agrestal 
Albumoses 
the field). H. C, Watson’s term for 
the cultivable portion of Great 
Britain ; ~ Region, divided into three 
~ Zones, the super-, mid-, and infer- 
agrarian zones. 
agrest’al (agrestis, belonging to the 
field) ; (1) Watson’s term for plants 
growing in arable ground ; (2) rural 
generally. 
agricult’ural Bot/’any (agricultura, 
husbandry), that part of economic 
botany which relates to farm plants. 
Agrostog’raphy (d&ypworts, grass, ypagy, 
writing), the description of grasses ; 
Agrostol’ogy (Adéyos, discourse), the 
botany of grasses. 
agyna‘rius + (a, without, yur, a 
woman); agyn’icus; (1) said of 
stamens which are free from the 
ovary ; (2) pistils wanting, desti- 
tute of pistils ; ag’ynous, monstrous 
flowers with pistils missing. 
Ai’gret (Fr. Aigrette, tuft of feathers), 
the pappus of Compositae; Eng- 
lished by T. Martyn as E’gret. 
aiophyl’lus (alwv, eternity, vAor, 
a leaf), evergreen. 
aima, in Greek compounds=blood- 
coloured; properly hema (from 
alua, blood), 
Air-Blad’ders, intercellular spaces in 
some Algae, serving as floats; ~ 
Cavity = ~ CHAMBERS (2); ~ -Cells, ~ 
-Chambers, (1) intercellular spaces 
occurring in aquatic plants, usually 
prismatic in form, (2) the inter- 
cellular space beneath a stoma; ~ 
Passage, = ~-CHAMBER; ~ -Plants, 
epiphytes, as Bromeliads and some 
Orchids; ~Pore,=Stoma; ~Sacs, 
cavities in the pollen-grains of 
Pinus; ~ Vessel, term formerly 
applied to empty tracheids, etc. 
Akene’, Ake’nium, = AcHENE, ACHEN- 
IUM. 
Akine’sis (a, without, «lyyo.s, move- 
ment), increase without the phenom- 
ena of karyokinesis ; A’kinetes, in 
green Algae, single cells whose 
walls thicken and separate from 
the thallus, corresponding to the 
chlamydospores of Fungi ; immotile 
reproductive cells, formed without 
true cell-formation, or rejuvene- 
scence. : 
A’la (Lat. wing), (1) formerly an axil, 
but now obsolete in that4ense ; (2) 
a lateral petal of a papilionaceous 
flower ; (3) a membranods expansion 
of any kind, as in the seed of 
Bignoniaceae; (4) émployed by 
Wm. Smith for the’ marginal pro- 
cesses in Surtrellas (5) the outer 
segment of the coral lobes in some 
Asclepiads ; (6) iv Mosses, the a/lar 
cells are those st the basal angle 
of a leaf. 
Alabas’trum (Lat,/bud), a flower-bud. 
a/lar, ala'ris (alaj wing), (1) formerly 
RIS; (2)~Cells, cf. 
petiole; alstepinna’tus, when the 
common p¢iole of a pinnate leaf is 
marginally winged. 
alba’tus (Lit.), whitened; Albe’do 
(Lat.) whjeness; Albefac’tion (facio, 
I make}, blanching; albes’cent, 
; al'bidus, —albin’eus, 
; Al’binism, a disease from 
abserfe of normal colouring, dis- 
playitg itself as an Albi’no; albi’nus, 
al’‘puus (Lat.), somewhat white. 
n (Lat., white of an egg), the 
nutfitive material stored within the 
see, and in many cases surrounding 
th¢ embryo. (Notz. Not to be 
coffounded with animal Albumen.) 
Ajoumin, in plants, the proteids 
ich readily coagulate from their 
ueous solutions by the action of 
eat or acids; Albu’minoids (eldos, 
esemblance), nitrogenous organic 
ubstances, proteids; albumino’se, 
albu'minous, albumino’sus, contain- 
ing albumen, a term restricted to 
seeds ; Albu’minates, nitrogenous 
substances insoluble in water, 
soluble in dilute acids or alkalis, 
e.g., gluten of wheat; Albumo’ses, 
similar to albuminates, but soluble 
in water ; common constituents of 
aleuron. 
