I 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. 



IAmplexicaul. 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, etc. 

 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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