Ixxviii - INTRODUCTION. 
§ 8. Corolla hypogynous, bearing the stamens. 
* Placenta free central. au 
- XLVI. Primulacee. Stamens isomerous and opposite the corolla- 
lobes. 
XLVII. Lentibulacex. Corolla very irregular. Stamens fewer than 
the lobes, and alternate with them. 
** Placentas parietal, or in the axial angle of the cells. 
a. Corolla regular, or nearly so. 
XLVIII. Oleaceze. Trees or shrubs. Stamens 2, alternating with the 
2 ovary-cells, and having no constant relation to the corolla-lobes. 
XLIX. Apocynacee. Corolla contorted. Stamensisomerous. Ovary 
of 2 carpels, usually distinct, whilst the styles are united at the top. 
L. Gentianacee. Bitter plants. Corolla contorted. Stamens iso- 
merous. Placentas parietal, rarely meeting in the axis. 
LI. Polemoniacez. Corolla contorted. Stamens isomerous. Ovary 
8-celled, with several seeds. 
LII.- Convolvulacee. Corolla plaited. Stamens isomerous. Ovary 
2- or 3-celled, with 2 (rarely 1) ovules in each, often separated by an 
additional false partition. 
LIII. Boraginee. Stamens isomerous. Ovary 2- or 4-lobed, with 
one ovule in each lobe. 
LIV. Solanacez. Stamens isomerous. Corolla plaited or imbricate. 
Ovary 2-celled, with several ovules in each cell. 
B. Corolla irregular. Stamens 1 less or 3 less than the lobes. 
LV. Orobanchacee. Leafless parasites. Placentas parietal, or rarely 
meeting in the axis. 
LVI. Scrophularinee. Ovary 2-celled, with several ovules in each cell. 
LVII. Labiate. Ovary 4-lobed, with 1 ovule in each lobe. 
LVIII. Verbenacez. Ovary entire, 2- or 4-celled, with 1 ovule in 
each cell. 
*** Anomalous families. 
LIX. Plumbaginez. Ovary with 1 cell and ovule, but several styles. 
LX. Plantaginee. Corolla scarious. Stamens isomerous. 
Subclass 4. MoNOCHLAMYD.—Perianth really or apparently simple, 
or none. [xceptions.—Petals are present in some Illecebraceze. ] 
LXI. IlNecebraceee. Perianth small, rarely double. Ovary with 1 
cell and ovule, but 2 or 3 styles or stigmas. Leaves usually opposite, 
with scarious stipules. 
LXII. Chenopodiacex, Perianth small ; stamens opposite to its lobes. 
Ovary with 1 cell and ovule, but 2 or more styles or stigmas. No ~ 
stipules. 
LXIII. Polygonacez. Perianth small. Ovary with 1 cell and ovule, 
put 2 or more styles or stigmas. Stipules sheathing. 
LXIV. Thymeleacez. Stamens inserted in the tube of the perianth, 
and usually double the number of its lobes. Ovary free, with 1 pen- 
dulous ovule. One style. 
