TERMINOLOGY. 71 
In an Umbel the flower-stalks are called rays, (radii). 
There are the following varieties of the Umbel. 
1, Simple, (simplex), when the rays bear but one 
flower. ; 
2. Compound, (composita), when each ray of the 
umbel supports a simple umbel, fig. 36. The rays 
which support the simple umbels are called the 
universal or genera! umbel, (wmbella universalis). 
The simple umbels are called the particular or par- 
tial umbels, (wmbella partialis s. umbellula). 
3. Sitting, (sessilis), when the umbel has no stalk. 
4, Pedunculated, (pedunculata), when it is fur- 
nished with a stalk. 
5. Close, (conferta), when the rays of the umbel 
stand so near one another that the whole umbel. be- 
comes very thick and close. 
6. Distant, (rara), when the rays stand wide. 
7. Poor, (depauperata), when the umbel has but 
few flowers. 
8. Convex, (convexa), when the middle rays are 
high, but stand thick, so that the whole form a glo- 
bular figure. 
9. Flat, (plana), when the rays being of equal 
length, the flowers form a flat surface. 
| § 60. 
The cymez, (cyma), consists of w number of 
branched flower-stalks, with irregular branches, and 
not rising from one point. It has considerable re- 
semblance to the Umbel. Examples of it are found 
in the elder, Sambucus zigra, and the guelder rose, 
Viburnum opulus. 
Wa. § 61. The 
