450 IRIDACEAE. 
6. Iris prismatica Pursh. Slender Blue Flag. (Fig. 1074.) 
Tris Virginica Muhl. Cat. 4. 1813. Not L. 1753. 
Iris prismatica Pursh, Fl. Am, Sept. 30. 1814. 
Tris gracilis Bigel. Fl. Bost. 12. 1814. 
Rootstock rather slender, tuberous-thickened. 
Stems slender, often flextous, 1°-3° tall, usually 
simple, bearing 2 or 3 leaves; leaves almost grass- 
like, 114//-244/ wide, mostly shorter than the 
stem; flowers solitary or 2 together, blue veined 
with yellow, slender-pedicelled; pedicels com- 
monly longer than the bracts; outer perianth-seg- 
ments 1'4’—2’ long, glabrous and crestless, the in- 
ner smaller and narrower, the tube 2//-3’’ long 
above the ovary; capsule narrowly oblong, acute at 
each end, sharply 3-angled, 1/-114’ long, 3//-4’” 
thick; seeds about 1’’ broad, thick, borne in 1 row 
in each cavity. 
In wet grounds, New Brunswick to Pennsylvania and 
North Carolina, mainly near the coast. May-June. 
7. Iris Germanica IL. Fleur-de-lis. 
(Fig. 1075.) 
Iris Germanica ¥,. Sp. Pl. 38. 1753. 
Rootstock thick. Stems stout, usually branched 
and several-flowered, 2°-3° tall, bearing several 
leaves. Leaves glaucous, 8//—2’ wide, the basal ones 
mostly shorter than the stem; bracts scarious; flowers 
nearly sessile in the bracts, large and very showy, 
deep violet-blue veined with yellow and brown or 
sometimes white; outer perianth-segments broadly 
obovate, 3’-4’ long, their claws strongly crested; inner 
perianth-segments narrower, arching. 
Escaped from gardens to roadsides in Virginia. Native 
of Europe. May-June. 
Iris Duerinckii Buckley, Am. Journ. Sci. 45: 176, de- 
scribed from specimens collected at St. Louis, Mo., but 
doubtless cultivated, appears to be /. ap/yiia I,., a native e/ 
of central Europe. L- ¢ — 
8. Iris falva Ker. Red-brown Flag. 
(Fig. 1076.) 
Tris fulva Ker, Bot. Mag. pl. 1496. 1812. 
Iris cuprea Pursh, Fl, Am. Sept. 30. 1814. 
Rootstock stout, fleshy. Stems rather slender, 
2°-3° tall, simple or branched, several-flowered and 
bearing 2-4 leaves; leaves pale green and some- 
what glaucous, shorter than or equalling the stem, 
3//-8’’ wide; pedicels %4/-1’ long, shorter than the 
bracts; flowers reddish brown, variegated with 
blue and green; perianth-segments glabrous, crest- 
less, the outer ones 14’—2/ long, the inner smaller, 
spreading; style-branches 2//-3’’ wide. 
! / In swamps, southern Illinois to Georgia and Louisi- 
ie —= ana, west to Missouri, Arkansasand Texas. May-June. 
