264 NATURAL SYSTEM OF Jl/SSIEU. 



albumen, afford characters remarkably constant, and 

 abundantly adequate to the purposes of arrangement. 

 By attending to these, Jussieu has subdivided one of 

 the most extensive classes in his system, into orders 

 which are usually well defined, and in most cases strict- 

 ly natural. 



1. Ranunculacece. — Stamens indeterminate. Anthers 

 adnate. Germens numerous. Embryo minute, 

 placed at the summit of the corneous albumen. 

 Leaves generally simple and palmate or lobed. 

 Anemone, Ranunculus and Clematis are examples. 



2. Papavaraceai. — Calyx usually two-leaved, decidu- 

 ous. Petals four. Germen simple. Stigma sessile. 

 Capsule one-celled, polyspermous. Seeds attached 

 to a lateral receptacle, each partially invested by a 

 membranaceous covering. Argemone, Papaver, and 

 Sanguinaria, are examples. 



'3. Cruciferce. — Calyx of four leaves. Petals four, cru- 

 ciform, and alternating wiih the leaves of the calyx. 

 Stamens six, two short. Style persistent. Fruit a 

 silique. Seeds without albumen. Lunaria, Chei- 

 ranthus, and Thlaspi, are examples. 



4. Capparides. — Germen simple. Fruit a berry or si- 

 lique. Seeds attached to the sides of the fruit. Em- 

 bryo without albumen, radicle curved. Leaves 

 alternate. Cleorne and Parnassia are examples. 



5. Sapindi. — Petals four or five, inserted into a disc 

 beneath the germen. Stamens usually eight. Fruit 

 a drupe or capsule, with two or three monospermous 

 cells. Embryo without albumen. Lobes incurved. 

 Cardiospermum and Sapindus are examples. 



6. Acera. — Petals and stamens inserted into a glandular 

 disc beneath the germen. Fruit a many celled cap- 

 sule, or two or three monospermous capsules, united 



