| tp Se Ree SES aS ea arc ~ 
118 Structural and Physiological Botany, = 
; , ik a. 2 Ne ge Noy 
it may be xaked, or setose, ze. clothed with bristles (Fig. 217); 
_ or covered with hair-like bracts or palee when it is paleaceous 
: | (Fig. 218), or fim- — — 
briated ; or it may be | 
Sa pitted with small ex-. 
oN cavations.. All these 
forms of receptacle 
occur in different 
genera of Compositee. | 
The capitulum is 
most commonly—in 
Compositee [and Dip- - 
sacaceze | always—en,; ~ 
closed at its base in 
a common énvolucre, 
\\\ consisting of crowded 
i) bracts, | sometimes 
Fic. 214.—Longitudinal, section through the rayed arranged in several 
capitulum of the chamomile with hollow receptacle, z 
the outer flowers of the ray ligulate, the inner flowers whorls, and then 
of the disc tubular (magnified). 
| hoe 
mh 
ALL 
Sas 
ea— 
7 
‘ 
Fic. 215.—I. Longitudinal section through the hypanthodium of a fig, exposing the 
flowers in its interior; 1I, a piece greatly magnified, with five female flowers; = 
s pistil ; 4 perianth. eas aa 
