622 PLAOTiE EXOGENiE THALAMIFLORJE. 
Subseries III. D. Plants exogenas thalamifloiue. 
Perigonium double; petals many, distinct or soldered to- 
gether, inserted along with the stamens on the thalamus. 
FAMILIES. 
A. Ovary single ; placentarium central; stamens more than 10. 
Stamens polyadelphous ; styles 3 or 5 ; 
leaves opposite ; flowers yellow .. HYPERICINEJE. 67. 
Stamens monadelphous ; styles many; 
leaves alternate ; cal . double ; pet . regular 
MALVACEAE. 69. 
Stamens distinct ; style 1 ; leaves alter- 
nate; petals 5 ; perisperm fleshy TILIACEiE. 70. 
B. Ovary single ; placentarium central ; stamens not more 
than 10. 
■ >N 
Perisperm 0 ; stigmata 5 ; ovary 5-sided ; 
stem herb. ; leaves stipuled, alternate . . GERANIEiE. 66. 
Perisperm 0; stigmata 5; ovary globular; 
stem herb.; leaves stipuleless LINEiE. 71. 
Perisperm 0 ; stigma 1 ; samar es 2 ; 
stem arbor.; leaves opposite; pet.5,e qual ACERINEiE. 68. 
Perisperm farinaceous ; corculum curved ; 
stem herb., jointed; leaves opposite; 
pet. 5, clawed CARYOPHYLLEiE. 71. 
C. Ovaries solitary , or many soldered together ; placentarium 
parietal; stamens more than 10. 
Petals 4 ; calyx 2-sepaled ; seeds many ; 
stamens many; ov ary 1 -celled. . . PAPAYERACEiE. 82. 
Pet. 5; calyx 5-sepaled; caps. 5-valved; 
stamens many; leaves opposite CISTINEiE. 73. 
Pet. 4 to 6, irregular; cal. 4 to 6-cut; 
stam. 10 to 20; ovary 1-celled; caps, gaping 
RESEDACEJE. 76. 
