xxiviii SYNOPSIS of the natural orders. 
61 Perianth 3 — 5-cleft, herbaceous Ixv. Che'nopodiaceoe^ . 
Perianth 3-cleft, scarious Ixiv. Amaranthacece. 
Perianth tubular. Stamens perigynous. 
Ixviii. Thymelacece. 
Perianth 6— 8-parted, herbaceous. Stamens hypo- 
gynous Ixxx. Trilliaceve. 
62 Leaves net-veined. Floral envelopes whorled 63 
Leaves net-veined. Perianth none. Fl. monoecious, 
on a spadix xciii. Ai-acece (Areas). 
Leaves parallel-veined, persistent. Floral envelopes 
whorled, or none 64 
Leaves parallel-veined, persistent. Floral envelopes 
imbricate, bractlike 75 
63 Perianth inferior. Flowers perfect... Ixxx. Trilliaceoe. 
Perianth superior. Flowers dioecious. 
Ixxxi. Dioscoreaceoe. 
64 Ovaries several, each bearing a style or stigma 65 
Ovary 1, inferior 66 
Ovary 1, superior 69 
65 Perianth 4-parted, inconspicuous or none. 
xcv. Potamogetonaceoe. 
Perianth 6-parted, conspicuous. Carpels not opening. 
Ixxxvi. Alismacece. 
Perianth 6-parted, conspicuous. Carpels opening at . 
their inner edge Ixxxix. Melanthacece. 
66 Stamens and style united in a central column. 
Ixxxiii. Orchidaceoe. 
Stamens free from the style 67 
67 Perianth wholly petal-like 68 
Three outer segments of perianth resembling an herba- 
ceous calyx Ixxxii. Hydrochar-idaceoi. 
All the 4 segments of perianth resembling an herba- 
ceous calyx xl. LoranthaceoE. 
68 Stamens 3. Anthers bursting outwards. 
Ixxxiv. Iridacece. 
Stamens 6. Anthers bursting inwards. 
Ixxxv. Amaryllidaceoi. 
69 Perianth like a corolla of 6 petals. Flowers perfect.... 70 
Perianth more or less glumaceous, or partly colom-ed 
or wanting 71 
70 Perianth petal-like, conspicuous. Fruit dry, bursting 
with 3 valves Ixxxviii. Liliaceop. 
Perianth petal-like, conspicuous. Fruit succulent, not 
bursting Ixxxvii. AsparagaceoB. 
Perianth herbaceous, scale-like. Fruit baccate, not 
bursting xciii. Araceoe (Orontese). 
