SYNOPTICAL KEY. 3 



M- -M. Flowers regular: leaves without stipules. 

 Sepals and petals 5,: styles 3, 2-parted: capsule 3-valved, many seeded. 



Low herbs with the leaves all radical. Droseracex. 



Sepals and petals 5: stamens indefinite: styles 3: capsule 3-valved. Low 

 herbs with opposite leaves. Hypericum in Hypericacex. 

 *** Ovary of 2-several carpels and central placentae: stamens most- 

 ly strictly hypogynous: sepals persistent. 



H- Flowers very irregular, 



10 Polygalaceae. Capsule compressed, narrowly winged, 2-celled, 2-seed- 



ed : stamens 4-8, monadelphoup (united into a tube that is split on the 

 upper side), or distinct: anthers 1-celled, opening at the top. 

 -- -*- Flowers regular: capsule 2-celled with free central placentas: 

 embryo curved around central albumen. 



11 Caryophyllaceae. Flowers mostly 5-merous ; petals sometimes none : 



stamens 10 or fewer : styles 3-5, the capsuje opening by as many or 

 twice as many valves : ovules numerous. Herbs, rarely woody at base, 

 with opposite leaves mostly without stipules. 



12 Portulacaceae. Sepals 2, 4-8 in Lewisia : petals 2-5 or more : stamens 



few-many : style 2-cleft : ovules few or many ; capsule 2-3-valved or cir- 

 cumscissile. 



----- Flowers regular: ovary 2-several celled. 



-n- Capsule not lobed nor winged. 

 = Stamens distinct or nearly so, not in fascicles. 



Sepals and petals 5, persistent: stamens many: -style 5-lobed: capsule 5- 

 celled, 5-valved, many-seeded. Acaulescent marsh perennials with 

 pitcher -shaped leaves and solitary flowers. Sarrawniacex. 



13 Elatiniuceae. Sepals and petals 2-5: styles distinct: capsule 2-5-celled, 



many-ovuled. Low herbs with opposite leaves, membranous stipules, 

 and axillary flowers. 



= = Stamens clustered at base into fascicles. 



14 Hypericaceae. Sepals and petals 5 : stamens numerous, in 3 fascicles : 



styles 3: capsule 3-celled, many-seeded. Herbs with opposite entire 

 leaves without stipules, and yellow flowers in cymes. 



= = = Stamens monadelphous (united into a tube) . 



15 Malvaceae. Calyx valvate : petals 5, united at base : stamens numer- 



ous ; anthers 1-celled : carpels either in a ring 1-few-seeded and at length 

 separating, or forming a 5-10-celled many-seeded capsule. Herbs or 

 shrubs with alternate stipulate leaves. 



= = = = Stamens 5, not united. 



16 Linaceae. Flowers 5-merous : styles 2-5 : capsule 2-5-valved, 4-10-cell- 



ed, 4-10, seeded. Low herbs with entire leaves and panicled flowers. 

 Flowers 5-merous: petals none: styles 3: capsule 3-celled, several-seeded. 

 Prostrate annual with entire verticillate leaves and axillary flowers. 

 Mollugo in Ficoidece. 



++ -M- Fruit lobed or winged: ovules 1 or 2 in each cell, pendulous. 

 = Flowers slightly irregular. 



17 (xeraniaceae. Sepals 5, imbricated in the bud : petals 5, mostly imbri- 



cated : stamens mostly 10 : styles 5, coherent to an axis at length separ- 

 ating from it: capsule 5-celled, the cells 2-ovuled but only 1 maturing. 

 Herbs with opposite stipulate leaves and long-beaked carpels. 

 = = Flowers regular. 



18 Limnanthaceae. Flowers 5-merous.: sepals valvate and petals convo- 



lute in the bud: carpels fleshy, indehiscent, 1-ovuled. Tender annuals 



