7G HOW PLANTS ARE PROPAGATED. 



corolla." Fig. 105 Is tlie corolla of Morning-Glory laid open, to show the stamens 

 inserted on it, i. e. grown fast to it, towards the bottom. We may even have the 



Stamens inserted on the Style, that is, united with it even up to the stigma. It is 

 so in the Orchis family. 



218. Gymiiospermous or Open and Naked-seeded Pistils. This is the very peculiar 



pistil which belongs to Pines, Spruces, Cedars, and all that family of plants ; and it 

 is the simplest of all. For here the pistil is an open leaf or scale, bearing two or 

 three ovules on its upper or inner surface. Each scale of a Pine-cone is an open 

 pistil, and the ovules, instead of being enclosed in an ovary which forms a pod, are 



naked, and exposed to the pollen shed by the stamen-bearing 

 flowers, which falls directly upon them. Fig. 196 is a view 

 of the upper side of an open pistil or scale from a forming 

 Larch-cone, at flowering-time, showing the two ovules borne 

 on the face of it, one on each side near the bottom. Fig. 

 197 is the same grown larger, the ovules becoming seeds. 

 When ripe and dry, the scales turn back, and the naked 

 seeds peel off and fall away. 



219. Plants which have such open scales for pistils accordingly take the name of 

 Gymnospermous or Nahed-seeded. The Pine family is the principal example 



of the kind (see p. 201). All other Flowering plants are 



Angiospermous, that is, have their ovules and seeds produced in a seed-vessel 

 of some sort. 



Analysis of the Section. 



168. Arransrement of Flowei's, or Inflorescence. 169. Situation of Flower-buds : terminal and axil- 

 lary. 170. Solitary flowers. 171. Flower-clusters. 172. Bracts and Bractlets. 173, 174. Flower- 

 stalks: Peduncle and Pedicels. 175. Kinds of flower-clusters. 176. Eaceme; order of opening of the 

 blossoms. 177. Corymb. 178. Umbel. 179. Comparison with Eaceme, &c. 180. Head. 181. Com- 

 parison with the Umbel, and, 182. the Spike. 183. Catkin or Anient. 184. Spadix. 185. Its Spathe. 

 186. Involucre. 187. Compound Clusters: Umbellets; Involucel. 188. Panicle; Tliyrse. 189. Cyme. 

 190. Fascicle. 



191. Flowers: their parts illustrated by the Stonecrop: 192. A pattern flower, 193. Leaves of flower 

 or Perianth. 194. Petal; its Blade and Claw. 195. Stamen; its parts. 196. Pollen; its structure 

 and use. 197. Pistil ; its parts. 198. Nature of the flower; its parts answer to leaves. 198\ How a 

 stamen answers to a leaf. 199. How a pistil answers to a leaf : Placenta. 



200. Sorts of Flowers : one general plan : 291. Varied in several ways. 202. Complete flower. 

 203. Perfect flower. 204. Incomplete flower: apetalous; naked. 205. Imperfect or separated flowers : 

 staminate or sterile ; pistillate or fertile ; monoecious, dioecious, or polygamous. 206. Xeutral flowers. 



