4-9 dm. tall, bearing several 

 leaves. Leaves glaucous, 1.5-2.5 cm. wide, the basal ones mostly shorter than 

 the stem ; bracts scarious ; flowers nearly sessile, large and showy, deep violet- 

 blue veined with yellow and brown or sometimes white ; outer perianth-segments 

 broadly obovate, 7-10 cm. long, their claws strongly crested ; inner perianth- 

 segments narrower, arching. Escaped from gardens to roadsides in Va. Native 

 of Europe. May-June. 



8. Iris fulva Ker. Red-brown Flag. (I. F. f. 1076.) Rootstock stout, 

 fleshy. Stems slender, 6-9 dm. tall, several-flowered and bearing 2-4 leaves; 

 leaves pale green and somewhat glaucous, 6-16 mm. wide ; pedicels 1-2.5 cm. 

 long, shorter than the bracts ; flowers reddish brown, variegated with blue and 

 green ; perianth-segments glabrous, crestless, the outer ones 3-5 cm. long, the 

 inner smaller, spreading ; style-branches 4-6 mm. wide. In swamps, S. 111. to Ga., 

 La.. Mo., Ark. and Tex. May-June. 



9. Iris Pseudacorus L. Yellow Flag. (I. F. f. 1077.) Rootstock thick. 

 Stems 3-9 dm. high, usually several-flowered ; leaves pale green and glaucous, 

 stiff. 8-16 mm. wide ; flowers bright yellow, short-pedicelled; perianth-segments 

 glabrous and crestless, the outer broadly obovate, 5-6 cm. long, the inner oblong, 

 nearly erect, scarcely longer than the claws of the outer ones; capsule obiong, 5-8 

 cm. long. In marshes, Mass. to N. Y. (Ohio?) and N.J. Nat. or adv. from Europe. 

 May-July. 



10. Iris cristata Ait. Crested Dwarf Iris. (I. F. f. 1078.) Rootstock 



