500 lUlDACK.i:, (IKIS FAMILY.) 



varicpatod with wliito, vcllow, iuiil jiiir|)lc, tlic iiitlaicil tiiho sliortor fliaii the 

 ohtuselv 3-aii;;kMl ovary ; lips of the stijiiiias cnlirc or slij^hlly crciiate ; rajisiile 

 obhMip, olitusoly ."J-aiipjlcd. — Wet places. Ajiril-May. — Stem 14°-2° high. 

 Lowest leaves Ii°-2° long, 1'- 1 J' wide. I'eriaiitli '2' long. 



2. I. Caroliniana, Watson, stem .slender, 2° high ; leaves tliin, bright 

 green; flowers in )iairs ; ])erianth lilac, veined with j)nrj)le, the tube shorter 

 than the ovary ; eaj>snle oblong, round-angled ; seeds large (4"-.'J" broad), in 

 a single row in each cell. — Wilmington, North Carolina {Watson). — Leaves 

 3° long. I'l riantli .'!' long. 



3. I. hexagona, Walt. Stem terete, sim])le ; leaves linear-sword shaped ; 

 flower-s axillary and terminal, solitary, crested ; ])eriantli deep Idue, variegated 

 with vvliite, yellow, and purple; the cylindrical angular tube longer tlian the 

 6-angled ovary; stigmas much longer than tlieauthers, the largi; lips toothed; 

 capsule oldong-cylindrical, fi-angled. — Swamps, Florida to South Carolina, 

 near the coast. April. — Stem 2° -3° high. Lowest leaves 2°-3° long. 

 Flowers 4' long. 



4. I. CUprea, rursh. Stem simple, furrowed and l-an;.'led below ; leaves 

 linear-swordshaped ; flowers axillary and terminal, single or l>y pairs, crest- 

 less, dull yellow^ ; tube of the perianth somewhat inflated, as long as the 6- 

 angled ovary ; stigmas scarcely longer than the anthers, the lips nearly 

 entire ; capsule tumid, G-angled. — Swamps in the lower districts of Georgia 

 (Elliott), and westward. April -May. — Stem .3° high. Leaves 2° long. 

 Flowers 2' long. 



5. I. tripetala, Walt. Stem terete, simple, or with peduncle-like 

 branches ; leaves rather short, sword-shaped, glaucous ; flowers terminal, 

 solitary, crestless, bine, variegated w^ith yellow and pur])le ; inner divisions of 

 the perianth very short, wedge-shaped ; stigmas toothed ; capsule oval, 3- 

 angled. — Pine barren swamps, Florida to North Carolina. June -July. — 

 Stem l°-2' high. Leaves 1° long. Flowers 2' -3' long. 



6. I. Virginica, L. Stem slender, simple ; leaves elongated, grass-like ; 

 flowers 2-6, terminal, on a long and slender peduncle, crestless, blue and 

 white ; ovary 3-angled, 2-furrowed on the sides, much longer than the very 

 short tube of the .perianth ; capsule 3-angled, acute at each end. — Swamps, 

 North Carolina to Tennessee. June. — Stem and lower leaves 2° long. 

 Flowers IV long. 



* * Stems low, with sheath-like leaves: divisions of the perianth nearli/ equal. 



7. I. verna, L. Stem very short, concealed by the short spathe-like 

 leaves, l-flowered ; proper leaves linear-sword-shaped, glaucous ; perianth pale 

 blue, crestless, the divisions about as long as the filiform partly concealed 

 tube; capsule 3-angled. — Fine barrens of tiie middle districts, mo.stly in dry 

 soil, Alabama to North Carolina. Ajiril. — Leaves 5' -8' long. Limb of the 

 perianth 1' long. 



8. I. cristata, Ait. Stem 1 -3-flowered ; leaves lanceolate (3' -5' long) ; 

 outer divisions of the perianth crested, much shorter than the filiform tube ; 

 capsule acutely 3-angled ; otherwise like tlie preceding. — ^louiitaius of Geor- 

 gia and North Carolina. May. 



