46 



ORGANOGRAPHY. 



variety of forms of the calyx and corolla; prominent 

 among -whicli are : Rotate, Salverform, Cam- 

 pauulate, Funnelform, Tubular, Labiate, and 

 Ligulate. 



56. A rotate (Lat. rota, wheel), or wheel- 

 shaped calyx or corolla, is one in which the 

 tube is very short or wanting, and the lobes 

 ^"^ spread at once (Fig. 102). In the salver- 

 form corolla, the spreading limb or border is raised on a 

 narrow tube, and forms a right angle with the latter (Fig. 

 103). The campanulate (Lat. campanula, 

 bell) denotes a bell-shaped calyx or corolla 

 (Fig. 104). In the funnelform, the tube is 

 narrow below, but gradually spreading above 

 like a funnel. The tubular form spreads 

 scarcely any above (Fig. 106). The two 

 upper petals "may unite closely and form a 

 kind of upper lip, and the three lower ones 

 unite to form a lower lip (Fig. 105.) In such case the 

 corolla is labiate (Lat. labium, lip). The 

 calyx may also be labiate, or two-lipped. 



57. If a flower-head of a Sunflower be 

 examined, it will be found to consist of 

 numerous florets, with tubular corollas 

 interspersed with the bristles or chafi" 

 (Fig. 106), and a row of marginal flowers 

 called ray flowers ; these ray flowers have 

 strap-shaped corollas (Fig. 106, Kg), which 

 are called ligulate (Lat. ligula, tongue). A curious shape 

 is presented by the Pea or Bean (Fig. 107). The corolla 



Fig. 103, A Salverrorm corolla. Fig. lO'i. A Campanulate corolla. Fig. 105. A 

 Labiate corolla of Toad-flax. 



