1, Ovary or its cells con taining many ovules, 
Ovary and pod inferior, 4-celled; stamens 4 ........ -Ludwigia, in ONAGRARIE®, 113 
Ovary and pod superior, 
3-celled and 3-valved, or 3-5-celled and circumscissile..... a eecees FICOIDE®, 137 
2-celled or 1-celled ; placent« central. 
Stamens inserted on the tube or throat of the calyx...-...LYTHRARIE®, 111 
Stamens inserted on the receptacle or base of the calvx.CARYOPHYLLE®, 28 
1-celled, with one parietal placenta : 
Ovaries two or more, separate, simple = § °°" 77 Te tt tree cree e ee RANUNCULACEA, 6 
2. Ovary, or its cells containing only 1 or 2 (rarely 3 or 4) ovules. 
* Pistils more than one, and distinct or nearly 80. 
Stamens inserted on the calyx; leaves with stipules....-......... ----ROSACE#, 101 
Stamens inserted on the receptacle ; calyx present and usually 
colored or petal-like ..........2...... © eee ne nee cee e ee nes RANUNCULACE&, 6 
** Pistil one, either simple or compound, 
Ovary wholly inferior (in perfect or pistillate flowers), 
Aquatic herbs; ovary 3 or 4-celled, or (in Hippuris) 1-celled. -- HALORAGE®, 110 
Trees; ovary l-celled ..............----.eeee een eee nee Nyssa, in CORNACE®, 151 
Ovary plainly free from the calyx, which is sometimes wanting. 
Aquatic herbs, submerged or nearly so ..............----..---- HALORAGES#, 110 
Shrubs or trees. 
Ovules a pair in each cell of the ovary; fruit 
2-celled, a double samara .......2-. 22224 -Acerinex, in SAPINDACE®, 64 
Ovules single in each cell of the 3-celled ovary..--...2..-... RHAMNEX, 57 
As it has been thought best to use the metrical system in all measurements, the 
following table may be found useful : 
| mm.} cm. | dm i) 
One line .......... | i rd hs Pe 
One Inch... _ -| 25 a5 — —_ 
One foot .......... —_ 30 _— oe 
Four feet ......... | es 12 1.2 
