KXVUl STOTOPSIS OP THE NATTJEAI OKDERS. 



9 Stamens as many as, or twice the number of the petals, 

 inserted at the hase of the calyx. No stipules. 



xxxiv. CrassulacecB. 



Stamens 20 or more, inserted on the calyx. Leaves 



with stipules xxvi. Rosacets (in part). 



10 Leaves with stipules H 



Leaves without stipules 12 



11 Stamens 10, mon- or diadelphoua . . xxv. Leguminosa. 



12 Stamens many free. Fruit of 1 or more follicles. 



i. ManunculacecB (in part). 

 Stamens 6, in two bundles v. Fumariacece. 



13 Corolla regular. Petals 4 14 



Corolla regular. Petals 5 15 



Corolla regular. Sepals and petals many, gradually 



passing into each other iii. Nymphaacea. 



CoroUa irregular 16 



14 Sepals 2. Stamens many iv. Fapaveracecs. 



Sepals 4. Stamens tetradynamous ... .vi. CrucifercB, 



16 Sepals equal, distinct, imbricate. Stamens 5. 



X. Droseracea. 

 Sepals distinct ; 3 inner twisted in the bud ; 2 outer 

 smaller or wanting. Stamens indefinite, many. 



viii. Cistacece. 

 Sepals equal, haore or less united below. Stamens as 

 many or twice as many as the petals, from a shield- 

 like disk xxviii. Tamariscacece. 



16 Leaves with stipules. Sepals 5. Stamens 5, free. 



ix. Violacecs. 



No stipules. Sepals 2 or wanting. Stamens 6, in two 



bundles. Ovary closed v. Fumariacece. 



17 Calyx imbricate in the bud 20 



Calyx valvate in the bud, or with distant lobes. Calyx 



and corolla regular 18 



18. Stamens united into a column xv. Mcdvaceis. 



Stamens free 19 



19 Stamens hypogynous xvi. Tiliacece. 



Stamens perigynous, opposite the petals and equalling 



them m number xxiv. Rhamnacea. 



Stamens inserted in the tube of the calyx, alternating 

 with, or twice as many as, but below the petals. 



xxvii. Jjythracecs. 



20 Corolla regular 21 



Corolla irregular xx. Bahaminacece. 



21 Calyx tubular xiv. Caryophyllaceis (SileneaB). 



Sepals distinct or slightly connected below 22 



22 Ovary 1-celled 23 



Ovary many-celled 25 



