PREFACE. CHAT] 
mentioned with the stamens perigynous: but these anomalies are not 
more exceptionable than in the Linnean system, where genera meet at 
every step containing species with a very variable number of stamina 
. and pistilla, and which therefore ought strietly to be inserted in widely 
different classes and orders. We shall depart also from De Candolle's 
views in another respect, and retain the Cryptogamous vegetables as an 
entire division. The following is a sketch of the arrangement we have 
adopted in the present work. 
A. DICOTYLEDONES, Jussieu.—ExocEN, De Candolle. 
I. THALMIFLORJE, DC.—Cl. 1. Hypopetale, Juss. 
I]. CALYCIFLOR&, DC. 
Cl. 2. Peripetale, Juss. 
3. Epipetale, Juss. 
4. Epicorolle corisantheree, Juss. 
5. Epicorolle synantherz, Juss. 
6. Pericorolle, Juss. 
HI. COROLLIFLORJE, DC.—Cl. 7. Hypocorolle, Juss. 
IV. MONOCHLAMYDE, DC. 
Cl. 8. Hypostaminese, Juss. 
9. Peristaminese, Juss. 
10. Epistaminese, Juss. 
§ 1. Angiosperme. 
11. Diclines, Juss. $2. Gynon: 
B. MONOCOTYLEDONES, Juss.—Enpocena PuawERocAM, DO. —— 
Cl. 12. Monoepigyneæ, Juss. 
13. Monoperigynæ, Juss. 
14. Monohypogynæ, Juss. 
* 
C*. Cl. 15. ACOTYLEDONES, Juss. 
$ 1. Ductulosee, Arn.—Endogenæ Cryptogame, DC. 
$ 2. Eductulose, Arn.—Cellulares, DC. 
- 
.. * Between the Monocotyledones and Acotyledones, Schott and Endlicher have lately in- 
stituted a fourth division, under the name of Rhizanthew, to comprehend those parasitical 
plants which have a truly cellular stem and a homogeneous seed, but at the same time flow- 
ers with stamens and pistils. This group has been admitted by Mr Lindley im his Nixus - 
E Plantarum. Some of the genera belonging to it have however, although the stem be cel- 
É lular, bracteas with a structure similar to the Dicotyledones, and, on the other hand, seve- 
ral plants which no one would think of removing from the Dicotyledones, as Eugenia and 
Penea, have the cotyledones conferruminated, or, in other words, the seed perfectly simple 
. 8s in the Acotyledones, ; 
