250 PARASITISM OF CUSCUTA AND OROBANCHE, ETC. 
siate of potass into their tissue from stocks impregnated 
by that liquid, is of very limited value, for it is not to be 
doubted, but that the suckers of these plants are equally 
endowed with that property of detection, which we know to 
be possessed by the ordinary form of roots. 
n an abstract of a paper read by Mr. Bowman on a 
supposed new species of Dodder, indigenous to England, and 
called by him C. Epilina, there are some passages which 
require remark. It is doubtful perhaps whether a mere 
superabundance of juice, constituting succulence, can be 
a source of nourishment to any neighbouring part, the chief 
growth of which takes place at a time when the ordinary sup- 
plies are much diminished. 
In all the most conspicuous instances of the presence of 
reservoirs of nourishment, it is in the shape of fecula or p 
laceous granules that it is to be found. 
No plant directly elaborates its juice from the soil, the 
generality draw their supplies directly from this source ; but 
the elaboration is a subsequent function. 
The last part of the abstract alluded to is a decided error: 
green colour is neither dependent on the presence of stomata, 
nor strange to say of light, (many embryos are igre: ) Hun- 
dreds of plants exist, which present saturated green colour. ', but 
have no stomata: of this, water plants and the! leaves of mosses 
are instances. 
The presence of stomata may depend on the thickness of 
the layers of cells containing green globules: in mosses the 
leaves consist of a simple series of cells, but the base of the 
apophysis, which has in its younger state a dense groen paren- 
chyma, has stomata. 

Additional Note on the Development of the Flower. 
SiNAPIS.—PrATE 62.—Fice, 11.. 
—Represents the young ovarium of Sinapis; it has four 
a. 
distinct equal undulations at the points, and the lines pointing 
out the future placente are four. 
