778 GLOSSARY. 



Ancipital. Applied to compressed stems having two opposite wing-like 



margins, as in Sisyrinchium. 

 Androgynous. A monoecious plant having both staminate and pistillate 



flowers in the same inflorescence, as in some species of Carex. 

 Anemophilous. Flowers in which pollination is affected by the wind, as 



the grasses and pines (p. 399). 

 Annual. Of, for, or pertaining to a year, as plants which are of only 



one year's duration, or less (p. 330). 

 Annular. Having the form of a ring; applied to the ring-like thickenings 



of tracheae (p. 273), or to the ring-like layerings in the wood of 



trees indicating their growth (p. 433). 

 Anther. The enlarged portion of the stamen which contains the pollen 



sacs (p. 379). 

 Antheridium. A cell or group of cells which enclose the male gametes 



(sperms) or antherozoids, as in the Archegoniates (pp. 5 and 88). 

 Antherozoid. The male gamete or sperm cell produced in the antheridium 



of Cryptogams (pp. 5 and 88). 

 Anthotaxy (Anthotaxis). The study of the.*arrangement of flowers on 



the stem (p. 393). 



Apetalous. Having no petals or corolla. 

 Apiculate. Applied to the summit of leaves in which the midvein projects 



as a short and abrupt point or apiculus. 

 Apocarpous. A gynaecium or aggregate of pistils in which the latter are 



distinct or separate. Also applied to fruits composed of separate 



carpels (p. 376). 

 Apogamous. Without sexual reproduction, the plant perpetuating itself 



only by vegetative means. 

 Apothecia. The disk-like or cup-shaped fruit bodies in Lichens and Dis- 



comycetes (p. 73). 

 Archegonium. The female reproducing organ or egg in the Archegoniates 



and Gymnosperms (pp. 5, 88 and 109). Also known as oogonium. 

 Archesporium. Any fertile tissue which gives rise to either sexual or 



asexual spores (pp. 79, 122 and 124). 

 Arillode. An appendage or envelope of the seed-coat which originates 



at or near the micropyle (p. 427). 

 Arillus (Aril). An appendage or envelope of the seed-coat which arises 



from the funiculus or placenta near the hilum (p. 427). 

 Arthrospore. A vegetative cell which has passed into a resting state, 



becoming an asexual spore (p. 12). 

 Ascocarp. A special sac containing asci (p. 47). 

 Ascospore. A spore formed within an ascus (pp. 47 and 53). 

 Ascus. A sporangium of a definite shape and size and which contains a 



definite number of spores. Typical of the Ascomycetes (p. 47). 

 Assurgent. Applied to prostrate stems and leaves which become erect 



toward the summit. 



Attenuate. Becoming slender towards the summit ; slenderly tapering. 

 Auricle. An ear-shaped or ear-like appendage. 

 Auxospore. The name applied to the spores formed in the diatoms 



(p. 37). 



Awn. A bristle-shaped appendage, as the beard of wheat. 

 Axil. The sinus formed between the- upper surface of the leaf and the 



branch to which it is attached. 



Baccate. Fruits that are pulpy throughout and berry-like in structure. 

 Barb. A hair or bristle-like appendage having retrorse teeth. 

 Barbed. Furnished with barb-like hairs. 

 Barbelate (Barbulate). Having finely barbed hairs. 



