CONSPECTUS OF THE ORDERS CONTAINED IN 

 THE SEVENTH VOLUME. 



Class IL MONOCOTYLEDONES. 



Embryo with a single cotyledon. Perianth usually trinierous. Leaves parallel- 

 veined. Vascular bundles irregularly scattered in the stem. 



Series X. IVXicrospermae. — Perianth {at least the inner) petaloid. Ovary 

 inferior, 1-celled with 3 parietal placentas, rarely 3- or 6- celled with axile placentas. 

 Seeds small, numerous, exalhuminotis . 



CXXXI. Hydeochaeideje. Aquatic herbs. Flowers regular, usually unisexual. 

 Outer perianth calyx-like, inner (when present) petaloid. Stamens 3-12. 



CXXXn. Btjemanniace^. Terrestrial, usually leafless, herbs. Flowers regular, 

 rarely irregular. Perianth petaloid. Stamens 3. 



CXXXin. OECHiDEiE. Terrestrial or epiphytic, rarely climbing, herbs. Flowers 

 usually very irregular. • Perianth petaloid. Andrcecium united with the gynaeceum 

 into a column ; anther 1, sessile or subsessile on the column. 



Series ZZ. Epigrynse. — Perianth {at least the inner) petaloid. Ovary inferior 

 {half-inferior or superior in Hsemodoraceae). Albumen copious. 



CXXXIV, SciTAMiNEiE. Flowers irregular. Outer perianth usually calyx-like, 

 inner petaloid. Stamens 1 or 5 perfect; staminodia 5 or 1. Ovary usually 3-celled; 

 ovules 1-x . Seed usually arillate. Embryo in a central canal of the albumen, 

 straight or curved. 



CXXXV. HjEmodoeaceje. Flowers hermaphrodite, regular or slightly irregular. 

 Perianth petaloid, inferior or half-superior in the Tropical African genera. Stamens 6, 

 all perfect. Ovary superior or half-inferior. Fruit dehiscent or indehiscent. Seed 

 with embryo placed in a marginal hollow of the fleshy albumen. 



CXXXVI. IeidEjE. Flowers hermaphrodite, regular or irregular. Perianth 

 petaloid, superior. Stamens 3, placed opposite the outer lobes of the perianth. Fruit 

 a 3-celled capsule, with loculicidal dehiscence. Seed with embryo surrounded by 

 horny albumen. 



CXXXVII. AmaeyllidEjE. Flowers hermaphrodite, regular or nearly so. 

 Perianth petaloid, superior. Stamens 6. Fruit a 3-celled capsule with loculicidal 

 dehiscence or indehiscent. Seed with embryo enclosed in the usually fleshy albumen. 



CXXXVII I. Taccace-E. Flowers regular. Perianth petaloid or subherbaceous. 



