207 



2. F U M A R I A CAVA. 



HOLLOW-ROOTED FUMITORY. 



This genus contains plants of the tuberous-rooted low flowery 

 perennial kind. 



It belongs to the class and order Diadelphia Hexandria, and ranks 

 in the natural order of Co;;yrfa/es. 



The characters are: that the calyx is a two-leaved perianthium: 

 leaflets opposite, equal, lateral, erect, acute, small, deciduous: the 

 corolla oblong, tubular, ringent, palate prominent, closing the throat: 

 upper lip flat, obtuse, emarginate, reflex : the nectary the base of 

 the upper lip prominent backward, obtuse: the lower lip entirely 

 similar to the upper, keeled towards the base: nectary the keeled 

 base, but in this less prominent: the throat four-cornered, obtuse, 

 perpendicularly bifid: the stamina consist of two ecpial filaments, 

 broad, one within each lip, enclosed, acuminate: anthers tjuee at the 

 end of each filament: the pistillum is an oblong, compressed germ, 

 acuminate: style short: stigma orbiculate, erect, compressed: the 

 pericarj)ium is a one-celled silicle: the seeds are roundish. 



The species are: F. cucullaria.^ Naked-stalked Fumitory; 2. F. 

 sempervirens, Glaucous Fumitory ; 3. F. luteo, Yellow Fumitory ; 

 4. F. capnoides. White-flowered Fumitory. 



The first has a scaly root, the size of a large hazel-nut: the flower- 

 stalk is eight or nine inches high: the root-leaves are in pairs, triter- 

 nate, gashed, smooth, slender; with red petioles: the scape simple, 

 round, length of the leaf, rufous : the raceme terminating, simple ; 

 the flowers (four or five) pendulous; of a dull white colour. It is a 

 native of Virginia. Perennial, flowering in June and Jul}'. 



The second species is annual: the stem upright, a foot and half 

 liigh, round, and very smooth, sending out several branches at top: 

 the leaves smooth, branching, pale, divided like the common sort. 



