10 FLORA OF SOUTH AUSTRALIA. 
Seeds large, winged, exalbuminous ; stamens 
in pairs ; leaves opposite ; corolla bilobed 
Ovary 2- to 4-celled, ovules few. 
Ovary 2-celled, 2 or more ovules in each ; 
seeds exalbuminous ; leaves opposite 
Ovary 2-celled, but divided in 4 cells by 
spurious dissepiments, one erect ovule in 
each 
Fruit 2- to 4-celled ; seeds albuminous. 
Fruit 4-celled, drupaceous or separating 
into fruitlets, rarely dehiscent ; seeds 
erect, 1 in each cell; leaves usually 
opposite ; stigma bilobed 
Fruit indehiscent, seeds pendulous, 1 to 
4 in each cell; leaves usually alter- 
nate, often dotted ; stigma simple 
Bignoniaceae 
Acanthaceae 
Pedalineae 
Verbenaceae 
Myoporineae 
Sub-Class V.—Gymnosperms. 
Branching trees, leaves scale-like whorled or opposite; 
stamens in catkins, sessile on dilated scale-like bracts; 
ovules in the axils of a cone 
Coniferae 
Trunks simple with a palm-like crown of large pinnate leaves ; 
anthers on the under side of the scales of a large cone; 
ovules in the axils of a cone 
Cycadeae 
CLASS II.—MONOCOTYLEDONS. 
Sub-Class I.—Florideae Perigynae. 
Flowers regular, mostly unisexual; sepals herbaceous ; 
petals coloured, often very tender and fugacious, 
or absent; fruit not bursting, placentas parietal ; 
aquatic herbs... 
Flowers irregular, the lower petal (labellum) usually 
unlike the two others; sepals 3, usually petaloid ; 
anther one, on a central column bearing the 
stigmas which are confluent in a mucous disk; 
pollen in masses; fruit dehiscent, placentas 3 
parietal; terrestrial herbs with tuberous root- 
stock; rarely epiphytic 
Flowers regular of 6 petaloid parts. 
Stamens 3, opposite the calyx-lobes; anthers 
extrorse nee 
Stamens 6, anthers bursting inwards 
Hydrocharideae 
Orchideae 
Irideae 
Amaryllideae 
