1. 



IRIDEJ5. (IRIS FAMILY.) 



1RI$!», L. Flower-de-Luce. Iris. 



767 



Susan 



Perigonium tubular at base, regular, 6-cleft ; the outer 3 divisious 

 spreading or reflexed ; the inner 3 generally erect. Stamens 3, dis- 

 tinct, inserted at the base of the outer divisions of the perigonium, 

 the anthers extrorse, under the petaloid stigmas. Pod 3-celled; ovules 

 numerous, implanted in central placentce — Perennial herbs, with creep- 

 ing or tuberous root-stocks, sword-shaped, or grassy leaves, and large 

 showy flowers. 



Fig. 357. 



(ft) Plant of the genus Iris, showing the roots, the equitant leaves, and the flower, {h) 

 Tip of the style, showing the petaloid stigmas, and the stamens below them, with their 

 extrorse anthers, (c) Longitudinal section of the ovary, with two, equitant leaves, (d) 

 Transverse section of the ovary, (e) A seed. (/) A longitudinal section of tlie same 

 sJjowing the embryo in its fleshy albumen 



* Root a dulb, icith <i fibrous envelope. 

 t Inner didistons of jjerigoniwn erect, neavly as long as outer. 

 I Filaments at louder part monadelpilious and united with style. 



1 I. Sisyrinchium. 



\ \ FUamentsfree. 



2 I. histrio. 



t t Inner divisions of perigonium smalt, horizontal or defiexed. Filaments 

 free along their whole length. 



3 I. Palsestiua, 4 fumosa. 



'^' * Ttoot-stoH- comi'Oxed of naked, oMviae or creeping tubers and /ibres. 



Ovary d-celled. 



