

axospermoua 



autum'nal, autumna'lis(L&t.), belong- 

 ing to autumn ; flowering at that 

 season ; ~ Wood, wood formed at 

 the close of the growing season and 

 notable for its smaller cells. 



Auxan'agramines (atffy, increase, &va, 

 up, ypdfj.fj,a, an outline), bacterian 

 fields of increase, marked by greater 

 development within the diffusion 

 area of the nutrient substance 

 (Beyerinck) ; Auxanom'eter (utrpov, 

 measure), apparatus for measuring 

 increase of growth in plants. 



Auxe'sis (aOfrffis, growth), (1) dilata- 

 tion or increase in the valves of 

 Diatoms, etc. ; (2) new formation 

 of organs (Czapek). 



Auxiliary (auxiliaris, helpful) Cell, a 

 cell borne by a specialised branch 

 in certain Algae, which unites with 

 the conjugating tube emitted by 

 the fertilized trichophore, and then 

 giving rise to filaments which bear 

 the spores (Osterhout). 



Aux'ospore (atifr, increase, airopa, 

 seed), in Diatoms, the spore formed 

 by the union of two frustules, 

 or the excessive growth of a single 

 fruatule, whence arises a new bion, 

 larger than the parents ; auxoton'ic 

 (rbvos, strain), applied to the move- 

 ments incident to increase of grow- 

 ing organs, as heliotropism, nuta- 

 tion, etc. 



aveUan'icus (avellana, a filbert), 

 drab, the colour of the fresh shell 

 of the Hazel-nut, Cory lus Avellana, 

 Linn. 



avena'ceous, -ceus (avena, oats), relat- 

 ing to oats ; Av'enine, a substance 

 derived from oats. 



ave'nius (a, without, vena, vein), vein- 

 less, or seemingly so. 



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

 or away from. 



Averrunca'tion (averrunco, I remove), 

 (1) pruning ; (2) uprooting. 



awl shaped, narrow and tapering to a 

 point ; subulate. 



Awn, a bristle-like appendage, es- 

 pecially occurring on the glumes 

 of grasses ; ^ of Chaetoceras, a 

 diatomaceous genus, having pro- 



longations of the frustules, recal- 

 ling the awns of grasses; awned, 

 having awns ; bearded. 



axe-shaped, dolabriform, as the leaves 

 of some species of Mesembryanthe- 

 mum. 



axial (axis, an axle), relating to the 

 axis ; <- Wood, the normal central 

 cylinder of xylem ; axif erous (fero, 

 I bear), bearing an axis, but with- 

 out leaves or other appendages. 



Axil, Axill'a (Lat. arm -pit), the angle 

 formed between the axis and any 

 organ which arises from it, espe- 

 cially of a leaf. 



axile (axis, an axle), belonging to the 

 axis, as axile placentation. 



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

 an angle ; axUl'ary, axiila'ris, grow- 

 ing in an axil; axilla'tus, having 

 axils. 



Axis (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 raphe and 

 at equal distances from homo- 

 logous points of the girdle -band 

 surfaces ; Append'ages of the ~ , 

 such organs as leaves, flowers, etc. ; 

 ascending <~ , = the stem ; descend' - 

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

 main longitudinal axis of Diatoms ; 

 transa'pical ~, the axis which 

 passes at right angles to the apical 

 axis of Diatoms, and through the 

 centre of the pervalvar axis ; trans- 

 vers'al ~ , the axis which lies in the 

 transversal plane of Diatoms, cut- 

 ting the pervalvar axis. 



Axog'amy (a|wj/, axis, ydpos, marriage), 

 plants bearing sexual organs on 

 the leafy stem; adj. axogamlc ; 

 Axophy'ta (<}>VTOV, a plant) = COEMO- 

 PHYTA ; plants having an axis, that 

 is, stem and root ; axosperin'ous 

 (<T7n?/o/ta, seed), with axile placenta- 

 tion of ovules. 



