175 



2. MONOPETALOUS PLANTS. 



The character by which this division of Dicotyledons is distinguished from the 

 last (p. 2,), is the cohesion of the edges of the petals into a tube ; whence the 

 name Monopetalous, the petals forming together a single floral envelope. Ge- 

 nerally it is easy to recognise this character, and the orders thus distinguished 

 are individually perfectly natural ; but occasionally certain genera in Polype- 

 talous orders have flowers with a Monopetalous corolla, as in Crassulaceffi ; 

 these cases are, however, rare, and are to be considered exceptions to the rule. 

 For the most part, in Monopetalous plants belonging to Polypetalous orders, 

 the petals are readily separable from each other, which is not the case in 

 genuine Monopetalee ; but this is not always so. Apetalous exceptions are 

 exceedingly uncommon : Glaux, among Primulaceae, is a rare instance of 

 this. 



Monopetalous orders approach those which are Polypetalous, Apetalous, or 

 Achlamydeous, at many points besides such as are adverted to at p. 2, espe- 

 cially by Ilicineae, which are nearly allied to Rhamneae. 



LIST OF THE ORDERS. 



166. Ilicineae. 



167. Styraceae. 



168. Belvisiaceae. 



169. Sapoteae. 



170. Ericeae. 



171. Epacrideae. 



172. Vaccinieae. 



173. Pyrolaceaa. 



174. Campanulaceaa. 



175. Lobeliacese. 



176. Goodenoviae. 



177. Stylideae. 



178. Scaevoleae. 



179. Brunoniaceae. 



180. Papayaceae. 



181. Cucurbitaceae. 



182. Plantagineae. 



183. Plumbagineae. 



184. Dipsaceae. 



185. Valerianeae. 



186. Compositae. 



187. Calycereae. 



188. Globularineae. 



189. StellatK. 



190. Cinchonaceae. 



191. Caprifoliaceae. 



192. Lorantheae. 



193. Potaliaceas. 



194. Loganiaceae. 



195. Asclepiadea?. 



196. Apocyneas. 



197. Gentianeae. 



198. Spigeliaceaa. 



199. Convolvulaceae. 



200. Polemoniaceae. 



201. Hydroleaceae. 



202. Ebenaceae. 



203. Columelliaceae. 



204. Jasmineae. 



205. Oleaceae. 



206. Myrsineae. 



207. Primulaceae. 



208. Lentibulariae. 



209. Gesnereae. 



210. Orobancheae. 



211. Scrophularineae. 



212. Rhinanthaceae. 



213. Solaneae. 



214. Acanthaceae. 



215. Pedalineae. 



216. Cyrtandraceae. 



217. Bignoniaceae. 



218. Myoporineae. 



219. Selagineae. 



220. Verbenaceae. 



221. Labiatae. 



222. Boragineae. 



223. Heliotropiceae. 



224. Ehretiaceae. 



225. Cordiaceae. 



226. Hydrophylleae. 



CLXVI. ILICINEAE. The Holly Tribe. 



Ilicin-eje, Ad. Brongniart Memoire sur les Rhamnccs, p. 16. (1826) ; Lindl. Synops. p. 73. (1829.) 

 Aciuifoliace.e, Dec. Thcorie, ed. 1. 217. (1813); a sect, of Celastrinese, lb. Prodr. 2. 11. 

 (1825) ; Martius H. R. Mon. (1829.) 



Diagnosis. Monopetalous dicotyledons, with a superior 2-6-celled ovarium, 

 regular flowers, definite pendulous ovules, a 4-6-lobed corolla, with the sta- 

 mens equal to the number of its lobes, and albuminous seeds. 



