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where they .generally proceed from different parts of the 
common stalk, opposite to each other. 
3d. Spica, (a spike) when the flowers, having no partial 
peduncles, are arranged alternately around a common simple 
peduncle ; and it is called spica secunda , (a single rowed 
spike) when the flowers are all turned one way, following each 
other; and spica disticha, (a double rowed spike) when the 
flowers stand pointing two ways, as in folium, &c.: and it is 
distinguished by shape and. other circumstances. 
4th. Corymbus, (a cluster of ivy berries) when the lesser 
peduncles of the flowers proceed from different parts of the 
common peduncle or stalk ; and though of unequal lengths, 
and sometimes simple, and sometimes branched, yet form a 
regular surface at the top; as in the siliquose plants (class te- 
tr adynamia). The corymbus may be supposed to be formed 
from a spike, by adding partial peduncles to the flowers; and 
seems to be the mean between racemus and umhella, the pe¬ 
duncles rising gradually from different parts of the common 
stalk, like those of the raceme, and proceed to a proportion- 
able flight like those of the umbel. 
5th. Thyrsus (a young stalk). A thyrse is a mode of 
flow ering resembling the cone of a pine : Linnaeus saith, it is 
a panicle contracted into an oval, or egg-shaped form; the 
lower peduncles, which are longer, extend horizontally; and 
the upper, which are shorter,mount vertically, as syrittga , &c. 
6th. Racemus, (a bunch of grapes) it is called a raceme, 
when the flowers are placed on short partial peduncles, pro¬ 
ceeding as little latteral branches from and along the com¬ 
mon peduncle; it resembles a spike in having the flow'grs 
placed along a common peduncle, but differs from it in having 
partial peduncles ; it also differs from a corymbus in the 
shortness and equal length of its peduncles, not forming a 
regular surface at the top; as in ribes-rubrum, mtis, &c. 
7th. Panicula, (the tuft upon reeds, a panicle) when the 
flowers are dispersed upon peduncles variously subdivided; 
or it is a sort of branching spike, composed of several smaller 
spikes, attached along a common peduncle, as in avena, 
panic uni, and several other grasses, and many other plants. 
