PLATE XIX. 



Fig. 



1. Lonicera conjugalis (species of Honeysuckle). As- 



cidium springing from the lower surface of the leaf 

 and representing its greater part. 1 a., front view. 

 lb., side view. Is, lower surface of leaf ; us, upper 

 surface. (Original.) p. 197. 



2. Phlox paniculata. Naked midrib borne on lower 



surface of leaf. 2 a. front view. 2 b. side view. 

 (Original.) p. 198. 



3. Syncotyly. 3a. Eremostachys laciniata (Desert-Rod). 



Normal seedling. 3 b. Abnormal seedling of the 

 same. (Original.) 3 c. Salvia amplexicaulis (species 

 of Sage). (Original.) 3 d. Mercurialis annua 

 (Annual Dog's Mercury). (After De Vries.) 3 e. 

 Raphanus Raphanistrum (Jointed Charlock.) Coty- 

 ledons united by both margins. (After De Yries.) 

 pp. 214-215. 



4. Schizocotyly. Acer Pseudo-platanus (Sycamore). 



Seedlings. 4 a. One of the cotyledons forked.. 46. A 

 further stage, in which three cotyledons are formed; 

 of the three corresponding plumular leaves one is 

 an ascidium, and is inserted lower on the axis than 

 the other two. 4 c. Final stage, in which four coty- 

 ledons are formed. (All original.) p. 215. 



