KEY TO THE FAIVIILIES 7 



Calyx irregular, one of the 

 sepals spurred or saccate; 

 anthers united around the 

 stigma. 



69. Balsaminaceae 53G 

 Calyx regular; none of the 



sepals saccate; anthers 

 distinct. 

 Stjie basal, arising between 

 the nearly distinct lobes 

 of the ovary; leaves odd- 

 pinnate. 



70. Ltmnanthaceae 537 

 Styles not basal; leaves In 



ours abruptly pinnate, or 

 digitate. 



71. Zygophylxaceae 538 



** Stamens inserted on the margin of a disk or hypanthium (perigy- 

 nous or hypogynous). 



Styles and upper part of the ovaries distinct^ 



•' i I t- ^^ SAXIFRAGACEAE 37b 



styles united. , , -^ j.v. 



Stamens as many as the petals and opposite them. 



Fruit a samara. 78. Aceraceae 551 



Fruit a berry, drupe, or capsule. 



Sepals manifest; petals involute; fruit capsular or dru- 

 paceous; ours shrubs or trees. r-o 

 79. RhamnaceaE 553 

 Sepals minute or obsolete; petals valvate; fruit a berry; 



ours vines with tendrUs. SO. Vitaceae 556 



Stamens as many as the petals and alternate with them, or 

 more. 

 Hypanthium flat or obsolete; disk fleshy. 



Styles united, arising in the center, between the nearly 

 distmct lobes of the ovary; small hydrophytic 

 plants. 70. Limnanthaceae 537 



Styles not arising between the ovaries; trees or shrubs. 

 Plants ^Ndthout secreting glands in the bark. 



Plants with resiniferous tissue; fruit drupaceous; 

 seeds without aril; leaves in oiu-s compound. 



77. AXAC'ARDIACEAE 550 



Plants without resiniferous tissue; fruit a loculic- 

 idal capsule; seed with a fleshy aril; leaves 

 simple. 76. Celastraceae 548 



Plants with secreting glands in the bark. 



72. RUTACEAE 539 



Hypantluum cup-shaped or campanulate; disk obsolete or 



inconspicuous. 90. LYTHRACEAE 582 



Ovary at least partly inferior. 



a. Stamens numerous. 



Ovary partly inferior. „„„.^t,.^ qqo 



Fruit a capsule. 58. Hydrangeaceae 392 



Fruit a pome. 61. Malaceae 445 



Ovary wholly inferior. , , , „ i 



Sepals and petals 4 or 5. very imhke each other; leaves ample. 



Trees or shrubs; fruit fleshy. 61. Malace.\e 445 



Herbs with rigid hairs; fruit capsular. 



87. Loasaceae 569 



Sepals and petals nearly alike, at least the latter numerous; 

 leaves tvpically and in aU ours mere scales or wantmg; sue- 

 culent plants armed with spines. 88. Cactaceae 57o 



b. Stamens not more than twice as many as the petals. 



Styles wanting; stigmas sessile. 92. Halorigid.\ceae 605 



Styles present. 



Plants without tendrils. 



Styles distinct. , , .. 



Ovules several in each cavity of the ovary; fruit a cap- 

 sule or a fleshy many-seeded berry. 

 Fruit, if deliiscent, valvate. 



Leaves opposite; fruit a leathery capsule. 



58. Hydrakgeaceae 392 

 Leaves alternate; fruit a berry. 



59. Grossulariaceae 394 

 Fruit circumscissile. 42. Portul-^caceae 262 



0\'nles solitary in each ca\aty of the ovary; fruit a 

 drupe or 2-5 more or less united achenes. 

 Fruit drupaceous or baccate; gjmoeciuin 1-several- 

 carpellary, if 2-carpeUary the stigmas introrse. 



