rough 
Rust 
-lius (folium, » leaf), round- 
leaved. 
rough, (1) scabrous; (2) also of 
surfaces covered with stiff coarse 
hairs ; ~ Leaves, a gardener’s name 
for the first true leaves of a 
seedling ; rough’ish, scabrous. 
rubel’lus (Lat.), reddish. 
rub’ens (Lat.), blush-red. 
rub’eolus (N. Lat.), somewhat red, 
ruddy. 
rub’er (Lat., red), red in a general 
sense ; rubes’cent, rubes'cens, 
turning red. 
rubic’olous (rubus, a bramble, colo, I 
inhabit), parasitic on brambles, or 
attached to them; Henslow spells 
it rubico’lus. 
rubicun’dus (Lat., red, ruddy), blush- 
red, 
rub‘idus (Lat.), reddish; rubid’eus 
(Mod. Lat.), means about the 
same. 
rubig’inose, rubigino’sus, rubig’inous, 
rubigin'eus (robiga or rubigo, rust), 
rust-coloured, usually implying it 
is due to glandular hairs. 
Ruw'bor, Rube’do (Lat.), redness of any 
kind. 
ruderal, rudera’lis (from rudus, old 
rubbish), growing in waste places 
or among rubbish ; ~ Plants, those 
which are characteristic of rubbish 
heaps, etc. 
Ru’diment (rudimentum, a first at- 
tempt),(1) an imperfectly developed 
and functionally useless organ, a 
vestige ; (2) has been suggested as 
an equivalent of the German term 
“Anlage”; cf. Incepr, Prim- 
oRDIUM; rudimen’tal, rudimen’- 
tary, arrested in an early stage 
of development ; ~ Or’gans, those 
whose development has _ been 
arrested at an early stage. 
rufes’cent, rufes’cens (Lat.), becoming 
reddish. 
Ruffle, used by Withering for the 
Votva of Fungi; ruffled, with a 
strongly waved margin (Crozier). 
rufid’ulus (N. Lat.), somewhat red. 
rufous, ru’fus (Lat.), reddish, of all 
shades. 
Rw’ga, pl. Ru’gae (Lat.), a wrinkle 
or fold ; ru’gate, wrinkled. 
rug’ged, scabrous (Crozier). 
ru’gose, rugo’sus, ru’gous, covered 
with, or thrown into wrinkles ; 
ru’gulose, rugulo’sus, somewhat 
wrinkled. 
ru'minate, rumina’tus (Lat., chewed), 
looking as though chewed, as the 
albumen of the nutmeg; ~ En’- 
dosperm, mottled in appearance, 
due to the infolding of a dark 
inner layer of the seed-coat into 
the lighter coloured endosperm, 
run’cinate, runcina’tus (runcina, a 
large saw), saw-toothed or sharply 
incised, the teeth retrorse. 
Run’dle, used by Withering for 
Umszx ; and Run’dlet, for a partial 
or secondary umbel. 
Run‘ner, a stolon, an elongated lateral 
shoot, rooting at intervals, the 
intermediate part apt to perish, 
and thus new individuals arise ; 
running, repent, reptant. 
rupes'tral (rupes, a rock), H. C. 
Watson’s term for plants of walls 
and rocks; rupes‘trine (Crozier), 
rupes'tris, growing among rocks, 
or as Lichens, on rocks; some 
write it rupes’ter; Rupic’ola (colo, 
I inhabit), a plant which dwells 
among rocks ; adj. rupic’olous. 
rup’tile rup’tilis (ruptus, broken), 
dehiscing in an irregular manner ; 
ruptiner’vis, ruptiner’vius (N 
Lat.), when a straight-ribbed leaf 
has its ribs interrupted and 
swollen at intervals; rup’turing, 
bursting irregularly. 
rura‘lis (Lat., rustic), growing in 
peculiarly rural places as the thatch 
of a cottage. 
rus‘ciform (Ruscus, forma, shape), 
with leaflets recalling the shape of 
the phyllodes of Ruscus aculeatus, 
Linn. 
rus’sus (Lat.), red; russet, when 
meaning reddish-brown. 
Rust, a fungous disease in cereals 
caused by Puccinia graminis, Pers. ; 
it is also applied to other diseases 
of plants from similar attacks; 
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