GLOSSAEY. 365 



GLOSSARY OF THE PEINCIPAl^j BOTANICAL 

 TERMS USED IN THIS WORK. 



Aceumbent. Lying against something, as the cotyledons of an embryo are accumbent 



when they lie against the radicle by their edges 

 Acerose. Needle-shaped ; linear or slender, with a sharp stiff point. 

 Achene. A single-seeded indehiscent point, having the pericarp thin and coriaceous, 



not woody, as in the nut. 

 Acicular. Very slender, but stiff and pointed like needles. 

 Aculeo.te. Having prickles. 

 Acuminate. Applied to a leaf suddenly narrowed at the top and then prolonged into 



a point. 

 Acute. Applied to the apex of a leaf when it forms an acute angle or tapers to a 



point. 

 Adherent. A term applied to unlike organs when they are united, as calyx with 



ovary. 

 Adnate. Applied to an organ that grows in attachment to another for its whole 



length : stipules, for example, may be adnate to the petiole, anthers to the 



filament. 

 Adpressed. See Appressed. 

 Aestivation. The relative position in the unexpanded bud of petals, sepals, and 



bud-scales. 

 AfoUate. Without leaves. 

 Albumen. In botany this term is applied especially to the endosperm, a tissue 



developed in the embryo-sac, and which may or may not be wholly absorbed by 



the embryo. In the former case the seed matures as an ex-albuminous seed, 



in the latter as an albuminous seed. Albumen is generally a mealy, oily, fleshy, 



or horn-like suhstance. 

 Alternate. One after another ; applied to leaves when placed singly instead of in 



pairs, also to stamens when alternating with petals instead of standing before 



them. 

 Alveolate. Pitted, so as to resemble a honeycomb. 

 Amorphous. Without determinate shape. 



Amphitropotis. Half inverted ; applied to ovules attached laterally. 

 Amplexicaul. Stem- clasping; applied to leaves when the sessile base of the blade 



clasps the stem. 

 Anatropous. Inverted ; applied to ovules. 

 Annular. (1) Eing-shaped ; (2) banded or marked with rings. 

 Anther. The pollen-bearing part of a stamen. 



Anthesis. The period of expansion of a flower ; also the act of expansion of a flower. 

 Apetalous. Without corolla. 

 Apiculate. Ending in a small point. 



