DESCRIPTION OF THE PLATES. 331 



PLATE IX. 



Leaves. 

 Fig. 



1. Leaf or portion of the stem of an Indian Arum, showing the sheathing petiole 



and pedalinerved limb. 



2. Leaf of Liquidambar Styraciflua ; an example of a paimatifid, palminerved limb, 



with serrated lobes. 



PLATE X. 



Leaves. 

 Fig. 



1. Leaf of Ocotia Guianensis, showing the false nerves or marks caused by the 



pressure of neighbouring nerves during its infancy; an example of an ohlong 

 leaf, pointed at both ends, slightly penninerved, with reticulated lateral nerves, 

 and entire margins. 



2. Leaf of Begonia Arlicula/ri, the joints being formed by the dilation of the 



winged petioles, the leaflets which ought to spring from the contractions being 

 entirely wanting. 



3. Leaf of Desmodium triquetrum, with two stipules and a winged petiole, termi- 



nated by a single leaflet. 



4. Leaf of Sarcophyllum carnnsum, composed of a petiole and terminal leaflet. 



5. Different states of the leaves of Lebeckia nuda, showing the petiole furnished 



with rudiments of leaflets. 



PLATE XL 



Leaves. 

 Fig. 



1. Leaf of Bauhinia purpurea, probably formed by the constant union of two 



leaflets. 



2. Leaf of Passifttra perfoliata, emarginated at the base. 



3. Leaf and stipules of Lardizabala irilernata, which had better be called biternala. 



An example of foliaceous, caulinary, caducous stipules. 



PLATE XII. 



Buds of the Horse-chestnut. 



Fig. 



1. A young branch with the buds as yet undeveloped, and with lenticils and cica- 



trices of the old leaves. 



2. 3, 4 and 5. The buds more developed, showing the progression from the scales 



to the leaves, proving the scales to be petiolaceous. 



PLATE XIII. 



Leaves. 



Fig. 

 1. Leaf of Desmodium gyrans, showing the three leaflets and the stipels. 

 2 and 2*. Leaves of Mimosa sensiliva. 



3. Leaf of Melianthus cosmous, showing the stipules. 



4. Leaf of Melianthus major, showing the great interpetiolary stipules, with a longi- 



tudinal line through their centre, proving that they are formed by the union of 

 two. 



