THE FLOWER 271 
striking, and the petals bear special names: the largest one is the 
vexillum, or standard; the two beneath it the alg, or wings; the 
two anterior, the carina or keel. Examples: Locust, Pea, and 
Clover. [Fig. 193 (9).] 
Orchidaceous flowers are of peculiar irregularity, combining 
calyxand corolla. The petal in frontofstamen and stigma, which 
differs from the others in form and secretes nectar, is called the 
Labellum (Fig. 192). Examples: Cypripedium and other Orchids. 
Fic. 191.—Apple (Malus sylvestris). Median lengthwise section of flower. 
Note the epigynous insertion of sepals, petals and stamens. The ovary is inferior. 
(After Robbins.) 
When calyx and corolla each consist of three parts closely 
resembling each other in form and color, as in the Tulip and Lily, 
the flower is called Liliaceous. 
The Ligulate or Strap-shaped corolla is nearly confined to the 
family Composite. It is usually tubular at the base, the remainder 
resembling a single petal. Examples: Marigold and Arnica 
Flowers. 
Labiate, or Bilabiate, having two lips, the upper composed of 
two petals, the lower one of three. This form of corolla gives the 
name to the Labiate, while in the family Leguminosa this arrange- 
