152 POPULAR FIELD BOTANY. 
several peculiarities. It grows on old walls and rocks in 
many places. Stems very long, trailing. Leaves heart- 
shaped, five-lobed, alternate, and smooth, often purple 
beneath. Flowers very pretty, small, pale purple and yellow. 
It is in flower all the summer, and therefore may easily be 
compared with the rest of the genus when they appear. 
— 
TETRADYNAMIA. SILICULOSA. 
THALAMIFLORA. CRUCIFERS. 
TEESDALIA. (Trxspatrta.) 
Generic Character. Pouch or seed-vessel with a notch at the 
top; the sides keeled like a boat. Two seeds in each cell. 
TEESDALIA NUDICAULIS. (Plate X. Fig. 38.) Naked- 
stalked Teesdalia. This pretty little plant is plentiful in 
some situations where sand or gravel prevail. I have found 
it abundantly on banks where the soil seemed composed of 
fine sand only. Stem not above four inches high, with 
sometimes one or two small leaves; the rest beimg almost 
entirely at the root, and much divided. Flowers very small 
and white, two of the petals being longer than the others. 
