Sb AME 
ZEstiva’les, (from estas, summer.) Plants which blossom in summer 
AG (from @, without, and fores, a door.) Having no doors or 
valves. 
Aga’mous, (from @, without, and gamos, marriage.) Plants without 
any visible stamens or pistils, are by French botanists called aga- 
mous. 
A’ges of plants. Ephemeral are such as spring up, blossom, and ripen 
their seed in a few hours or days; annual live a few months, or one 
summer. 
biennial, spring up one summer, and die the following. 
perennial, live an indefinite period. 
Ag’gregute, (from aggregare, to assemble.) Many springing from 
the same point: this term was at first applied to compound flowers, 
but there is at present a sevenfold division of aggregate flowers; the 
aggregate, properly so called. 
compownd, 
wmbellate, 
cymose, 
amentaceous, 
glumose, 
spadiceous. 
Aggregate flower is erected on peduncles or footstalk, which all have 
ohe common receptacle on the stem; they sometimes have one com- 
mon calyx, and are sometimes separataly furnished with a calyx. 
Ai'gretie. See egret. 
A’‘la. A Latin word signifying a wing. It is sometimes used to ex- 
press the angle formed by the stem with the branch or leaf. Linneus 
and some others use the term ala, as the name of a membrane af- 
fixed to some species of seeds which serves as a wing to raise them 
into the air, and thus promotes their dispersion. 
A’‘le. The two lateral or side petals of a papilionaceous flower. 
Albu’/men. The farinaceous, fleshy, or horny substance, which consti- 
tutes the chief bulk of monocotyledonous seeds; as wheat, rye, &c. 
Alburnum, (from albus, white.) ‘The soft white substance, which in 
trees is found between the liber, or inner bark, and the wood, and be- 
coming solid, in progress of time is converted into wood. From its 
colour and comparative softness, it has been styled the fat of trees. 
It is called the sap wood, and is formed by a deposite of the cambium 
or descending sap; in one year it becomes wood; and a new layei 
of alburnum is again formed by the descent of the cambium. 
Al’ge. Flags; these by Linneus comprise the plants of the order 
Hepatice and Lichenes. 
Alpine. Growing naturally on high mountains. 
Alier’nate. Branches, leaves, flowers, &c. are alternate, when begin- 
ning at different distances on the stem; opposite, is when they com 
mence at the same distances, and base stands against base. 
Alter’nately pinnute leaf; when the leafets are arranged alternately on 
each side of the common footstalk or petiole. 
Alve’olate. Waving cells which resemble a honey-comb. 
Am/bitus. The outer rim of a frond, receptacle, &c. 
A’ment. Flowers collected on chaffy scales, and arranged on a thread 
