54 THE PERIGONE 



The Tube, Throat, and Limb. — In such corollas and calyces as are 

 represented by Figs. 97 to 99, the narrow portion is denominated the 

 Tube and the broad portion the Limb. When the change from tube to 

 limb is not abrupt, there will be an intermediate portion, as displayed 

 at h in Fig. 94, called the Throat. Less frequently this term is applied 

 also to the delimiting circle between the limb and the tube when these 

 do meet abruptly. Occasionally distinct contraction instead of a dila- 

 tation will be found at the throat, as very frequently occurs in other 

 parts of the tube (Fig. 100). 



The Margin. — The terminal boundary line, including all its extensions 

 and intrusions, is called the Margin. The margin may intrude partly 

 or quite to the tube, so that the cohesion may include none or the whole, 

 or any part of the throat, or of the limb. 



Special Terms Indicating Form. — The terms regular and irregular 

 apply to lobes precisely as though they were distinct sepals or petals 

 and to the united portions as well as to the lobes. Some of the terms 

 applicable to the forms of the gamopetalous corolla (and, of course, to 

 the gamosepalous calyx) refer to its entire body, while others refer to 

 its several parts. The former class, and among them those which are 

 regular, will be first considered. 



The term Cylindrical is self-explanatory. If nearly cylindrical, it is 

 called Cyhndraceous. Such shapes are shown in Figs. 29 and 99. If 

 such a one is manifestly angled, as in the calyx of Mimidus (Fig. 94), 

 it is Prismatic, and the same is true of other tubular forms. If the 

 entire body flares regularly (Fig. 97), or if there is such a flaring portion 

 upon a cylindrical tube, it is called Infundibular or Funnel-shaped. 

 The less broadened infundibular forms are called Trumpet-shaped, as 

 in the honeysuckle. If the flaring portion or limb is flat, or nearly so 

 upon a cylindrical or cyhndraceous tube, it is called Hypocraterimor- 

 phous, Hypocrateriform, or Salverform, as in the flower of the coffee 

 (Fig. 101). A corolla which is bell-shaped is called Campanulate 

 (Fig. 9.3). Of this there are two sub-forms, the Open (Fig. 91) and the 

 Contracted (Fig. 95). The term Globular or Globose is self-explanatory. 

 It may be specified, however, that the mouth must be small and with 

 no conspicuous limb, or with the limb turned back flat against the 

 body. Approaches to the globular form are called Sub-globular or 

 Globoidal. Other related forms are the Ovoid or egg-shaped and 

 oblong. A somewhat globoidal form, with conspicuous recurved 

 margins, is Urceolate or Urn-shaped (Fig. 102). Of the broader or 

 more widely expanded forms, the campanulate develops outward into 



