BOTANIC MATERIA MEDICA, 401 
as monk's hood or wolf’s bane, used as a med- 
icine. Nat. order Ranunculacezx. 
Acotyledon—a-kot’-i-le’-don (Gr. a, without! 
kotuledon, a seed lobe). A plant whose germs 
have no seed lobes. 
Acrogen—ak’-ro-jen (Gr. akros, gennao, I pro- 
duce). A plant which increases its growth 
at the top; summit grower, as in the ferns, 
horsetails and club mosses. 
Adventitious—ad’-ven-tish-us (Lat. adventi- 
tius, abroad, foreign, from adventus, a com- 
ing to, an arrival, from ad, from, and venio, I 
come). Abnormal position, accidental, relat- 
ing, in botany, to false position of organs in 
the plant, as roots growing on aerial stems. 
Erophytes—ar’-o-fits (Gr. aer, air; phuton, a 
plant). Plants that live and flourish exclu- 
Sively on and in the air. 
Estivation—(see estivation). The plants that 
blossom in summer. 
Agamous—ag-a’-mus (Fr. a, without; amos, 
marriage). Plants that have no visible or- 
gans of reproduction. 
Aggregate—ag’-gra-gat (Lat. aggrego, I gath- 
er together, as in a flock; from grez, a flock). 
A number of compound flowers also used in 
the umbellate, cymose, glumose and spadice- 
ous inflorescence. . 
Albuminous—(Lat. a/éus, white). Having the 
nature of albumen. 
Alburnum—(Lat. a/dus, white). The soft, 
white portion of a tree next to the bark; the 
sap wood. 
Alembic—a-lem'’-bik (Arabic hleo or al, the, 
and ambig, a chemica) vesse); Spanish alam- 
