BOTANICAL EXERCISES. 
359 
“ calyx, sepals, 33 Similarly for the petals. The stamens will 
be found six in number, and the carpels two, so that these 
numbers must be inserted accordingly, and the first column 
of the Schedule will now stand thus : — 
The third column is headed u Cohe- 
sion. ^ This word refers to the condition 
which is sometimes presented by the parts 
of the whorls being united; as e. g. in the 
Primrose, where the five sepals are com- 
bined into one piece (cohere), as also are 
the petals of the corolla. The words used 
to express this condition are gamosepalous 
and gamopetalous respectively ; whereas 
when the sepals and petals are perfectly 
distinct, as in the wall-flower, the words 
polysepalous and polypetalous are employed. 
In certain cases, the calyx and corolla are undistinguishable, 
as in the tulip. Such two whorls are then called a perianth, 
while its parts are called leaves, and take the place of both 
calyx and corolla. The terms employed to express the cohe- 
sion or separability of its parts or leaves are gamophy lions 
and polypliyllous respectively.* 
For the number of stamens, a word is formed by the union 
of the termination androus with a Greek numeral prefix. 
For the benefit of readers unacquainted with that language, 
we subjoin the numerals as far as they are required : — 0, an ; 
1, mon ; 2, di ; 3, tri ; 4, tetr ; 5, pent ; 6, hex ; 7, hept ; 8, oct ; 
9, enne; 10, dec; more than 10, i.e. infinite; 00, poly. 
There are three other words occasionally required in the 
space appropriated to the description of the stamens ; viz., 
dynamous , adelphous, and syngenesious. The first two are to 
be inserted opposite the word “ filament,” the last opposite 
“ anther.” Dynamous is used only in conjunction with the pre- 
fixes di and tetr a, and the latter ( tetr a ) exclusively with reference 
to plants of the order Cruciferae, to indicate the fact, that of the 
six stamens, four are longer than two. Didynamous is likewise 
used for certain plants of the orders Labiatae and Scrophu- 
lariaceae, to show that of the four stamens, two are longer than 
two. The word adelphous requires the prefixes mon, di, tri, 
pent, and poly, and expresses the fact, that in these cases the 
filaments cohere into one, two, three, five, or many bundles or 
# Professor Henslow adopted the word perianth exclusively for the peta- 
loid division of Monocotyledons ; for all dicotyledonous plants which exhi- 
bited no true distinction between the calyx and corolla, the outermost whorl 
was called calyx. Some botanists, however, employ the word perianth for 
the 4th section, Incomplete, of Dicotyledons as well. 
Flower. 
No. 
Pistil, carpels 
2 
Stamen ) 
Filament > 
6 
Anther ) 
Corolla, petals 
4 
Calyx, sepals 
4 
2 B 2 
