FLORA AND SYLVA 
ent spots. The pale yellow spathes bearing a 
large purple eye are much folded, and only 
expand slightly to a short blunt tip. 
R. Pentla7idu. — The largest and brightest in 
colour of the Yellow Arums, found in the 
mountains of Basutoland and the Orange 
Free State, and first flowered in 1892 in the 
garden of Pentland House, Lee. Of un- 
certain origin, these first plants aroused wide 
interest and much diff'erence of opinion as 
to their relation to Elliott's Golden Arum, 
whose appearance was still fresh in mind ; 
other tubers, however, found their way to 
Kew from a different source, leaving no 
further doubt of their specific rank. The 
plant is beautiful and vigorous, and the largest 
of any in leaf and flower. It is sturdy in 
habit, and the leaves are more pointed than 
in other kinds, and of a uniform dark green 
(save upon the stalks, which are much spotted 
with red), and thick and tough in texture. 
The trumpet-shaped flowers, very broad and 
of intense colour, are of rich golden-yellow 
within, somewhat paler without, with a blotch 
of purplish-black at the base of the spathe, 
which differs much as to size in different 
plants. The tubers are round and flat, and 
are found growing at a depth of 8 to 1 5 
inches among the rocks and boulders of the 
mountain side, drying off completely during 
the hot season. Under cultivation, its needs 
are constant heat and moisture, with a regular 
season of rest after growth is matured ; it 
cannot do with the cool treatment that suits 
the White Arum, and to this error in culti- 
vation its early failure in many gardens was 
due. In parts of Europe with a hot summer, 
the Yellow Arums are easily flowered in the 
open from rested tubers planted in spring, but 
in Britain the practice is to pot the roots in 
February, and grow them in an intermediate 
house with constant heat until summer is well 
advanced, when, with a lower temperature and 
less water, they go gradually to rest. Though 
normally in beauty during early summer, it 
is possible to have it in flower at almost any 
season by changing its time of rest. The 
plants seed freely, this being the best means of 
increase. Syn. R. aiigustiloba. 
Varieties. — A seedhng variety with spathes 
of apuresulphur-yellow colour has been raised. 
Other colour varietiesfoundamongthefirst im- 
ported roots flowered in the gardens of Lord 
RothschildatTring Park. 0{xht%Q,R.P .suffusa 
is a dwarf plant of fine vigour and habit, bear- 
ing spathes of creamy-white suffused with rich 
violet-purple towards the base ; while the 
second kind, known as the Tring Park variety, 
has spathes of deep gold approaching orange, 
with the same dark eye within, and a few 
translucent leaf blotches after the manner of 
R. Elliottiana. Other plants, with more or 
less of these white leaf-marks, have been dis- 
tinguished as R. Pentlandii maculata. 
R. Rehmajinl — A plant discovered by Reh- 
mann in Natal, and unlike any other kind in 
its rounded Canna-like leaves and the colour 
of its spathes. Under the powerful African sun 
these are of dull rose, shading to rosy-purple 
within, but to the disappointment of growers 
this deep colour is not seen in Europe, a faint 
rosy flush upon the outside and the edges being 
the only tracesofitslatent presence, while often 
the flowers of creamy-white are devoid of even 
this colour. The spathes are small and neat, 
very like those of the White Arum in shape, 
but only 4 inches long with a narrow tip ; the 
leaves exceed the flower-stems, and are spotted 
with long, narrow streaks of white running 
parallel with the veins. It is hoped by crossing 
to regain the rosy colour of the wild plant lost 
under cultivation, and the measure of success 
already attained is shown in Mr. Lynch's new 
hybrid. A strong form of this species is offered 
2i%robusta,\i\)X though of good habit the spathes 
still ishow no trace of colour. 
R. Sprenger'i. — A new and rare plant from 
Griqualand and the Transvaal, first flowered 
bySprengerof Naples in 1900. It belongs to 
the group of Yellow Arums, now so numerous, 
and at its best is equal to any in size and rich 
colour, while it differs from all in its form of 
leaf and the wide funnel shape of its open 
spathes, which are broader than in any other 
species. The leaves are about 9 inches long 
and one-third as wide, with conspicuous veins 
and numerous white dots, while occasionally 
they are variegated with white in addition. 
The spathes vary in colour from rich, clear 
yellow to sulphur and creamy-white, and are 
freely produced in the open during the south- 
ern summer. B. 
