*>h. A.V.J I.INNt.t]8 CLASSIFICATION O* ' fafttc-Ahi 9. 87 



350. 1st. Valves, are the pieces, which fojm the sides o/ 

 the seed vessels. If a pericarp is funned of one piece, it i? 

 nnicalced ; the chestnut is of this kind. A pericarp with two 

 valves is said to be biralced. as a pea pod. The pericarp of the 

 Violet is trivalved, that of the Stramonium quadrivalced. 

 Most valves separate easily when the fruit is ripe; this separa- 

 tion is known by the term dehiscence. 



2d. Sutures or seams, are lines which show the union of 

 valves ; at their seams the valves separate in the mature stage 

 of the plant. 



3d. .Partitions or dissepiments, are internal membranes 

 which divide the pericarp into different cells; these are longi- 

 tudinal when they extend from the base to the summit of the 

 nericarp ; they are transverse when they extend from one side 

 to the oilier. 



351. Column or columella, the axis of the fruit ; this is th 

 central point of union of the partitions of the seed vessels ; it 

 may be seen distinctly in the core of an apple. This was 

 noticed under the head of receptacles ; it is the receptacle of the 

 fruit. 



352. 4th. Cells, are divisions made by the dissepiment* 

 and contain the seeds ; their number is seldom variable in tht 

 same genus of plants, and therefore serves as an important 

 generic distinction. 



353. 5th. Receptacle, is that part of the pericarp to which 

 the seed remains attached until its perfect maturity ; this organ, 

 by means of connecting fibres, conveys to the seed for its nour- 

 ishment, juices elaborated by the pericarp. 



354. Some plants are destitute of a pericarp, as in the labi- 

 ate flowers, the compound flowers, and the grasses; in these 

 cases the seeds lie in the bottom of the calyx, which penorms 

 the office of a pericarp. 



Linnceus* Classification of Pericarps. 



355. Linnaeus divided pericarps into the nine following 

 classes ; Capsule, Silique, Legume, Follicle, -Drupe, Nut, 

 Pome, Berry, and Strobilum. 



356. CAPSULE, signifies a little chest or casket ; that is a 



350. Describe each of these parts. 



351. What is the column 7 

 35-2. What are cells 1 



353. What is the receptacle 7 



354. Are any plants destitute of a pericarp? 



355. What is Linnaeus' division or pericarps 1 

 35G. What is a capsule ? 



