x INTRODUCTION. 
; } ium is inferi i ith the tube of the calyx, stamens, 
istamineae here the ovarium is inferior cohering wi ie ; es, 
Ape ne limb, or superior, Santalum album, (Sandal-wood) and Aristolochia (Birth 
wort or snake-root) are well known examples of this section. 
4, Diclines Flowers unisexual or without a perianth; To this tribe are referred Euphor- 
ini i I shall refer 
ing portion of the system Monocotyledons and Acotyledons. 
for oe ce the i tables, the first exhibiting a Clavis of the system of Jussieu, the 
next, that system has modified by DeCandolle and adopted in our Prodromus. 
I.—COTYLEDONS none. A. DICOTYLEDONES, Jussieu.—Exocenm, DC. 
Class 1. Acotyledones. I, THALMIFLORE, DC.—Cl. 1. Hypopetalee, Juss. 
Il—MONOCOTYLEDONES. IL CALYCIFLOR EE, DC. 
2. Monohypogyne, stamens hypogynous. Cl. 2. Peripetale, Juss. 
3. Me joyne, stamens perigynous. 3. Epipetale, Juss. 
4, Monoepigyna, stamens epigynous. 4. Epicorolle corisantherze, Juss. 
5. Epicorolle synanthera, Juss. 
Ill.—DICOTYLEDONES. 6. Pericorolle, Juss. 
§ 1. Aperare. Ill. COROLLIFLORA, DC.—Cl. 7. Hypocorolle, Juss. 
5. Epistaminee, stamens epigynous. IV. MONOCHLAMYDES®, Dc. 
6. Peristaminee, stamens perigynous. ; 
7. Hypostaminee, stamens hypogynous. Cl. 8. Hypostaminem, Juss. 
: § 2. MonopetaLm. 9. Peristaminex, Juss. 
8. Hypocorolle, corolla hypogynous. 10. Epistaminee, Juss. : 
9. Pericorolle, corolla perigynous. 11. Diclines, Juss, § § !- Angiosperme. 
10. Epicorolle synanthere, corolla epigynous, an- ' ree" U§ 2. Gymmospermee. 
thers united. 
ll, Hotere corisanthere, corolla epigynous, an- B, MONOCOTYLEDONES, Juss.—Enpocenex Pna- 
“ao NEROGAMZ, DC. 
ok ener Cl. 12. Monoepigynee, Juss. 
12. Epipetale, stamens epigynous. 13. Monoperigyna, Juss. 
13. etale, stamens perigynous. 14, Monohypogyna, Juss. 
. stamens h us, 
eee Came Wypenye C. Cl. 15. ACOTYLEDONES, Juss. 
§ . Dicrings. 
§ 1. Ductulosse, Arn.—Endogene Cryptogame, DC. 
15. Diclines, flowers unisexual, or without a perianth. § 2. Eductulose, Arn.—Cellulares, DC. 
Of this system I have only further to observe that the three primary divisions Acotyle- 
dons, Monocotyledons, and Dicotyledons are strictly natural and must always be retained in 
every Botanical system professing to arrange plants according to their affinities. So much can- 
not be said for the classes: they rest with one exception on a single point of structure not in 
itself invariable, in the respective classes ; the insertion namely, of the stamens and petals, 
whether hypogynous or perigynous, points not always determinable without the aid of analogy. 
The secondary divisions according to which the classes are grouped under four sections are still 
more artificial and more liable to vary, and thence so much the less to be depended upon. Though 
to this extent artificial, this method of arranging the almost innumerable forms met with in the 
. 
