GLOSSARY. 
Abortive. Undeveloped, rudimentary. 
Abscission. The falling of leaf, twig-tip, etc. from a clean- 
cut scar, by a self-healing wound. 
Acuminate. Pointed, with a line-of-beauty curve. 
Acute. Sharp-pointed, in contrast with obtuse and.acuminate. 
Adnation. Growing together of different members. 
Adventitious. Not in the usual place (buds that have re- 
mained undeveloped so that they are no longer evidently 
axillary, or that really originate elsewhere, as on a root). 
Aerial roots. Roots produced above ground, often used for 
climbing (ivy). 
Aggregated. Joined together, confluent, as applied to bundle- 
traces. 
Alternate. One at a node, as applied to leaf-scars. 
Amplexicaul. Encircling the stem (magnolia stipules, nan- 
dina leaves). 
Analogous. Of comparable function but different origin.—See 
physiology. 
Angiosperms. Plants that mature their seeds within the pis- 
til. They constitute the dominant vegetation of today. 
Appressed. Not spreading, as applied to buds, hairs, ete. 
Approximated. Brought near to one another, as applied to 
buds. 
Arboreous. Tree-like. 
Arborescent. Becoming small trees. 
Arcuate. Arched, bent like a bow. 
Armed. With spines (barberry, Japanese quince) or prickles 
(brambles). Leaves that are pungent at tip or around 
the margin (holly), are not included in this limited defi- 
nition. 
Aromatic. Fragrantly scented, at least when broken. 
Articular-membrane or tegment. A membrane consisting of 
the thin enlarged base of the petiole, on which the leaf- 
scar occurs (mock-orange, locust). 
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