IXIACEAE 355 
88. I. foliosa Mackenzie & Bush. Flower-stalk o 3-5 dm. long, zig- 
zag, the internodes rather unequal, some of them ver rt: flowers two to- 
gether in the terminal involucre and usually single in ie several greatly elon- 
gate lateral e Ru T hypanthium covering the ovary promi- 
nently 6-angled: sepals 8-1 ong, spreading, the claw suffused with 
lowish- -green, the blade edge mai nly of a clear-violet or deep-blue RAN 
color, with white flecks at the base on either side of a yellowish blotch and the 
yellow crest: petals iy eae slightly shorter than the sepals, the claw suf- 
fused and lined with green, the blade longer than the claw, slightly paler than 
the sepal-blade and more or ai whitish or green-tinged at the base: capsule 
ovoid or ellipsoid. ovoid, 3-5 em. long, each lobe with 2 lateral sharp ridges, 
pw 6- rds ed.—Open woods aun E — al Plain and adj. provinces, 
—Spr 
. to ; Ohio, and Ky.—5pr. e es Ea ue and the flower- 
dum usually ‘Ties on ie ground among res them he deep-green, 
flaccid leaves and the Zag flower-stalk are in striking contrast to those parts 
of the next- follow! ing P with which it has sometimes been confused. 
89. I. brevipes Small  Flower-stalk subereet, 1—1.5 dm. long, very zigzag, 
often flowering from the very ne se, the inte rnodes short, flowers two together 
in the terminal oe and u ually one in the two to four lateral involucres: 
hypanthium covering the ovary sharply 6-an ngled: sepals spreading, 7-8 em. 
long, the claw seta eream, its midrib yellow-green, its wi ngs flushed rosy- 
lavender and veined sm moky lilac, the blade ovate, with a truncate base, violet 
or rtr scarcely veine ed 2 darker around se the erest yellow, the 
the ds als li 
in ight 
viole t-blue, T ming paler cone rds the base, scarcely clawed: style-branches 
red-violet ; es heey or blue-violet, ‘shallowly toothed, nearly lanceo- 
late: capsule o m. long, each lobe with 2 lateral sharp ridges 2m 
capsule hence "i -an glod- vam ps, marshes, ditches, and stream ban 
Spr.—This iris is the lowest growing and most ne arly blue- PARU A 
among the gulf states irises yet discovered. 
90. I. mississippiensis Alexander. — stalk nearly erect, 1-2 dm. long, 
very zigzag, flowering from near the base, but usually hn f basal s like 
braet below the pi QE the internodes short, flowers 2 together in the 
terminal involucre and usual 1 in the two to four eae o hy- 
panthium covering the e sharply 6-angled: sepals recurved recurved- 
spreading, 6-7 em. long, the claw white, the veins Boch ole the blade 
lavender to lavender-violet eee in albinos), | pees ular to orbicular-ovate, 
its base tapering, the crest yellow, often mall lateral s of yellow, 
but all surrounded by a radial zone of. n pretend que pale v violet, 
extending well out nearly to the middle of the blade: Et lavender or 
d 
pr.—T ery f 
concealed by the p jos Its range is pop iis cud it may possibly ex- 
tend as far east as Ala. A pure white form is kno 
91. I. prismatica Pursh. Flower-stalk erect, 3-6 dm. tall: flowers pies. 
usually 5 pairs in the terminal involucre: hypan nthium covering the ovary 
sharply 3-angled: sepals mainly of a blue ground-eolor, 3.5-5 cm. inne. re- 
eurved-spreading, the claw more or less suffused with yellowish-green and 
j j e b 
ed h blue m shor a 
the sepals, the claw ide the blade blue: capsule erect, narrowly prismatie- 
eylindrie, 3—5 em. lon ng» angled, shortly pen ed at the apex. [I. virginica 
Pursh, no ce Mar swamps, and ditches, often in acid soils, Coastal 
Plain and de e Piedmont and Blue Ridge, Ga. to N. 8.—Spr.—sum.—As 
