CLASSES. DIVISIONS, AND ORDERS 
OF 
BRITISH PLANTS. 
Class I. DICOTYLEDONES.i 
Stems when perennial composed of bark, wood, and pith. 
The wood furnished with medullary rays and increasing by 
the addition of concentric layers externally. Leaves usually 
net-veined. Cotyledons 2 or more, opposite or whorled. — 
Each floral whorl composed of 5 or 4 parts. 
Division 1. THALAinFLOEj:. Pet. distinct (rarely 0) and 
as weU as the stam. growing separately from the 
sepals, hypogynous page. 1 
Division 2. Calycifloej;. Pet. distinct and, as well as 
the stam., perigynous or epigynous 82 
Division 3. CoeollifloBjE. Pet. united, at least at the 
base. Stam. mostly epipetalous 182 
Division 4. Monochlamydej:. Only a single perianth 
or none 349 
Division 5. Gymnospeemj:. Ovules and seeds apparently 
naked. Ovarj' and styles wanting. Perianth wanting. 390 
Division 1. THALAMIFLOR.E. 
* Apocarpous. 
1. Ranunculacece. Stam. polyandrous (rarely pent- 
androus). Pistils usually many, of achenes or follicles. — 
Rarely (in Actl^a) a many-seeded berrylike carpel 1 
2. Berberidacerf. Stam. 6 or 4, opposite the petals; 
anth. opening by valves from the bottom 16 
1 The charaeteis are drawn to suit our plants. 
xl 
