258 PHARMACEUTICAL BOTANY 
SOLITARY INDETERMINATE.—The simplest form of inflores- 
cence in which a single flower springs from the axil of a leaf. A 
number of these are generally developed on the same stem. 
Example: Periwinkle. 
RacEME, or simple flower-cluster in which the flowers, on 
pedicels of nearly equal length, are arranged along a lengthened 
rachis, the first flower to open being at the base of the rachis and 
the last to open at the summit. Examples: Convallaria, Cimici- 
fuga, and Wild Cherry. 
ft WY 
Fic. 173.—Types of indeterminate or centripetal inflorescence. a, raceme: 
6, spike; c, panicle: d, corymb; e, umbel; f, head (capitulum) of Compositz type; g, 
head of clover type. (Gager.) 
Corymp, a short, broad cluster, differing from the raceme 
mainly in its shorter axis and longer lower pedicels, which give 
the cluster a flat appearance by bringing the individual florets to 
nearly the same level. Example: Hawthorn. 
UmseL, which resembles the raceme, but has a very short 
axis, and the nearly equal pedicels radiate from it like the rays 
of an umbrella. When the pedicels of an umbel put forth 
branches, these branches are termed secondary pedicels. Such, 
then, bear flowers at their tips and make up with other parts of 
the inflorescence a Compounp UmBet. Many examples of this 
mode of inflorescence are seen in the family Umbellifera, as 
indicated by the name, including Anise, Caraway, Fennel and 
other drug-yielding official plants. 
