18 ANALYTICAL KEV 



Calyx 5-lobed or of 5 equal sepals Saxifkagaceae, Hi 



Calyx of 3 equal or 5 very unequal sepalu Cistaceae, 57() 



A. Ovary'2-several-celled B. 

 B. Flowers irregular C. 

 C Anthers opening at the top. 



Anthers 6-8, 1-celled Poltgalaceae, 538 



Anthers 10, 2-celled Rhododendron, 631 



C. Anthers opening lengthwise. 



Stamens 12 and petals 6 on the throat of the gibbous calyx Ouphea, 59. 

 Stamens 5-10 and petals hypogynous or nearly so. 

 Ovary 3-celled ; trees or shrubs Aesculus, 559 



Ovary 5-celled ; herbs Balsaminaceae, .560 



B. Flowers regular or nearly so D. 



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

 petals. 

 Trees or shrubs. 

 Stamens fewer than the 4 petals Oleacbae, 650 



Stamens more numerous than the petals Aceeaceae, 557 



Herbs. 

 Petals 5 Hypericaceae, 571 



Petals i Crucifebae, 418 



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

 E. Ovules and seeds only 1 or 2 in each cell. 

 Herbs. 

 Flowers monoecious or dioecious Euphorbiaceae, 540 



Flowers perfect and symmetrical. 

 Cells of the ovary as many as the sepals. 

 Ovary 2-3-celled Limnanthaceae, 551 



Ovary 5-celled Gebaniaceae, 534 



Cells of the ovary twice as many as the sepals. 

 Leaves abruptly pinnate Zyqophyi,i.aceae, 536 



Leaves simple Linackae, 531 



Shrubs or trees. 

 Leaves compound. ' 



I.«aves 3-foliolate, punctate Pielea, 537 



Leaves pinnate, not punctate Sapindaceae, 559 



Leaves simple. 

 Leaves palmately veined Aceraceae, 557 



Leaves pinnately veined. 

 Leaves alternate. 

 Climbing shrub Celastrits, 55V 



Erect shrubs or trees. 

 Flowers racemose Cyrfllaceaf., 553 



Flowers solitary or cymose Aquefoliaceae, 554 



Leaves opposite Celastraceae, 556 



E. Ovules, and usually seeds, several or many in each cell F. 

 F. 'Leaves compound. i 



Tree or shrub Staphyleaceae, 557 



Herbs ; leaves alternate, or all radical. 

 Leaflets 3, obcordate Oxalidaceae, 532 



Leaflets more numerous, pointnl Astilbe, 444 



F. Leaves simple 



Stipules present between opposite leaves Elatinaceae, 575 



