LEGUMINOS#. 529 
none, perigynous ; odd one, when present, posterior. Stamens 
distinct, or united into one or more bundles. Ovary superior, 
simple, 1-celled ; style simple, proceeding from the ventral 
suture. Fruit usually a legume, or sometimes a lomentum, and 
rarely a drupe. Seeds 1 or more, rarely with, or usually without 
Fic. 943. Fie. 944. Fic. 945. 
Fria. 946. 
Fig. 943. Diagram of the flower of the Garden Pea (Pisum sativum). s. 
Anterior sepal. ps. Superior petal. pi, pi. Inferior petals. pl, pl. Lateral 
petals. ef, Stamens. c. Carpel-——/Fig. 944. The flower of the same. ef. 
Standard or vexillum. ai. Wings or ale, car. Carina or keel enclosing 
the essential organs. c. Calyx._—Fig. 945. The essential organs of the 
same surrounded by the calyx c, es. Bundle of nine stamens. el. Solitary 
stamen, s/f. Style and stigma,—Fig. 946. Legume of the same, with one 
valve removed, 
albumen. This order may be generally distinguished by having 
papilionaceous corollas or leguminous fruit. 
Division of the Order and Lilustrative Genera.—The order has 
been divided into three sub-orders as follows :— 
Sub-order 1. Papitionace®.—Petals arranged so as to form a 
papilionaceous corolla (fig. 944), imbricate in estivation, and 
the upper or odd petal exterior to the lateral petals. —_Illus- 
trative Genera :—Ulex, Linn. ; Trifolium, Linn. ; Vicia, Linn. ; 
Ornithopus, Linn. 
Sub-order 2. C#saLprnie&.——Petals not arranged in a papi- 
honaceous manner, imbricate in eestivation, and the upper 
or odd petal with its margins inside the lateral petals. Ilus- 
trative Genera :—Cesalpinia, Linn. ; Cassia, Linn. There are 
no British plants in this sub-order. 
Sub-order 3. Mimosr%.—Petals equal, valvate in estivation. 
Pollen compound. Illustrative Genera: — Mimosa, Linn. ; 
Acacia, Willd. There are no British plants in this sub-order. 
Distribution and Numbers.—This is a veryyextensive order, 
and has some representatives in almost every part of the world. 
A considerable number of the genera are, however, confined 
within certain geographical limits, while others have a very wide 
range. Asa general rule the Papilionacee are universally dis- 
tributed, although most abundant in warm regions ; while the 
MM 
