ANALYSIS OF THE ORDERS IN THALAMIFLOR#. 487 
Flowers not tetramerous. Unripe 
fruit usually open at the apex . Resedacex. 
Small hypogynous disk, or none. 
Albumen abundant. 
Flowers irregular . : Fumariaceex. 
Flowers regular. Sap milky. Fruit 
without central pulp c . Papaveracee, 
Fruit with central pulp, or fleshy. 
Sap watery . Bizaceer. 
Albumeninsmall quantity, or, want- 
ing. 
Caly x tubular, furrowed . « Frankeniacee, 
Placentas covering the dissepiments . Nympheacee. 
Placentas axile or free central. 
Styles distinct to the base. 
Caly x much imbricate. 
Seeds smooth. Petals unequal-sided, 
without appendages . ‘ Hypericacer. 
Seeds shaggy. Petals unequal-sided, 
usually with appendages at the 
base . . . . Reaumuriacex. 
Calyx slightly imbricate. 
Petals not twisted in zstivation. 
Ovary witha free central placenta Caryophyllacezx. 
Styles more or less combined. 
Calyx much imbricate, in an irre- 
gular broken whorl. 
Flowers symmetrical . - Cuttifere. 
Flowers unsymmetrical, papilion- 
aceous . Polygalacez. 
Calyx but little imbricate, i in a com- 
plete whorl. 
Carpels 4 or more. 
Ovary, 1-celled, with a free central 
placenta . F 5 . Portulacaceex. 
Carpels less than 4. 
Seeds comose . - 5 . Tamaricacee. 
Seeds not comose. 
Ovules pendulous. Petals twisted 
in estivation. : Canellacezx. 
Ovules ascending or horizontal. 
Petals imbricatei inestivation DPittosporaceex. 
Calyx valvate, or but very slightly 
imbricate. 
Anthers opening by pores’. . Tremandracee. 
B. Leaves with stipules. 
a. Carpels distinct, or solitary. 
Anthers with recurved valves. aes 
solitary . : : ° : Berberidacex, 
b. Carpels wholly combined (at least as to the 
uvaries), with more placentas than one. 
Placentas parietal. 
Leaves with involute vernation. Anthers 
crested, and turned inwards. Z . Violacezx. 
Stamens opposite to the petals. Anthers 
naked, and turned outwards. ‘ . Sauvagesiaceer, 
