MONOCOTYLEDONS. " 41 



lobed, the tube adherent to the lower part of the ovary, lobes 

 spreading ; stamens 6, inserted on the lower part of the peri- 

 anth lobes, filaments slender, short ; ovary 3-celled, many- 

 ovuled, style slender, erect, persistent, shorter tlian the stamens; 

 fruit a o-ribbed, 3-furrowed capsule ; seeds oblong, ribbed. 



L. Americana (Pursh) Coville. Lopuiola. Stem erect, rigid, 

 smooth below, branched and woolly above ; basal leaves linear, sword- 

 shaped, eqiiitant, upper leaves scattered, smaller ; panicle very wliite- 

 woolly, becoming broad in fruit; perianth segments linear-oblong, 

 with a tuft of wool at the base witliin ; capsule shorter than tlie 

 perianth, ovoid. June-August. Wet pine barrens. 



18. IRIDACEJE. IRIS FAMILY. 



Perennial herbs from bulbs or rootstocks ; leaves 2-raiike(l, 

 equitant ; flowers perfect, regular or irregular, each subtended 

 by two bracts ; perianth 6-parted, the tube adherent to the 

 ovary, the segments in 2 series of 3 each, equal, or the inner 

 ones smaller ; stamens 3, distinct or united, opposite the outer 

 segments ; ovary forming a 3-celled, 3-angled, 3-valved, many- 

 seeded, dehiscent capsule. 



I. IRIS. 



Kootstock thick, creeping, branching, horizontal, sometimes 

 tuberous ; stems erect, simple or branched ; leaves linear or 

 sword-shaped ; flowers showy, the outer perianth segments 

 spreading or recurved, often bearded witliin, the inner seg- 

 ments usually smaller and erect ; stamens inserted in the base 

 of the outer segments ; tlie style deeply 3-])art(Ml, the divisions 

 broad and petal-like, covering the stanuMis; fruit an oblong 

 or oval, 3 or ()-anglt;d, many-seeded capsule. 



1. I. vp:rsic()Loii L. Laiuh-: ]\\ae Fi.ac. Rootstock thick, hori- 

 zontal; stem terete, smooth, simple or branched, leafy, 2-'-) ft. liigh ; 

 leaves linear-sword-shajH'd, finely-nerved, glaucous, the lower l.\-L* ft. 

 long, the upper short«'r ; brads longer than the j)edicels ; llowers 

 terminal, single or few together, hlue variegated with white, yellow, 

 and puri)le, ])eri:nitli segments not i>i'itrde(l. the inner ones snuiUer; 



