1 86 PHARMACEUTICAL BOTANY 



petalous or Polypetalous. When more or less united, it is Camopeta- 

 lous, often called Synpetalous. 



When the distinct petals are four in number, and arranged in the 

 form of a cross, the corolla is called Cruciform. Example: Mustard 

 and other plants belonging to the family Cruciferae. 



The Papilionaceous corolla is so called because of a fancied resem- 

 blance to a butterfly. The irregularity in this form is very striking, 

 and the petals bear special names: the largest one is the vexillum, or 

 standard; the two beneath it the alee, or wings; the two anterior, the 

 carina or keel. Examples: Locust, Pea, and Clover. 



Orchidaceous flowers are of peculiar irregularity, combining calyx 

 and corolla. The petal in front of stamen and stigma, which differs 

 from the others in form and secretes nectar, is called the Labellum. 

 Examples: Cypridedium and other Orchids. 



When calyx and corolla each consist of three parts closely resem- 

 bling 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 Labiata, while in the family Leguminosa this arrangement is 

 sometimes reversed. The corolla may be either ringent, or gaping, 

 as in Sage, or personate, when the throat is nearly closed by a projec- 

 tion of the lower lip, as in Snapdragon. 



Rotate, Wheel-shaped, when the tube is short and the divisions of 

 the limb radiate from it like the spokes of a wheel. Example: The 

 Potato blossom. 



Crateriform, Saucer-shaped, like the last, except that the margin 

 is turned upward or cupped. Example: Kalmia latifolia (Mt. 

 Laurel). 



Hypocrateriform, or Saker-shaped (more correctly, hypocrateri- 

 morphous), when the tube is long and slender, as in Phlox or Trail- 

 ing Arbutus and abruptly expands into a flat limb. The name is 

 derived from that of the ancient Salver, or hypocraterium with the 

 stem or handle beneath. 



