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Tambo 
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| Special uM. 01 orphology phe i baciitsion 243 
XVII. 2. DIADELPHIA Geena. Polygala. 
XVII. 3. DIADELPHIA DeECANDRIA. Most Leguminose: 777- 
folium, Lotus, Vicia, &c. 
Class XVIII. POLYADELPHIA. /yfericum with 3 styles. 
Class XIX. is divided into the following orders :— 
I. SYNGENESIA ZQUALIA. Zaraxacum, Cichorium, Lactuca, Car- 
duus, Cnicus (Fig. 213, p. 117). | | 
2. SYNGENESIA SUPERFLUA. Artemisia, Aster, Anthemis, Bellis, 
(Fig. 214, p. 118). 
3. SYNGENESIA FRUSTRANEA. Centaurea (Fig. 203, p. 112). 
4. SYNGENESIA NECESSARIA. Calendula. 
s, SYNGENESIA SEGREGATA. Lchinops. (These two are not in- 
cluded in the English flora). 
These 5 orders together form the natural order Composite. 
In the 20th, 21st, and 22nd classes, the orders are again charac 
terised by the number and arrangement of the stamens. The following 
occur in the English flora :— wa 
XX. 1, Orchis, Ophrys, Epifactis; XX. 2, Cypripedium; XX. 6, 
Aristolochia; XXI.1, Euphorbia; XXI. 3, Sparganium, most Ca- 
vices; XX. 4, Alnus; XXI. 5, Letula, Fagus, Quercus; XXI.. 6, 
Pinus; XXIV. 2, Salix; XXII. 3, Empetrum, Ruscus; XXII. 4, 
Viscum; XXII. 5, Humulus; XXII. 6, Zamus; XXII. 7, Populus 5 
XXII. 8, Hydrocharis, Mercurialis; XXII. 12, Taxus. 
Class X XIII. comprises the order :— 
1. PoLyGAMIA MoNceclA. Alriplex. 
The 24th class Linnzeus divided, according to their natural relation- 
ships, mito 4 orders :—1. Filices ;~ Ferns... 2.. Musci.; “Mossesar 7%: 
Alge. 4. Fungi. 
THE NATURAL SYSTEM. 
The system of classification at present in use has gradu- 
ally gown up from a combination of those proposed by 
Jussieu, De Candolle, Endlicher, Lindley, Bentham, and 
other systematists, and may therefore be called an Eclectic 
System. According to it the vegetable kingdom is divided 
into two great sections, Cryptogamia and Phanerogamia, the 
former being destitute of flowers containing anthers and 
ovules, the latter having these organs. 
R 2 
