BOTANICAL TERMS AND DEFINITIONS. 
XXXV 
Opposite, (Oppositum) applied to the position of leaves placed 
exactly opposite each other on the stem ; also to branches 
growing in pairs; and to peduncles placed opposite to 
a leaf. 
Orbicular, or Circular, (Orbiculatum) leaves are so called 
M'hen their length and breadth are equal, and their form 
nearly circular. 
Palmate (Palmatum) applied to leaves which are divided, half or 
rather more than half way down the middle, into several 
nearly equal segments, having a space between each. 
Pandurtforme, vide Fiddle-shaped. 
Panicle, (Panicula) a species of inflorescence, in which the 
flowers are scattered on peduncles, variously subdivided 
without any order, and more or less close. When the 
stalks are at some distance it is called Diffusa, a lax or 
spreading panicle ; when still more spreading, a divaricated 
panicle ; and when the flower stalks are more together, it 
has the appellation of a close or dense panicle. 
Papilionaceous, f Pa;)«7iowacea^ applied to the form of a polype- 
talous corolk of an irregular spreading form, somewhat 
resembhng a butterfly and composed of four petals, distin- 
guished by appfopriate names; the two side petals, wings, 
(Alae) ; the large one at the back, banner or standard, 
(Vexillum) ; and the lower one, the keel, (Carina)— the last 
contains and protects the internal organs. 
Papillose, {Papillosus) applied to stems covered with soft tuber- 
cles ; also to leaves covered with fleshy points or dots. 
Pappus, or Seed-dow n, (Pappus) the feathery, bristly, or chaflTy 
appenda<^e that crowns many seeds which have no pericar- 
pium, as in the dandelion. 
Partition, (Dissepimtntum) the part which divides a capsule into 
many separate cells is so called. 
Pectinate, (Pectinatum) applied to a pinnatifid leaf, whose seg- 
ments are extremely narrow, resembling the teeth of a 
comb. 
Pedate, {Pedatwm) applied to a peculiar kind of ternate leaf, its 
lateral leaflet being compounded in the forepart : example, 
black hellebore. 
Pedicel, {Pedicellus) a partial flower stalk, or a subdivision of the 
general one, each subdivision being denominated a pedicel. 
Peduncle, (Pedunculm) the stalk that bears the flower and fruit. 
