XXXIV SYNOPSIS OF GENERA. 



Order IV. Pentandria. Stamens 5. 



Humulus. Barr. fl. Cal. of 5 leave*. Cor. none. Anth. with 2 ter- 

 minal pores. Pert. fl. in a catkin. Cat. an oblique, undivided scale. Cor. 

 none. Styles 2. Seetf 1, tunicated, winged with the calyx. Urticea>, 

 p. 233. 



Order V. Octandria. Stamens 8. 



Rhobiot.a. Barr. fl. Cal. in 4 deep segments. Pet. 4. JVecf. 4, 

 notched. Pert. fl. Cal. Pet. Nect. the same. Pist. 4. Caps. 4, with 

 many seecfc. Crassidacea, see Addenda, p. 255. 



Populus. Barr. fl. Catkin imbricated. Cal. a torn scale. Cor. tur- 

 binate, oblique, undivided. Pert. fl. Catk. Cal. Cor. the same. Stigm. 4 

 or 8. Caps, superior, of 1 cell and 2 valves. Seeds tufted. Amentacex, 

 p. 253. 



Order VI. Enxeandria. Stamens 9. 



Mercurialis. Barr.fl. Cal. in 3 deep segments. Cor. none. Stam. 

 9 — lo. J nth. of 2 globose cells. Fert. fl. Cal. the same. Cor. none. 

 Stytes 2. CajJ5. of 2 lobes and 2 cells. Seeds solitary. Euphorbiaceaz, 

 p. 237. 



Hydrocharis. Barr.fl. Cal. 3-cleft. Pet. 3. TVmer jWam. beaked. 

 JVr/. ./?. Ca/. and Pe<. the same. . Styles 6. Caps, inferior, of 6 cells, with 

 many seeds. Hydrocharidece, p. 272. 

 (Ord. Decandria. See Silene and Lychnis in CI. X. — Ord. Icosandria. See 



Rubus and Fragaria in CI. XII. — Ord. Polyandria. See Stratioles in 



CI. xiii. See Populus in Ord. V.) 



Order VII. Monadelphia. Stamens combined. 



Juniperus. Barr.fl. Cal. scales of a catkin. Cor. none. Stawj. 3. 

 F<?r<. fl. Cal. scale of a catkin, fewer ; finally pulpy, united into a berry, 

 with 3 seeds. Coniferce, p. 259. 



Taxus. Barr.fl. Cal. none. Cor. none. ^n</i. peltate, lobed. Per*. 

 ./?. Ca/. cup- shaped, entire. Cor. none. Style 1. Seea" 1, enclosed in the 

 enlarged, pulpy, unconnected calyx. Coniferce, p. 259. 



Class XXIII. POLYGAMIA. 



Stamens and pistils separate or united, on the same or on different plants, and 

 having 2 different kinds of perianth. 



Order I. Moncecia. Flowers different on the same plant. 



Atriplex. United fl. Cal. inferior, in 5 deep segments. Cor. none. 

 Stam 5. Style deeply cloven. Seed 1, depressed. Fert. fl. Cnl. inferior, 

 in 2 deep segments. Cor. none. Style deeply cloven. Seed 1 , compressed. 

 Chenopodecs, p. 229. 



Class XXIV. Cryptogamia. (Part of.) 



* Stamens and pistils not visible. 



FlLICES. 



Obs. This order forms the Filicoidew, or Fern-like plants, Filices, p. 327. 

 — Lycopodiacea, p. 346. — Marsileaccee, p. 348. — Equisetacea, p. 348. 

 For Characece, see p. 351. 



