Auzesii 



Axil 



of leaves, hairs, etc, , on a particular 

 side (Pfeffer). 



Auxil'iaries, used by S. Moore for 

 Syneroidae. 



Auxil'iary {auxiliaris, helpful) Cell, a 

 cell borne by a specialized branch 

 in certain Algae, which unites with 

 the conjugating tube emitted by 

 the fertilized tricho'phore, and then 

 gives rise to filaments bearing the 

 spores (Osterhout) ; '-' Nu'oleus, the 

 nucleus of the auxiliary cell in 

 Ih-udesnaya purpurifera, J. Ag., 

 which does not fuse with ihe nucleus 

 of the sporogenous cell when the 

 cytoplasm does (Oltmanns) ; --' 

 Ve'sicles = Synekgidae. 



Aux'oblast, (oC|7j, increase ; ^Xaffrhs, 

 shoot), employed by Kirchner for 

 any shoot which can serve for vege- 

 tative reproduction ; Anxo'sis, used 

 when the general growth of an organ 

 has suffered a change (Massart) ; 

 Aux'ospore (<nropck, seed), in Diatoms, 

 the spore formed by the union of two 

 frustules, or the excessive growth 

 of a single frustule, whence arises a 

 new bion, larger than the parents ; 

 auxoton'ic {rivos, strain), applied to 

 the movements incident to increase 

 of growing organs, as heliotropism, 

 nutation, etc. 



avelhi'neus (Clements), avellan'icus 

 {avellana, a filbert), drab, the colour 

 of the fresh shell of the Hazel-nut, 

 Corylus Avelldna, Linn. 



avena'ceoas, -cetis {avena, oats), relat- 

 ing to oats ; Av'enine, a substance 

 derived from oats. 



aye'niui (o, without ; vena, vein), vein- 

 less, or seemingly so. 



Averrunea'tion {averrunco, I remove), 

 (1) pnming ; (2) uprooting. 



averse', aver'sus (Lat.), turned back 

 or away from. 



Av'oform {aims, a grandfather, + 

 Fokm), the still existing stem-form 

 of Ramiform and Praeform 

 (Kuntze). 



awl-shaped, narrow and tapering to a 

 point ; subulate. 



Awn, a bristle-like appendage, espe- 

 cially occurring on the glumes of 



4 



grasses ; -^ of CJiaetoceras, a dia- 

 tomaceous genus, having prolonga- 

 tions of the frustules, recalling the 

 awns of gi'asses ; awned, having 

 awns ^ bearded. 



axe-shaped, dolabiiform, as the leaves 

 of some species of Mesemhryanthe- 

 muvi. 



ax'ial {axis, an axle), relating to the 

 morphological axis, as distinct from 

 its appendages ; -- Bow, the two or 

 more first- formed cells in the embryo- 

 sac (Wiegand) ;~ Shoot, a cylindrical 

 appendage in the axil laetween stem 

 and leaf in Zyaopteris ; it is a pro- 

 longation of the ~ Strand, itself 

 the stele of the main stem (Scott) ; 

 -' Wood, the normal central cylinder 

 of xylem ; axirerous {/ero, I bear), 

 bearing an axis, but without leaves 

 or other appendages. 



Ax'il, Axiira (Lat., arm-pit), the angle 

 formed between the axis and any 

 organ which arises from it, espe- 

 cially of a leaf. 



ax'ile {axis, an axle), belonging to the 

 axis without reference to its morpho- 

 logical nature, as axile placentation. 



axill'ant {axilla, arm-pit), subtending 

 an angle ; axill'ary, axiUa'rv<, gi-ow- 

 ing in an axil ; axilla'tus, having 

 axils. 



Ax'is (Lat., an axle), an imaginary 

 line, round which the organs are 

 developed ; --' of Inflores'cence, 

 that part of the stem or branch 

 upon which the flowers are borne ; 

 access'ory ~', an axis of secondary 

 rank ; a'pical '*- of Diatoms, is 

 that line which passes through 

 the centre of the pervalvar axis in 

 the direction of the raplie and 

 at equal distances from homo- 

 logous points of the girdle-band 

 surfaces ; Append'ages of the ~ , 

 such organs as leaves, flowers, etc. ; 

 ascend'ing '~' , = the stem ; descend'- 

 ing '~, = the root ; pervalv'ar ~ , the 

 main longitudinal axis of Diatoms ; 

 trania'pical -^j the axis which 

 passes at right angles to the apical 

 axis of Diatoms, and through the 

 centre of the pervalvar axis ; trans- 



