vi GENERAL 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 Lythraceae in M YRTALES 230 



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

 Leaves punctate with pellucid and dark dots. 



Hypericaceae in PARIETALES 222 

 Leaves beset with reddish, gland-tipped bristles. 



Droseraceae in SARRAOENIALES 166 

 Leaves neither punctate nor bristly-glandular. 

 Sepals 5, very unequal, or only 3. 



CiSTACEAE in PARIETALES 222 

 Sepals and petals 5 ; stamens 5 or 10. 



Saxifragaceae in ROSALES 167 

 Ovary 2-several-celled. 

 Flowers irregular. 



Anthers opening at the top. . Polygalaceae in GERANIALES 20.5 

 Anthers opening lengthwise. 



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



or gibbous calyx Parsonsia in MYRTALES 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 PARIETALES 222 

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

 gent herbs Cruciferae in PAPAVERALES 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 GERANIALES 205 



Shrubs or trees. 



Leaves 3-foliolate, pellucid-punctate. 



Ptelea in GERANIALES 209 



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 PARIETALES 222 

 Stipules between the opposite and compound leaves 



(caducous) Staphylea in SAPINDALES 217 



Stipules none when the leaves are opposite. 



Stamens 10, monadelphous at base ; leaflets 3, 

 inversely heart-shaped. 



OxALis in GERANIALES 207 

 Stamens distinct, free from calyx. 

 Style 1, undivided. 



Ericaceae in ERICALES* 244 

 Styles 2-5, separate. 



C'aryophyt.laceae in CHENOPODIALES 132 

 Stamens distinct, inserted on the calyx. 



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



Saxifragaceae ii^r ROSALES 167 

 Style 1 ; pod in the calvx 1-celled. 



Lythraceae in MYRTALES 230 



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



Tendril-bearing and often succulent herbs. 



Cucurbitaceae in CAMPANULALES* 305 

 Not tendril-bearing. 



