336 OHDEU 142. - 



scarcely united. Ovary adherent at base only, opening at top, oo-seeded 

 U Smooth, intensely bitter. Leaves all radical, lin.-lanceolate. .11., Aug. 



1 A. fariiiosa L. Lvs. rosulate, very acute, many-veined, 36' ; scape 2 3f, simple ; 



rac. about !V; fix. white, 4 5", on very short ped., oblong bull-form. Low grounds. 



2 A. a urea Walt. Fls. yellow. Otherwise scarcely diff. Both plants dry, yellowish. 



ORDER CXLII. IRIDACEJS. IUIDS. 



Herb* with corms, bulbs, or rhizomes, equitant, 2-ranked leaves and spatha- 

 ceous bracts. Perianth tube adherent to the ovary. Segments in 2 sets, 

 often unequal and convolute in bud. Stamens 3, alternate with the petals, 

 anther* extrorse. Style 1, stigmas 3, often petaloid. Capsule 3-valved, 3- 

 celled, loculicidal. Seeds many, with hard, fleshy albumen. Figs. 85, 169, 

 170, 267-8, 282, 351. 



Flowers irregular, somewhat bilabiate, nodding (JLADIOLUS. 8 



Flowers regular and equilateral, mostly erect. . .(*) 



Sepals similar to the petals in form, size, and position... (a) 



n Stamens monadelphous. Flowers small, bine. Plant grass-like SISTRINCHIU.M. 7 



i Stamens distinct. x Flowers radical, with a very long tube CROCUS. 6 



x Flowers cauline. Style 3-parted at top HARDANTHCS. 5 



cr Flowers cauline. Style deeply 3-parted SCHIZOSTYUS. 4 



Sepals larger than the petals, aud otherwise dissimilar. . .(ft) 



/> Stamens monadelphous. Petals spreading, pandnriform. TiGRiniA. 3 



h Stamens distinct, z stigmas slender, on a slender style NEM ASTY us. 2 



3 stigmas petaloid, on a very short style IRIS. 1 



1. IRIS, L. FLOWER-DE-LUCE. Sepals 3, reflexed, larger than the 3 

 erect petals. Sta. distinct. Style short or 0. Stig. petaloid, covering the 

 stamens. if Mostly from tuberous, horizontal rhizomes, with ensiform 

 leaves and large, showy flowers. 



* Species growing wild, all (except Nos. 6. 7) in wet meadows or swamps. Apr. Jn. () 



3 Stems leafy, tall (1 3f). Tube short : sepals beardless and crestless. . .(a) 



a Leaves linear, grass-like. Ovary and pod 2-grooved on the sides No. 1 



a Leave* sword-shaped. Fls. blue. Sepals much larger than the petals. .. Nos. 2 4 

 a Leaves sword-shaped. Fls. tawny or copper-colored. Petals reflexed. . .No. 5 



Stems or scapes low (2 6'), nearly leafless. Tube long and slender. ..(b) 



b Sepals beardless and crestless. In hilly woods, southward No. 6 



b Sepals beardless, but crested with 8 longitudinal folds Nos. 7, 8 



Species cultivated for ornament, mostly from Europe. ..(x) 



v Sepalu densely bearded. y Stems very short, 1-flowercd No. D 



y Stems tall, leafy, 1-5-ttowered Nos. 10 13 



x Sepal* beardless. z Root a rhizome.. .Nos. 14, 15. 2 Root bulbous Nos. 1618 



1 I. Vlrginlca L. Roston Iris. Stem slender, 1 2f, branching leaves 2 8" wide ; 



fls. 2 H, on Blender ped. : sep. narrow, yellow, edged with purple. Mas?, to N. J. Jn. 



2 I. versieolor L. lilue Flag. Stem flexuous, 2 3f; pet. as long as the sti/mas; 



ovary triangular, with concave sides and rounded angles. Common. June. 



3 I. hexagona Walt. Lvs. longer than the flexuous stem ; tube longer than the H- 



sided ovary; sepals larger than the petals, blue-purple, crested. S., coastward. 



4 I. trf petala Walt. Lvs. shorter than the slender stem ; tube shorter than the 3- 



sided ovary ; sepals many times larger than the petals. S. : rare. Purple. 

 3 I. cuprea Ph. Tall and flexuous, 2 3f ; petals twice longer than the linear stiff 

 rnas ; capsules sharply 6-angled, shorter than the tune. S. and W. April July 



