70 
REPORT ON BOTANY, MDCCCXLC : 
parasite, as in number 1, but with the addition of roots, which 
are prorided with papillae, which soon disappear ; Orohanche, 
Plielipaea, Chonopholis, Hyohanche, EpipJieagus, ^Eginetia^ 
and Oholaria. 7th, The bulb -shaped irregular substance, 
similar to a rhizom, from which the flower-stalks of these 
plants spring, consists of a bundle of intimately matted toge- 
ther root-fibres, which partly belong to the parasite, partly 
to the nourishing plant ; Monotropa liypopithys. 8th, The 
parasite developes itself independently, and only here and there 
occasionally shoots forth from the stalk into the nourishing 
plant ; Cuscuta cassytlia. 9th, Strongly ramified roots, which 
extend themselves both over and under the bark of the nourish- 
ing plant, and are in a manner infiltrated into the same ; 
Viscum^ LorantJms, Misodendron, &c., &c. 
The author has added many facts respecting the anatomy of 
these plants. Thick walled cells frequently occur in the form 
of bundles, which are longitudinally extended, and provided 
Avith partitions. The application of a strong magnifying glass 
distinctly exhibited thirteen layers in the Helosia hraziliensis, 
and even thirty layers could be distinguished in the Langs- 
dorfia hypogoea. The channels which cross through the 
layers in all directions, could also be distinctly perceived. 
These layers are very unequally deposited, and in such a man- 
ner, that one side appears free from deposit, whilst the other 
appears to have an accumulation of them. The vascular 
bundles of the RMzantliacem may be considered as remark- 
ably small and insignificant ; they consist of only two vessels, 
and the thick walled cells accompanying them. The vessels, 
Avithout exception, belong to the reticular, porous, and scalari- 
form vessels, never to the simple or ring-formed spiral vessels. 
In general, the vessels of the Rliizantliacece consist of short 
longitudinal tubes in the shape of a leather pipe, which are 
irregularly placed one above another, and are placed in con- 
tinuation with each other by the partial absorption of the 
intervening Avails. We also perceive in the vascular bundles, 
especially in the Cynomorium and Helosis, that a peculiar 
homogeneous matter, Avhich is soft and of a broAvn colour, is 
deposited in larger or smaller irregular bars and nets. The 
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