230 Orobanche uniflora. 
One species of this genus has already been figured and described 
in this work, under the name of Cancer-root; and a second is now 
noticed for reasons presently to be given. 
This little plant, like its congener just alluded to, is a leafless para- 
site on the roots of trees and shrubs. It is above a span high, several 
scapes proceeding from the same root. The root is gibbous or irre- 
gularly knobby, and sheathing the scapes at their origin from it. It 
is of a yellowish colour. The scapes are tortuous and round, about 
the thickness of bobbin, and finely pubescent every where, but espe- 
cially towards the upper part; and ofa delicate yellowish-white hue, 
almost imperceptibly tinged with pink near the flower. ‘The flowers 
are secund, or leaning towards one side, snow-white, consisting of a 
recurved monopetalous corolla, and a five-leaved ebracteate calix, also 
white, both finely and densely pubescent. The corolla is divided into 
ovate, obtuse segments, on the lower of which, two yellow diverging 
nectaries are perceptible, adding a little relief to the white flower. 
The filaments of the stamens are white, and the anthers yellowish. 
The germ is ovate, glabrous, and of a tan-colour. This singular little 
plant delights in very shady situations in rich woods, and has but a 
very slight attachment by its root, to the substance on which it grows; 
it is in flower about the beginning or middle of May, and soon fades 
when culled. Itis, when somewhat advanced, of a yellowish hue, but I 
have always found the plant in its fresh state, of the colour described 
above. Pursh mentions that it is but two or three inches high, of a 
tan-colour, and the flowers pale-purple. This is much smaller than 
