EXPLANATION OP THE PLATES. 



the base of the stem ; c. the runner ; d. the embryon bulb ; 

 e. the place where the runner of the adult bulb has sepa- 

 rated ; g. roots, (p. 176). 



Fig. 7. A scale of a bulb of Lilium pomponium: a.b. two young 

 bulbs formed on it. (p. 176). 



8. A portion of a scale of Lilium superbum, with a bulb formed 



on its margin; a. root of the young bulb. (p. 176). 



9. Congregated bulbs of Saxifraga granulata ; a. the bases of 



the leaves and stem. 



10. a. The plantule taken from a bulb of fig. 9. ; b. the plantule 

 in a state of vegetation, (p. 178). 



PLATE III. (in two parts.) 



1. A transverse section of the bulb of Narcissus Jonquilla : 



a. a. two young bulbs rising between the second and third 

 layers ; b. the roots protruded from the radical plate which 

 is hid by the position of the bulb. (p. 180). 



2. A bulb of Allium victorialis: a. the outer layer of the bulb 



extended into the sheathing stem ; b. the reticulated layers ; 



c. the caudex; d. d. the roots, (p. 182). 



3. A vertical section of the bulb, fig. 2. ; a. the succulent layers 



extending into the stem ; b. the old reticulated layers ; c. 

 the caudex ; d. d. the young bulbs, (p. 183). 



4. A tulip bulb : a. a portion of the flower stalk ; b. the new 



flower bulb ; c. c. the exterior tunic of the exhausted bulb ; 



d. a lateral leaf bulb. (p. 182). 



5. Transverse section of a tulip bulb ; a. the base of the flower 



stalk ; b. remains of the layers of the exhausted bulb ; e. 

 the new bulb. (p. 180). 



6. (Middle of the plate.) Longitudinal section of a tulip bulb; 



a. the flower stem ; b. b. b. tunics of the exhausted bulb : c. 

 the young flower bulb in its tunic d. d. d. ; e. the point of 

 conjunction of the new bulb, with the parent, (p. 182). 



6, 7. Bulbs of Hyacinthus orienialis: a. the body of the bulb; 



b. the manner in which the layers overlap one another ; c. 



b3 



