152 ESSENTIALS OF BOTANY 
sympetalous corolla and these are of much use in accurate 
descriptions of seed-plants. A few of these are illustrated 
Fig. 103. 
Bell-Shaped Corolla of 
Bell-Flower (Cam-  Salver-ShapedCorollaot of Stamens. —Sta- 
panula). Jasmine. (Magnified.) yieng are of many 
ARE 3 
de 
Fic. 105. 
Wheel-Shaped 
Corolla of 
Potato. 
in this chapter 
(Figs. 103-107). 
181. Forms of 
Fic. 104. the Stamen; Union 
specialized forms to adapt them to their functions in 
flowers of various shapes, 
but many are of the shape 
shown in Fig. 108. Such 
a stamen consists of an 
expanded part, the anther, 
borne on a stalk called 
the filament. Anthers are 
often nearly or quite ses- 
sile (i.e. destitute of fila- 
ments). Inside the anther 
is the powdery or pasty 
substance called pollen 
(Sect. 190). 
Fie. 106. Fie. 107. 
Tubular Corolla, from Labiate or Ringent 
Head of Bachelor’s Corolla of Dead 
Button. Nettle. 
Stamens may be wholly unconnected with each other, or 
distinct, as shown in Figs. 97, 98, 100, or they may be 
