archoplasmic 
arthrosporous 
PLASM; adj. archoplas’mic ; ~ 
Sphere =achromatic spindle. 
arct‘ic, a term applied by H. C. Wat- 
son to a British region, compris- 
ing three zones, styled super-, mid-, 
and infer-arctic zones, relating to 
plants growing above the limits of 
cultivation. 
arc'uate, arcua’tus (Lat.), bent like a 
bow, curved ; arcua’‘to-areola’tus, 
divided into spaces by curves ;~ 
contort’us, forming a depressed 
spiral, as in some legumes. 
Ardell’a (dpdw, I sprinkle), small 
apothecia of certain lichens, as 
Arthonia, seemingly dusty. 
A’rea (Lat., a space), (1) a bed in 
botanic gardens; (2) in Diatoms, 
the surface of a valve when circular 
and destitute of a stauros ; (3) ¢ the 
receptacle of certain Fungi (Lind- 
ley). 
arena’ceous, arena’rious, arena’rius, 
areno’sus (arena, sand), growing in 
sandy places. 
Are’ola (Lat., diminutive of AREA); (1) 
a space marked out on a surface ; 
(2) a small cell or cavity; (3) a 
tessellation in the thallus of some 
Lichens; ar’eolar, ar’eolate, areola’ - 
tus, marked with areolae, divided 
into distinct spaces; Areola’tion, in 
Mosses, the arrangement of the 
cells. 
arg’entate, argent’cus (Lat., silvery), 
silvery as to tint and lustre; 
argenta’tus (Lat.), silvered. 
argilla’ceous, -ceus (Lat.), clayey, 
growing in clay, or clay-coloured ; 
argillo’sus (Lat.), living in clayey 
places. 
arg’os, in Greek compounds=white ; 
in Latin, candidus. 
argute’, argu'tus (Lat.) sharp, 
argute’-serra’tus sharply serrate. 
are’yros, in Greek compounds =sil- 
very; Lat., argenteus. 
arhi’zal, arhi'zus (a, without ; plfa, a 
root), rootless, wanting true roots; 
Arhizoblas'tus + (GAacros, a germ), 
an embryo which has no radicle. 
Aricine, an alkaloid from cinchona 
bark, obtained from Arica, in Chili. 
as 
23 
ari/nus (dppnv, male), Necker’s suffix 
to words enumerating stamens, in- 
stead of the Linnean -androus. 
A’ril, Arill’us (Fr., arille), an expan- 
sion of the funicle, arising from the 
placenta, and enveloping the seed, 
mace is the aril of the nutmeg ; 
arillate, arilla’tus, possessed of an 
aril; arilliform’is + (forma, shape), 
bag-shaped ; A’rillode, Arillo’dium, 
a false aril, a coat of the seed, and 
not arising from the placenta. 
Aris‘ta (Lat.), an awn, the beard of 
corn; arist/ate, arista’tus, awned ; 
aris'tulate, aristula’tus, bearing a 
small awn. 
aristolochia’ceous, resembling the 
genus Aristolochia, Tourn. 
Ar’ma (Lat.), Ar’mature, any kind of 
defence, as prickles or thorns ; 
armed, bearing thorns or similar 
defence. 
armenia’ceous,armen'iacus, (1)apricot- 
coloured, a dull orange, named from 
Prunus Armeniaca, Linn.; (2) a 
native of Armenia. 
Armill’a (Lat., bracelet), the frill of 
the stipe of Agarics left attached 
on the expansion of the pileus, at 
first it forms a covering of the 
hymenium. 
Arnat’to, also written, Arnotto and 
Annotto, the red colouring matter 
from the pulp of the fruit of 
Bixa Orellana, Linn. 
Aro’ma (Lat., spice), the perfume of 
a plant ; aromat‘ic, -cus, possessing 
a spicy smell or taste. 
arrect’, arrect'us (Lat. set upright), 
stiffy erect. 
Arrest’, sporal, see SPoRAL ARREST. 
arrhi’zous = ARHIZOUS, etc. 
Ar’row-head’ed, ~ shaped, barbed like 
an arrow, sagittate. 
arth’onoid, of the form or consistence 
of the apothecia in the genus 
Arthonia, Ach. 
Arth’rospore (dpOpov, a joint, oropa, a 
seed), one of spores like a chain of 
beads, formed by fission; arthro- 
spor’ic, arthrosp’orous, applied to 
Schizomycetes, in those species 
which have no endogenous spores 
