THALAMIFLOR^l. 9 



Flowers small and white. Pods in a loose cluster. Common in 

 the neighbourhood of Torquay. (E. B. t. 492.) A. iii.-vm. 



NASTURTIUM. WATER-CRESS, YELLOW-CKESS. 



1. N. officinale (common Water-Cress.) Brooks and rivulets, 

 widely distributed. Stem much branched, creeping or floating in 

 the water. Radical leaves large, of from 5 to 7 distant leaflets, 

 the terminal one broad and rounded; stem-leaves with the leaflets 

 smaller and much closer together, ovate or linear-oblong, but the 

 end leaflet always largest and rounded. Flowers small and white. 

 Seed-pods on spreading footstalks, curving slightly upwards. 

 Much esteemed as a salad. Brooks and streams in the neigh- 

 bourhood. (E. B. t. 855.) P. v.-x. 



2. N. sylvestre (creeping Yellow- Cress) In wet places and 

 on riverbanks. Plant with a creeping stem and ascending flower- 

 ing branches. Leaves deeply pinnate ; leaflets lanceolate and cut, 

 the leaflets of the upper leaves however much narrower and en- 

 tire. Flower-etem angularly waved ; flowers small and yellow. 

 Pod smaller and more slender than that of the common Water- 

 Cress. Bovey stream, by Woodford Bridge, FL D. Sisymbrium, 

 Linn. (E. B. t. 2324.) P. vi.-vm. 



3. N. terrestre (marsh Yellow- Cress.) In muddy and watery 

 places. Resembles the last, but not so tall and more slender ; the 

 leaves have broader lobes and rather more toothed ; flowers and 

 pods both smaller. Side of the river at Exwick, Fl. D. Sisym- 

 brium, Linn. (E. B. t, 1747.) A. vi.-x. 



TRIBE II. 

 ARIVTORACIA. HORSE-RADISH, WATER-RADISH. 



1. A. amphibia (great Water-Radish) In moist meadows 

 and sides of rivers. Plant rising 2 or 3 feet high. Leaves ob- 

 long, pointed ar.d deeply serrate. Flowers yellow, with petals 

 much longer than the calyx. Seed -pouch oval. River Exe, near 

 the village of Wear, Fl. D. Sisymbrium, Linn. (E. B. t. 1840.) 

 P. vn.-viii. 



2. A. rusticana (common Horse-Radish) Waste places and 

 pastures. A well-known plant, but generally the outcast from 

 gardens. Many places about Torquay. Cochlearia armoracia, 

 Linn. (E. B. t. 2323.) P. v. 



