EXPLANATION OF THE PLATES. Ixxxvii 



Fig. 180. The embryo separated from the interior of the albumen. 

 a. the radicle, h. h. the cotyledons, c. the gemmule. 



18L The embryo of 182, (Canna indica,) separated: a. the 

 cotyledon, h. the gemmule enclosed in the cotyledon, 

 which in growing, pierces the cotyledon laterally, and 

 becomes h ; c. the radicle enclosed in the coleorhizon, 

 (root-sheath,) which it must pierce at c, in order to 

 sink into the earth. 



182. A seed of the Indian shot, (Canna indica,) cut length- 



ways : a. its episperm. h. its endosperm, c. its niono- 

 cotyledorwus embryo. 



183. Triticum sativum, (wheat,) its monocotyledonous embryo 



being laid bare. 



184. Two incumbent cotyledons, and rootlet, (radicle.) Bx. 



185. Section of incumbent cotyledons, and rootlet, (radicle.) 



Bx. 



186. 187. Two accumbent cotyledons, and rootlet. 187. 



Section of the same. Bx. See Fig. 189, and 191. 



188. Dog-rose, (rosa canina,) several parietal ovaries attached 



to the side or (wall) of a monosepalous, pitcher-shaped, 

 (urceolate,) calyx. 



189. 191. Two-folded incumbent cotyledons, and rootlet. 



191. Section of the same. Bx. 



190. Hypogynous stamens, that is, inferior, inserted beneath 



the germen. (See Fig. 193, 194, 195, and 197.) 



191. (See back.) 



192. A kidney-bean, which has germinated : a. the radicle. 



h. b. the two cotyledons, which are become seminal, 

 (seed,) leaves, c. the stem. d. d. the leaflets of the 

 gemmule, forming the two (first) or primordial leaves. 



193. Perigynoua stamens, borne by the calyx. 



194. and 197. Perigynous stamens, borne by the corolla. 



195. Epigynons stamens, that is, stamens inserted above the 



germen, (in the common snow-drop,) Cralanthus 

 nivalis. 



196. From Lindley ; " a. Plants that have but one cotyledon, 



or if two, then the cotyledons alternate with each other, 

 are called Monocotyledonous." 



196.*Strap-shaped, (ligulate,) floret of a compound flowei% 

 196*, the strap-shaped corolla. /. the germen. g. 

 the anthers forming a hollow cylinder, through which 

 the pistil passes, with two reflected stigmas. 



197. See back, under fig. 194. 



198. Pericarp with /ocw/ic2c?a/ dehiscence, (opening.) SeeLind- 



