5 io GLOSSARY 



Apetalous (A-pet'-a-lous), petals absent, 145. 



Apogamy (A-pog'-a-my), where the spore plant generation of the fern 



develops directly from the gamete plant without the intervention of 



sexual organs, 370. 

 Apospory (A-pos'-po-ry), where the gamete plant (prothallium) develops 



directly from the spore plant, or rudimentary spore case, without the 



intervention of spores, 370. 

 Apothecium (A-po-the'-ci-um, plural, apothecia), literally a storehouse; in 



botany the ascocarp of the lichens, whether cup-shaped, or a perithecium, 



300, 301. 

 Archegonium (Ar-che-go'-ni-um, plural, archegonia), the female sexual 



organ of the Bryophytes, Pteridophytes, and Gymnosperms, 335-340, 



342, 347, 348, 356, 365-368, 376, 379, 392, 400, 410. 



Ascocarp (As'-co-carp, ascus fruit), the fruit body of the fungi, which con- 

 tains or supports the asci, 332. 

 Ascoma (As'-co-ma, plural, ascomata), the ascocarp of the cup fungi, morels, 



etc., 294. 



Ascospore (As'-co-spore), a spore borne in an ascus, 291, 293. 

 Ascus (As'-cus, = sac) , an organ or structure characteristic of the sac fungi 



which contains spores (usually 8), 273, 287, 290, 293, 295, 296, 300. 

 Asexual (A-sex'-ual), without a sexual process, 224, 242, 244, 258, 259, 261, 



275, 281, 284, 285, 294. 

 Assimilation, the building up of new substances, or -matter from crude 



material. 

 Auxospore (Aux'-o-spore) , increasing spore; in the diatoms a small spore 



which casts its skeleton and grows to a large one before taking on a new 



skeleton, 257. 



Axil, the point in the upper angle of a leaf and the stem. 

 Axillary, in the axil of a leaf, 53. 

 Basidium (Ba-sid'-i-um = club), an organ or structure characteristic of the 



mushrooms, puffballs, etc. (basidium fungi) which bears usually 4 spores 



on as many minute points (sterigmata) at the end, 274, 323, 332. 

 Bast, the fibrous tissue of the inner bark of exogenous stems; the phloem, 



60, 63, 64. 

 Berry, a fruit in which both exocarp and endocarp are fleshy, as in the 



tomato, 212. 



Biciliate (Bi-cil'-i-ate), having two cilia. 

 Biennial, living for two years or two seasons, 43. 

 Bilabiate (Bi-la'-bi-ate), two-lipped, 162, 188. 

 Bract, a small leaf, often on specialized shoots, as flower shoots, rhizomes, 



etc., 95, 148. It may or may not contain chlorophyll. 

 Bryophyta, or Bryophytes (Bry-oph'-y-ta, or Bry'-o-phy tes) , branch of the 



Plant Kingdom including the mosses and liverworts, 225, 229. 



