310 APPENDIX I 



Cells, the ultimate units of which plant tissues are built up 



(p. 8). 

 Cell Sap, the watery contents of the cell. 

 Chalk-gland, a glandular tissue secreting water and calcium 



carbonate (p. 76). 

 Chlorophyll, the green colouring matter of plants. It is 



generally localised in special granules within the cells, 



known as chlorophyll corpuscles or Chloroplasts (p. 10). 

 Chromoplasts, special portions of the protoplasm containing 



colouring matter (p. 45). 

 Cla-w, the narrowed base of the petal. 

 Cleistogamous, flowers which never open, and which are self- 



fertihsed (p. 278). 

 Cohesion, the union of similar parts of the flower, such as the 



union of all the petals ; cf. Adhesion. 

 Cone, as applied to the Coniferae, the fertile shoots, bearing 



spirally arranged scales subtending carpels or bearing the 



pollen sacs (p. 235). 

 Coniferee, the group of plants, including the Pines and Firs, 



which bear fertile shoots or cones {q.v.) of a special type. 

 Connective, the part of the stalk or filament of the stamen 



connecting the two pairs of pollen sacs. 

 Contractile Roots, special roots which pull the stem down into 



the soil (p. 122). 

 Corm, or solid bulb, is a modified swollen underground stem 



which serves as a storehouse for reserve food material. It 



is often covered externally with scale-leaves (pp. 153, 166). 

 Corolla, the petals of a flower considered as a whole ; the inner 



series of a diff*erentiated floral envelope, usually white or 



coloured. 

 Corona, an outgrowth from the corolla or perianth — e.g., the 



"trumpet "of a Daffodil. 

 Cotyledon, the first or one of the first pair of seed-leaves 



produced by a young seedling plant (p. 83). 



