270 CLASS XV. ORDER II. 



the seeds, it appears two celled. The seeds however are con- 

 tained between the laminae of the apparent partition. 



292. CARDAMINE. 

 Cardamine bellidifolia. L. Round leaved Cardamine. 



Leaves simple, fleshy, subovate, entire ; stems sim- 

 ple, weak, procumbent, pedicels filiform. 

 Syn. Cardamine rotundifolia. 2d Edit. 



Csespitose. Stems ascending, branched. Leaves ovate, ob- 

 tuse, submucronated, smooth, on long petioles. Flowers fasci- 

 cled or corymbed. Calyx leaves oblong, obtuse, spreading. Pe- 

 tals oval, subacute. Filaments subulate, hollow above. Capsule 

 linear. — On the highest summit of the Wiiite mountains. — July. 



Cardamine Pennsylvanica. Muhl. American Water 



Cress. 



Smooth, branching; leaves pinnate, leafets roitnd- 

 ish-oblong, obtuse, angular, toothed; siliqttes erect. 



Found in brooks and ponds, growing under water, except its 

 upper leaves and flowers. Leaves alternate, smooth, pinnate ; 

 leafets oblong, rounded at the end, with a few large teeth on 

 each side, the terminal leafet much exceeding the rest in size. 

 The leafets in the upper leaves are entire. Flowers small, 

 white. Pods narrow, erect, an inch or more in length. — 

 Brighton. — I\Iay. 

 Cardamine Virginica ? L. Virginian Cress. 



Smooth erect ; leaves pinnate, leafets spatulate, 

 obtuse; siliques erect. 



Found on dry hills, much smaller than the preceding. Leafets 

 oblanceolate, lov/er ones obovate, some of them with a tooth on 

 one side ; ciliate under a magnifier. Flowers white. — May. 



293. SYSYMBRIUM. 

 Sisymbrium ampiiibium. L. Amphibious Cress. 



Siliques declined, oblong-ovate ; leaves oblong-lan- 

 ceolale or pinnatifid, serrate ; petals larger than the 

 calyx. 



