sryopsis of the nactteal okdees. xxxui 



62 Leaves net-veined. Floral envelopes whorled 63 



Leaves net-veined. Perianth none. M. monoecious, 



on a spadiz xciii. Aracecs (Arese). 



Leaves parallel-veined, persistent.. Floral envelopes 



whorled, or none t]i 



Leaves parallel-veined, persistent. Floral envelopes 



imbricate, bractlike . . . . ; 7>5 



63 Perianth inferior. Flowers perfect . .Ixxx. TriUiacees. 

 Perianth superior. Flowers dioecious. 



Ixxxi. Dioscoreacece, 



64 Ovaries several, each bearing a style or stigma ...... Go 



Ovary 1, inferior (iO 



Ovary 1, superior 69 



65 Perianth 4-parted, inconspicuous or none. 



xcv.- Potamogetonacece. 

 Perianth 6-parted, conspicuous. Carpels not opening. 



Ixxxvi. Alismacete. 



Perianth 6-parted, conspicuous. Carpels opening at 



their inner edge Ixxxix. Melanthacece. 



66 Stamens and style united in a central column. 



Ixxxiii. OrcMdacece. 

 Stamens free from the style 67 



67 Perianth wholly petal-like 68 



Three outer segments of perianth resembling an herba- 

 ceous calyx Ixxxii. Sydrocharidacece. 



All the 4 segments of perianth resembling an herba- 

 ceous calyx xl, Lnranthacea. 



68 Stamens 3. Anthers bursting outwards. 



Ixxxiv. Iridacece. 

 Stamens 6. Anthers bursting inwards. 



Ixxxv. Amaryllidacecs. 



69 Perianth like a corolla of 6 petals. Flowers perfect . . 70 

 Perianth more or less glumaoeous, or partly coloured, 



or wanting 71 



70 Perianth petal-like, conspicuous. Fruit dry, bursting 



with 3 valves Ixxxviii. Liliacecs. 



Perianth petal-like, conspicuous. Fruit succulent, not 



bursting Ixxxvii. Asparagacece, 



Perianth herbaceous, scale-like. Fruit baccate, not 



bursting xciii. Aracecs (Orontese). 



71 Flowers perfect. Perianth 6-parted. Stamens 6. 



xc. Jimcacea. 

 Flowers monoecious 72 



72 Flowers on a spadii 73 



Spadix wanting 74 



Flowers solitary xcvi. Naiadacece. 



65 



