XXXlil 
TABLE OF THE CLASSES AND SUB-CLASSES. 
a SS 
CLASS I. DICOTYLEDONES v. EXOGENZ. 
Stem having a central pith, surrounded by one or more concentric 
rings of woody and vascular tissue, and coated by a separable bark. 
Leaves usually articulated with the stem, and traversed by branchin, 
and anastomosing veins. Hmbryo with two (or more) opposite coty 
dons ; the young stem rising between the cotyledons. 
Sub-Class 1. THALAMIFLOR&.—Calyx and corolla (generally) present. Petals sepa- 
rate, inserted, as are also the stamens, on the receptacle (i.e. hypogynous). Ovary 
free. 
Sub-Class 2. CaLycirLor&®.—Calyx and corolla (generally) present. Calyx gamo- 
sepalous. Petals separate, or united into a monopetalous corolla, either perigyn- 
ous or epigynous. Stamens inserted on the calyx (perigynous ), or on the tube 
of a perigynous, or epigynous corolla. Ovary free, or more or less adnate to the 
calyx-tube. e 
Sub-Class 3. CoroLLIrtor®.—Calyz and corolla both present. Petals united in a 
monopetalous, perigynous corolla. Stamens inserted on the corolla. Ovary 
free or nearly so. ee 
Sub-Class 4. MonocHtaMypEa.-—Perianth single (a calyx, or calyx and corolla 
soldered together, coloured or green) or more or less imperfect, or altogether 
absent. ~ 
CLASS I. MONOCOTYLEDONES or ENDOGENZ. 
~ Stem not distinguishable into pith, wood, and bark, but consis’ 
— 
bundles of woody and vascular tissue separately imbedded in celh 
tissue, and encased in a firmly adherent outer rind. eaves usually 
sheathing at base, and traversed by sub-parallel, unbranched veins, 
running from the base to the apex, and connected by straight, cross 
veinlets. Embryo with one cotyledon ; the young stem starting from _ 
a cavity in the side. — 
“CLASS IIL, ACOTYLEDONES or CRYPTOGAMZ. 
Plants destitute of true flowers, or seed-producing organs :—propa- 
gated by spores, i. e. reproductive cells, not containing any embryo. 
Spores variously evolved, and fertilized in various ways. |This class 
comprises Ferns and Filicoid-plants, Characes, Mosses, Hepatic, _ 
Fungi, Lichens, and Alge or Seaweeds]. 
cellular 
