asymmetric 



aurantiaceous 



asymmet'ric, asymmet'rical (a, not, 

 o-^/ierpoj, symmetric); (1) irregular 

 in outline or shape ; (2) used of a 

 flower which cannot be divided in 

 any vertical plane into two similar 

 halves; (3) dissimilarity of the 

 number of the members in calyx, 

 corolla or genitalia. 



asyngam'ic (a, not, abv, together, 

 ydfj.o?, marriage), used of plants 

 prevented from intercrossing by 

 their flowering at different times. 



At'avism (atavus, an ancestor), an- 

 cestral resemblance, reversion to 

 an older type. 



ataxinom'ic (a, not, Tats, order, 

 Xoyoj, discourse), teratologic, ab- 

 normal structures not represented 

 among plants in a normal con- 

 dition, as Fasciation, Chloranthy, 

 etc. 



a'ter (Lat. ), pure, lustreless black ; 

 in composition, atro-. 



athal'amous (a, without, 0a\a,u,os, 

 bride-chamber), said of Lichens 

 without apothecia on their thallus. 



athall'ine (a, without, 0aAXos, young 

 shoot), without thallus. 



Ath'era (d6r)p,-epos, beard of corn), 

 in Greek compounds = awn or stiff 

 bristle. 



Atlantic type of Distribution, 

 Watson's term for British plants 

 which occur most frequently to- 

 wards the west of Great Britain. 



A'tom (a, not, ref/xi/ai, I cut), de- 

 fined by Nageli as the ultimate 

 particle of a chemical element ; in 

 botanic parlance it means the 

 smallest divisable portion of any 

 substance. 



Atomogyn'ia (arc/ids, cannot be cut, 

 ywrj, woman), the elder Richard's 

 name for the ANGIOSPERMIA of 

 Linnaeus. 



Atracten'chyma J (&TPO.KTOS, a spindle, 

 ^TX^ttj that poured in), prosen- 

 chyma, tissue of fusiform cells. 



atramenta'rius (atramentum, inky 

 fluid), inky ; black. 



atra'tus (Lat.), garbed in black; 

 blackened, as in some species of 

 Carex, the apex of the glumes 



being darkened ; atric'olor (color, 

 colour), inky-black, 

 at'ropal, preferably at'ropous (a, not, 

 TpowT), a turn), a synonym of OR- 

 THOTROPOUS ; applied to the ovule. 

 At'rophy (a, without, Tpo<j>r), nourish- 

 ment), wasting away, abortion or 

 degeneration of organs ; Atrophy' - 

 tes (<t>vrov, a plant), those Fungi 

 which cause atrophy of important 

 organs of the host-plant. 

 At'ropine, a poisonous alkaloid ob- 

 tained from Atropa Belladonna, 

 Linn. 



atro-purpu'reus (Lat.), black-purple, 

 the colour of Sweet Scabious, 

 Scabiosa atropurpurea, Linn.; <~ 

 -violaceus (Lat.), very dark violet; 

 ~ -virens, ~ -viridis (Lat. ), dark or 

 blackish green, 

 atten'uate, attenua'tus (Lat. thinned), 



narrowed, tapered. 

 Att'ire, Grew's term for stamens and 



pistils. 



Attrac'tion-spheres, the same as At- 

 trac'tive-spheres, CENTROSPHERES, 

 or Tinoleucites. 



a'tus, a suffix indicating the presence 

 of an organ, thus : foli-atus, having 

 leaves. 



auc'tus (Lat. increased) ; (1) enlarged 

 after flowering, accrescent ; (2) 

 augmented by an addition. 

 Aug'ment-Cells, a modification of an 

 auxospore in Diatoms, after divi- 

 sion becoming transformed into 

 daughter-cells, and the starting- 

 points of new generations ; Aug- 

 menta'tion, increase beyond the 

 normal number of parts. 

 Aulae'um J (Lat., a curtain), used 

 occasionally for COROLLA by Lin- 

 naeus. 



Aulog'amae (auXos, a tube, ya.fj.o's, mar- 

 riage), employed by Ardissone for 

 Muscineae. 



Aul'ophyte (au\ri, abode, $VTOV, a 

 plant), one plant living in the 

 cavity of another for shelter 

 only, not parasitic ; the German 

 is " Raumparasit." 

 aurantia'ceous, auran'tiacus, auran'- 

 tius (Lat.), orange-coloured. 



26 



