asymmetric 
aurantiaceous 
asymmet’ric, asymmet’rical (a, not, 
ovpperpos, 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, civ, together, 
yduos, 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, rdés, order, 
ddyos, discourse), teratologic, ab- 
normal structures not represented 
among plants in a normal con- 
dition, as Fasciation, Chloranthy, 
ete, 
a‘ter (Lat.), pure, lustreless black ; 
in composition, atro-. 
athal’amous (a, without, @ddapos, 
bride-chamber), said of Lichens 
without apothecia on their thallus. 
athall’ine (a, without, Qadddos, young 
shoot), without thallus, 
Ath’era (d0np,-épos, beard of corn), 
in Greek compounds=awn or stiff 
bristle. 
Atlant’ic type of Distribution, 
Watson’s term for British plants 
which occur most frequently to- 
wards the west of Great Britain. 
Atom (a, not, réuwyw, I cut), de- 
fined by Nageli as the ultimate 
article of a chemical element; in 
otanic parlance it means the 
smallest divisable portion of any 
substance. 
Atomogyn’ia (drouds, cannot be cut, 
yuvh, woman), the elder Richard’s 
name for the ANGIosPERMIA of 
Linnaeus. 
Atracten’chyma t (drpaxros, a spindle, 
éyxuua, 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 
Carez, the apex of the glumes 
26 
being darkened ; atric’olor (co/or, 
colour), inky-black. 
at‘ropal, preferably at’ropous (a, not, 
Tpowh, a turn), a synonym of oR- 
THOTROPOUS ; applied to the ovule. 
At’rophy (a, without, tpo¢i, nourish- 
ment), wasting away, abortion or 
degeneration of organs ; Atrophy’- 
tes (g@urov, 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 { (Lat., a curtain), used 
occasionally for CorotLa by Lin- 
naeus. 
Aulog’amae (a)Ads, a tube, -yduos, mar- 
riage), employed by Ardissone for 
Muscineae. 
Aul'ophyte (ai\}, abode, gurdvy, a 
plant), one plant living in the 
cavity of another for shelter 
only, not parasitic; the German 
is ‘“‘ Raumparasit.” 
aurantia‘ceous, auran’tiacus, auran’s 
tius (Lat.), orange-coloured,, 
