GLOSSARY OF TERMS USED IN THIS BOOK. 



Achene, a dry indehiscent fruit, one-seeded and with the pericarp adherent, 



230. 

 Adherent, term used when one floral set is joined to another, 221, 222. 

 Ament, a spike which falls away after the maturing of the flower, 227. 

 Anatropous, said of ovules which are so bent on the stalk that they are in- 

 verted, 206. 

 Androecium, the stamens taken collectively, 196. 

 Antheridium, the male sexual organ, that is, the organ or structure which 



bears the sperm cells, 122, 141, 142, 171, 173. 

 Apocarpous, term used when all of the pistils or carpels in the flower are 



separate from each other, 229. 

 Apogeotropism. a turning away from the earth, said of stems to indicate the 



direction of growth with reference to the earth, 108. 

 Archegonium, the female sexual organ of bryophytes, pteridophytes, and 



gymnosperms; it contains the egg, 143, 144, 172, 173. 

 Aril, a secondary outgrowth of the ovular coat in some seeds, 209. 

 Bracts, small undeveloped leaves, 219. 

 Bulb, a short underground stem covered with more or less thickened leaves, 



219. 

 Calyx, the sepals taken collectively, 195. 



Campylotropous, said of an ovule bent at right angles to its stalk, 206. 

 Capitulum, a flower head, formed by the close association of several flowers 



sessile on a shortened axis, 227. 

 Capsule, a dry fruit with a pericarp which opens at maturity, 230. 

 Carbohydrate, said of substances containing carbon, hydrogen, and oxygen, 

 the two latter in the proportions in which they exist in water (H a O), 79. 

 Carbon dioxide, a compound of carbon and oxygen in the proportion of C0 2 , 



72, 73, 82, 83, 94-101. 

 Caryopsis, an indehiscent fruit of one seed and a dry, leathery pericarp, 



230. 

 Catkin, see Ament, 227. 

 Chalaza, that part of the ovule which is attached to the funicleor stalk, 207, 



210. 

 Chlorophyll, the green pigment in the chlorophyll bodies which gives the 

 green color to leaves, 20, 76, 77. 



355 



