vi GENEBAL KEY. 



Ovules more than 1, in center or bottom of cell. 

 Petals not inserted on the calyx. 



Caryophyllaceae in CHENOPODIALES 132 

 Petals inserted on the throat of a bell-shaped or tubular 



calyx Ltthraceae in MYBTALES 230 



Ovules several or many, on 2 or more parietal placentae. 

 Leaves punctate with pellucid and dark dots. 



Hypericaceae in PAEIETALES 222 

 Leaves beset with reddish, gland-tipped bristles. 



Droseraceae in SABEACENIALES 166 

 Leaves neither punctate nor bristly-glandular. 

 Sepals 5, very unequal, or only 3. 



Cistaceae IN PAEIETALES 222 

 Sepals and petals 5; stamens 5 or 10. 



Saxieragaceae in EOSALES 167 

 Ovary 2-several-celled. 

 Flowers irregular. 



Anthers opening at the top. . Polygalaceae in GEEANIALES 205 

 Anthers opening lengthwise. 



Stamens 12; petals 6 on the throat of a tubular inflated 



or gibbous calyx Parsonsia in MYETALES 231 



Stamens 5-8 or 10; petals hypogynous or nearly so. 



SAPINDALES 214 

 Flowers regular or nearly so. 



Stamens neither just as many nor twice as many as the petals. 



Triadelphous ; petals 5 . . Hypericaceae in PAEIETALES 222 

 Tetradynamous (or rarely only 2 or 4); petals 4; pun- 

 gent herbs Crucieerae in PAPAVEEALES 154 



Distinct and fewer than the 4 petals. 



Oleaceae in GENTIANALES 253 

 Stamens just as many or twice as many as the petals. 

 Ovules and seeds only 1 or 2 in each cell. 



Herbs GEEANIALES 205 



Shrubs or trees. 



Leaves 3-foliolate, pellucid-punctate. 



Ptelea in GEEANIALES $09 



Leaves simple, not punctate SAPINDALES 214 



Ovules (and usually seeds) several or many in each cell. , 

 Stipules between the opposite and simple leaves. 



Elatinaceae in PAEIETALES 222 

 Stipules between the opposite and compound leaves 



(caducous) Staphylea in SAPINDALES 21 7 



Stipules none when the leaves are opposite. 



Stamens 10, monadelphous at base; leaflets 3, 

 inversely heart-shaped. 



Oxalis in GEEANIALES $07 

 Stamens distinct, free from calyx. 

 Style 1, undivided. 



Ericaceae in EEICALES* 244 

 Styles 2-5, separate. 



Caryophyllaceae in CHENOPODIALES 132 

 Stamens distinct, inserted on the calyx. 



Styles 2 (or 3), or splitting into 2 in fruit. 



Saxifragaceae in EOSALES 167 

 Style 1 ; pod in the calyx 1-celled. 



Ltthraceae in MYETALES 230 



2. Calyx-tube adherent to the ovary, at least to its lower half. 



Tendril-bearing and often succulent herbs. 



Cucurbitaceab in CAMPANULALES* 305 

 Not tendril-bearing. 



