Apostrophe 



arachnoid 



by bleeding, gumming etc. ; Apost'- 

 rophe (<rT/jo0T?, turning) the position 

 assumed by the chloroplastids 

 during intense light, along the sides 

 of the cell-walls, instead of the 

 outer surface ; negative ~ , is caused 

 by weak light, as at night, and 

 positive ~ , by strong light ; apot'ro- 

 pous (r/367ros, direction) used of an 

 anatropous ovule, which when pen- 

 dulous has the raphe averse. 



Ap'othece=:Apothe'cium (#17/07, a case), 

 an organ of fructification peculiar 

 to lichens, and usually cup-shaped 

 "Shields." 



Appen'dage, Appen'dix (Lat. an ad- 

 dition), (1) apart added to another, 

 as leaves are appendages to the 

 stem, (2) a name given to processes 

 of any kind, especially those of the 

 perithecia of fungi ; (3) in the 

 plural the term Appen' dices was 

 formerly applied to suckers, such 

 as the offsets of the Pineapple. 



appen'dent, appen'dens (appendo, L 

 hang by), when the hilum is 

 directed towards the upper part 

 of the seed, which is sessile or 

 nearly so on the placenta, as in 

 stone-fruits. 



appendic'ulate, appendicula'tus (ap- 

 pendicula, a small appendage), 

 furnished with appendages ; ap- 

 pen'dicled. 



Appendic'ulum , diminutive of AP- 



appense' (appen'sus, weighed), being 

 hung up as a hat is upon a peg, an 

 approach to pendulous (Lindley 

 in Loudon, Encyc. PI. 1095). 



ap'planate, applana'tus (ad, to, plan- 

 atus, made flat), flattened out or 

 horizontally expanded. 



Ap'ple, a fleshy, inferior, plurilocular, 

 two to five-seeded fruit, technically 

 styled a Pome. 



applica'tus (Lat. close to, or at- 

 tached), applicati'vus, applied face 

 to face, without folding. 



ap'posite, appos'itus (Lat, applied to), 

 when similar parts are placed close 

 to or side by side ; apposifo'liar 

 (folium, leaf), an error for oppositi- 



folious ; Apposit'ion, side by side 

 or close to ; ~ Theory, of the 

 growth of the cell-wall, as due to 

 repeated disposition of layers of 

 substance on the internal surface 

 of the original cell-wall. 



appress'ed, appress'us,(ad, to, pressus, 

 kept under), lying flat for the whole 

 length of the organ ; Appres'sors, 

 organs of attachment of germinating 

 filaments of parasite to host. 



approximate, approxima'tus (ad, to, 

 proximo, I approach), drawn close 

 together, but not united. 



Aprica'rium (apricus, lying open), the 

 summer habitation of plants in 

 botanic gardens, for exposure to 

 sun and air ; apri'cus (Lat.), living 

 in open sunny places. 



ap'terous, -rus (a, without, 7rrep6j>, a 

 wing), wingless, used of petioles, 

 seeds, and the like ; apyre'nus 

 (irvpty, seed), applied to fruit which 

 is seedless, as cultivated varieties 

 of the pineapple, orange, or grape. 



Aquarium (Lat. relating to water), a 

 tank for aquatics in botanic 

 gardens. 



aquatic, aquat'icus (aqua, water), 

 living in water ; aquat'ilis, has been 

 defined as living under water ; the 

 first category would include Lemna, 

 and Typha, the second, Cerato- 

 phyllum, Cfiara, etc. 



aq'ueous, aq'ueus, aquo'sus (Lat. 

 watery) ; (I) indicates some colour- 

 less structure, hyaline ; (2) having 

 much water in the tissues ; aq'ueous 

 Tissue, consists of one or more 

 layers of thin walled parenchy- 

 matous cells, destitute of chloro- 

 plastids, with much watery sap, 

 without interspaces, and acting as 

 water-reservoirs ; aquiferous (fero> 

 I bear) Tissue, is a synonym. 



Ar'abin, a substance derived from 

 Gum Arabic, deflecting the polarised 

 beam to the left ; Ar'abinose, a 

 glucose obtained from it, also from 

 cherry-gum ; Arabinox'ylan, a hemi- 

 cellulose, found in the bran of wheat 

 and rye. 



arach'noid, arach'noideus 



21 



