PREFACE. xxix 
cause that unites the petals often also makes part of the filaments adhere 
toit. Among the monopetalous plants, then, to prevent confusion, Jus- 
sieu, instead of saying that the stamens were hypogynous or perigynous, 
speaks of the insertion of the corolla; and, with these remarks, we may 
now present the fifteen classes of Jussieu. 
I.—COTYLEDONS none. 
Class 1. Acotyledones. 
II.—MONOCOTYLEDONFS. 
2. Monohypogyne, stamens hypogynous. 
3. Monoperigyne, stamens perigynous. 
4. Monoepigyne, stamens epigynous. 
III.—DICOTYLEDONES. 
$ 1. APETALÆ. 
. Epistaminee, stamens epigynous. 
. Peristaminee, stamens perigynous. 
. Hypostaminee, stamens hypogynous. 
* 
aI or 
$ 2. MoNorETALX. 
8. Hypocorolle, corolla hypogynous. 
9. Pericorolle, corolla perigynous. : 
10. Epicorolle synanthere, corolla epigynous, anthers united. 
11. Epicorolle corisanthera, corolla epigynous, anthers free. 
$ 3. POLYPETALÆ. 
12. Epipetale, stamens epigynous. 
18. Peripetale, stamens perigynous. 
14. Hypopetale, stamens hypogynous. 
$ 4. DICLINES. 
15. Diclines, flowers unisexual, or without a perianth. 
Such was the groundwork of the system which, though in some re- T 
spects artificial, was instantly perceived to bear the palm from all that pre- - - 
ceded it; and this, without any alteration, is still adhered to in France 
by many of the most eminent botanists. Jussieu originally prefixed 1 no 
names to his classes, and the want of this was much objected to.. Those 
which we have given have been lately proposed by Antoine L. de Jus- 
sieu in the Dictionnaire des Sciences Naturelles ; and, although not en- 
tirely in unison with the principles of the Greek language, may be 
adopted as extremely useful, each being so framed as to suggest the 
structure of the class. Thus the commencement Mono, indicates the 
Monocotyledones. .Epistaminee, &c. having in no part any allusion to a 
corolla, suggests its absence. Hypocorolle, and the others, allude to the — eos 
