6 KEY TO ORDERS. 



Subkingdom I. 



Class I. 

 COHORT I. APOPETALOUS DICOTYLEDONOUS ANGIOSPERMS. 



Herbaceous Plants. 

 Calyx and corolla present. 



Stems sometimes climbing. Leaves alternate, or opposite, 2-3-ternately com- 

 pound, or merely lobed. Flowers regular. 



Ranunculaceae. 



Stems bifid. Leaves peltate. Sepals falling. Valves of anthers not opening 

 upwards. Flowers regular. 



Podophyllum in Berberidaceae. 



With milky juice. Sepals falling. Ovary compound, l-celled, several placentae 

 on wall. Flowers regular. 



Papaveraceae. 



Stems simple or branched above. Leaves alternate. Flowers regular, 5-merous. 

 Fruit a loculicidal 10-seeded capsule. 



Linacese. 



With stems. Leaves alternate, stipulate. Sepals 5. Petals 5, differing in size 

 and shape, one terminating in a spur. Flowers irregular. 



Violaceae, 



Without stems. Leaves all radical. Petals and sepals 5, one petal ending in a 

 spur. Flowers irregular. 



Viqlaceae. 



Leaves alternate. Flowers cruciform, regular. Sepals 4, falling. Petals 4, 

 hypogynous. Stamens 6, 2 shorter. Fruit a 2-celled pod. 



Crueiferse. 



Stems prostrate, creeping, or clambering. Flowers sympetalous, monoecious or 

 dioecious. Limb of calyx and corolla 5-lobed. Fruit a Pepo. 



Cucurbitaceae. 



Leaves alternate. Flowers in umbels. Stamens 5, styles 2. Fruit dry, dividing 

 into halves when ripe. 



Umbelliferae. 

 Shrubs. 



Calyx and corolla present. 



Leaves alternate. Sepals and petals .5-merous ; sepals imbricate. Stamens 



many. Fruit a berry. 



Bixineae. 



Leaves alternate. Calyx free, involucelled, 5-lobed. Corolla .5-merous. Sta- 

 mens many, monadelphous, attached to the petals. Pistils several, ovaries in a ring 



around an axis. 



Malvaceae. 



Tn regions of little frost. Leaves alternate, palmate. Sepals 4-8, free or cohe- 

 rent. Petals 4-8. Flowers regular, cruciform. 



Capparidaceae. 



With watery juice, climbing by tendrils. Stamens same in number as petals 

 and opposite to them. Calyx lobes very small or wanting. Petals valvate. 



Ampelideae. 



