SYNOPSIS OF THE NATURAL ORDEES. 
XXXI 
Male flowers in catkins. Ovaries (or ovules) on a scale 
in tlie axil of a bract ; or in a cup . . Ixxviii. Coniferce. 
65 Leaves net-veined. Floral envelopes whorled CG 
Leaves parallel-veined, persistent. Ploral envelopes 
whorled, or none t)7 
Leaves parallel-veined, persistent. Floral envelopes 
imbricate, bractlike 78 
66 Perianth inferior. Flowers perfect . . Ixxix. TriUiaceee. 
Perianth superior. Flowers dicecious. 
Ixxx. Dioscoreaeece. 
67 Ovaries several, each bearing a style or stigma (t8 
Ovary 1, inferior 69 
Ovary 1, superior 72 
68 Perianth 4-parted, inconspicuous or none. 
xciv. Potamogetotiaceee. 
Perianth 6-parted, conspicuous. Cai-pels not opening. 
xc. Alismacece. 
Periafith 6-parted, conspicuous. Carpels opening at 
their inner edge Ixxxvii. Colchicacece. 
69 Stamens and style imited in a central column. 
Ixxxii. Orckidaceee. 
Stamens free from the style 70 
70 Perianth wholly petal-like 71 
Three outer segments of perianth resembling an herba- 
ceous calyx Ixxxi. Hydrocharidacece. 
71 Stamens 3. Anthers bursting outwards. 
Ixxxiii. Iridacea. 
Stamens 6. Anthers bursting inwards. 
Ixxxiv. Amaryllidacea. 
72 Perianth like a corolla of 6 petals. Flowers perfect . . 73 
Perianth more or less glumaceous, or partly coloured, 
or wanting 74 
73 Perianth petal-like, conspicuous. Fruit dry, biu'sting 
with 3 valves Ixxxvi. Liliacece. 
Perianth petal-like, conspicuous. Fruit succulent, not 
bursting Ixxxv. Asparat/acecs. 
Perianth herbaceous, scale-like. Fruit baccate, not 
bursting xcii. Aracecs (Oronteae). 
74 Flowers perfect. Perianth 6-parted. Stamens 6. 
Ixxxix. Juncacece. 
Flowers monoecious 75 
75 Flowers on a spadix 76 
Spadix wanting 77 
Flowers solitaiy xcv. NaiadacecB. 
76 Flower on a thick spadix. Spath wanting. Anthers 
wedgeshaped, erect ; filaments long. 
xci. Typhacece. 
