1 88 PHARMACEUTICAL BOTANY 



When of nearly cylindrical form, the corolla is Tubular, as in the 

 Honeysuckle, and Stramonium. 



Funnel-form (Infundibuliform), such as the corolla of the common 

 Morning Glory, a tube gradually enlarging from the base upward 

 into an expanded border or limb. 



Campanulate, or Bell-shaped, a tube whose length is not more 

 than twice the breadth, and which expands gradually from base to 

 apex. Examples: Canterbury Bell, Harebell. 



Urceolate, or Urn-shaped, when the tube is globose in shape and 

 the limb at right angles to its axis, as in the official Uva Ursi, Chima- 

 phila and Gaultheria. 



Caryophyllaceous, when the corolla consists of five petals, each 

 with a long slender claw expanding abruptly at its summit into a 

 broad limb. Examples: Carnation and other members of the Pink 

 family. 



The Androecium or Stamen System. The andrcecium is the single 

 or double whorl of male organs situated within or above the corolla. 

 It is composed of stamens or microsporophylls. 



A complete stamen (Fig. g^D) consists of a more or less slender 

 stalk portion called a filament and a terminal appendage called the 

 anther or microsorus. The anther is generally vertically halved by 

 an upgrowth of th'e filament, called the connective, dividing the anther 

 into two lobes. 



Number of Stamens. When few in number, stamens are said 

 to be definite; when very numerous, and not readily counted, they 

 are indefinite. The following terms are in common use to express 

 their number: 



Monandrous, for a flower with but one stamen. 



Diandrous, with two stamens. 



Triandrous, with three. 



Tetrandrous, with four. 



Pentandrous, having five. 



Hexandrous, six. 



Polyandrous, an indefinite number. 



The most primitive flowers have numerous stamens, but passing 

 from these to those of more evolved families there occurs a gradual 

 reduction from many to ten, as in Caryophyllacece, Leguminosa and 



