208 



BOTANY. 



one of the petals being larger than the others, and covering 

 them in the bud. This petal is known as the standard. The 

 two lateral petals are known as the wings, and the two lower 

 and inner are generally grown together forming what is called 

 the "keel" (Fig. 115, A, B). The stamens, ten in number, 



FIG. 115. Calyciflorx (Leguminossi) . A, flowers and leaf of the common 

 pea, Pisum (Papilionacese), x %. t, tendril, st. stipules. B, the petals, 

 separated and displayed, x 1. C, flower, with the calyx and corolla removed, 

 x 1. 1), a fruit divided lengthwise, x V 2 . E, the embryo, with one of the 

 cotyledons removed, x 2. F, diagram of the flower. G, flower of red-bud, 

 Cercis (Csesalpinacese) , x 2. H, the same, with calyx and corolla removed. 

 /, inflorescence of the sensitive-brier, Schrankia (Mimosacese), x 1. 7, a 

 single flower, x 2. 



are sometimes all grown together into a tube, but generally 

 the upper one is free from the others (Fig. 115, (7). There is 

 but one carpel which forms a pod with two valves when ripe 

 (Fig. 115, D). The seeds are large, and the embryo fills the 

 seed completely. From the peculiar form of the flower, they 

 are known as Papilionacece (papilio, a butterfly). Many of 



