30 KEY TO THE FAMILIES. 



Leaves without stipules and with glandular 

 dots ; carpels and styles 4-5, more or less 



united (Boronia) Rutaceae 65. 



0. Sepals, petals and stamens 5 ; ovary 5-celled, with 



5 styles ; capsule ; herbs (Flax) Lin ace ae 63. 



N. Anthers opening by terminal pores ; ovary 2-celled ; 

 style simple ; compressed capsule. 

 Flowers regular ; sepals and petals 4-5 ; stamens twice 



as many ; anthers 2-4-celled ; heath-like shrubs . . Tremandraceae 66. 

 Flowers irregular ; sepals 5, the 2 inner ones larger 

 and petaloid ; seeds hair-tufted in Comesperma ; 



herbs or undershrubs (Milkwort) Polygalaceae 67. 



M. Sepals and petals reduced or absent ; flowers uni- 

 sexual ; albumen copious. 

 Capsule usually splitting into 3 2-valved fruitlets, 

 which separate from the persistent axis ; sepals 

 4-5 (absent in Euphorbia) ; petals 4-5, sometimes 

 absent ; stamens 1-many ; seeds often caruncu- 



late ; shrubs or herbs (Spurge) Euphorbiaceae 68. 



Fruit dividing into 4 fruitlets without persistent 



axis ; stamen 1 ; leaves opposite ; aquatic herb Callitrichaceae 69. 

 H. Order Sapindales. Like Geraniales (ovary superior), 

 but the arrangement of the ovules on the placenta is 

 reversed ; the ovules are either pendulous with a dorsal 

 rhaphe and superior micropyle, or ascending with a 

 ventral rhaphe and inferior micropyle. 

 Flowers regular, bisexual ; sepals and petals 5, free or 

 united ; stamens 5 ; ovary 3-5-celled ; fruitlets 3-5, 

 separating from the persistent axis ; albumen present ; 



herbs Stackhousiaceae 70. 



Flowers mostly regular, polygamous or unisexual ; sepals 

 and petals 4-5, or petals wanting (in Dodonaea) ; stamens 

 usually 8, between disk and ovary ; ovary usually 

 3-celled ; fruit often a winged capsule ; no albumen ; 



trees or shrubs (Hopbush) Sapindaceae 71. 



H. Order RhamnaUs. Flowers regular, bisexual ; calyx - 

 lobes 4-5, often caducous ; petals perigynous, minute, 

 4-5, or none ; stamens 4-5, opposite the petals ; ovary 

 2-4-celled, superior or almost inferior ; drupe or 

 capsule ; seeds usually albuminous ; shrubs (Buckthorn, 



Spyridiuni) Rhamnaceae 72. 



H. Order Malvales. Flowers usually double, bisexual and 

 regular ; sepals and petals usually 5 ; stamens 5-many, 

 often united ; carpels united in a many-celled superior 

 ovary ; seeds albuminous. 

 Q. Anthers 1 -celled; calyx 5-lobed ; petals cohering at 

 base ; stamens many, united in a tube surrounding the 

 pistil ; fruit dividing into many fruitlets or united in a 



capsule ; herbs or shrubs (Mallow Family) Malvaceae 74. 



Q. Anthers 2-celled ; ovary 2-5 celled. 



Sepals and petals 4-5 ; stamens few to many ; style 



1 ; shrub Tiliaceae 73. 



Calyx 5-lobed ; petals sometimes minute or wanting ; 

 stamens 10-15, united in a tube, or 5, free or 

 united, sometimes with alternating staminodia ; 

 styles as many as cells, more or less united ; 



shrubs or trees (Kurrajong) Sterculiaceae 75. 



F. Pistil syncarpous (carpels almost free in Dilleniaceae) ; 

 ovary superior ; stamens hypogynous. 

 Order Parietales. Flowers double ; pistil composed of 2 

 or more carpels, which are usually united in a 1 -celled 

 superior ovary. 

 R. Flowers regular, bisexual. 



Sepals and petals 5 ; stamens few to many ; carpels 

 2-5, almost free ; seeds few, albuminous, with an 



arillus ; small heath-like shrubs (Hibbertia) Dilleniaceae 76. 



Sepals and petals 5 ; stamens numerous, united in 

 bundles ; ovary 1 -celled, with 3-5 parietal placentas 

 and styles ; seeds numerous, exalbuminous ; herbs 

 with opposite dotted leaves (St. John's Wort) .... Guttiferae 77. 



