1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C. 513 
MALVA. To the species, &c., described on pp. 318-9, 
Vol. II., the following should be added: 
M. campanulata (bell-shaped). A synonym of Malvastrum 
campanulatum. 
M. hastata (spear-shaped). . rosy-violet, borne on long 
stalks. Mexico (?), 1893. A garden annual. 
M. matritiana. The correct name is Lavatera cretica. 
M. miniata (scarlet). A synonym of Spheralcea miniata, 
described in Vol. ILL. 
M. moschata rosea (rose). 
time-honoured Musk Mallow. 
M. Munroana is synonymous with Spheraleea Munroana. 
A pretty pink variety of the 
-M. sylvestris (wood-loving). jl. dark pink or violet, veined, 
May to October. J. five- to seven- 
long-pedunculate, erect. 
h. lft. 
lobed, toothed. Stem erect, very slightly branched. 
to 1jft. Europe. Biennial. 
M. zebrina (striped), of gardens, is a pretty Mallow often found 
i rdens. It varies as to colour, but is usually white, striped 
with purple. It should doubtless be referred to M. sylvestris. 
M. Martensiana, a pink-flowered Australian species, has also 
been introduced. 
MAMESTRA PERSICARIZ. See Dot Moth. 
MAMMILLA. A small teat-like prominence. 
MAMMILLARIA. Anhalonium (which see) is 
now kept up as a distinct genus. With but few 
exceptions, all the cultivated Mammillarias may be 
grown in a warm, sunny greenhouse; or they may 
be placed in a frame with a sonth aspect, during 
summer, remoying them into artificially-heated quarters 
for the winter. They do not like a large body of 
soil about their roots, but always thrive best when in 
comparatively small pots. If a sweet, new, fibry loam, 
mixed with broken bricks or cinders, be used to 
pot these plants in, they may then be left undis- 
turbed at the root for several years. Much harm is 
often done to the more delicate kinds of Cactuses by 
repotting them annually. The pots should be well 
drained with ecrocks, and these covered with a layer of 
fibre sifted from loam. In summer, the soil should be 
kept moist, but never saturated; and after a bright, 
warm day, the stems may be moistened over by 
syringing them with tepid water. A point of much 
importance in connection with these, and indeed all 
tropical and extra-tropical plants, is, that the water 
used for watering or syringing them should be rain- 
water if possible, and never more than a degree or so 
colder than the plants themselves would be. Thus, a 
plant which had been standing in the full glare of a 
midsummer sun all day, would be much endangered by 
watering it with cold tap-water. Where proper arrange- 
ments for water are not made in a greenhouse or stove, 
it is a good plan to place the water wanted for the day’s 
use in the sun along with the plants. A little bag, filled 
with soot and a weight, tightly tied at the neck, and 
placed in the water, is a good method for rendering hard 
tap-water suitable for the roots of plants. In winter, 
Mammillarias may be kept quite dry at the roots, except 
in mild, sunny weather, when a little water may be 
given. M. vivipara is quite hardy in New York, as 
also are several other kinds, whilst we learn that by 
planting them out in summer, and protecting them by 
means of a frame from heavy rain, dews, fogs, and 
sudden changes of weather, a good many species of both 
Mammillaria and Echinocactus are successfully managed 
in the neighbourhood of that town. Doubtless M. missowr- 
iensis will also prove equally hardy. 
A collection of the most distinct kinds may be successfully 
managed in a glass case in a room window, providing 
_ the sun shines through it for a few hours in the day. 
Propagation is usually effected by means of seeds, 
which may be procured from Continental seedsmen, as 
well as from our own. The treatment required by the 
seeds is similar to what has been already advised for 
those of other Cactuses. The tufted kinds are easily 
multiplied by separating the stems, or even by cutting off 
the tops and planting them in small pots of sandy soil. 
Some of the kinds (more especially the small-flowered 
ones) are often prettily studded over with bright red, 
coral-like berries, which are the little fruits, and contain, 
as a rule, matured seeds capable of reproducing the 
parent plant. 
M. angularis is a robust kind, and when happily 
situated it forms a specimen Ift. in diameter, owing to 
Vol. V. 
Mammillaria—continued. 
its freely-produced arm-like branches, which spread out 
and curve upwards. It requires a warm greenhouse 
temperature during winter, and exposure to bright sun- 
shine at all times. M. applanata should be similarly 
treated. M. atrata, though rare in England, is worth 
attention becanse of the prettiness of its flowers and 
the attractive form of its stem. It will thrive in a cold 
frame, and requires protection from excessive wet only; 
rather than from cold. Grown in a warm house, it 
becomes sickly, and is short-lived. M. bicolor, one of 
the commonest of the Cactuses grown in English 
gardens, and one of the most distinct, if kept free from 
dust, which may be done by covering the plant with a 
bell glass, shows much beauty in the stem. It is one of 
the easiest to manage, and will thrive in a warm room- 
window if exposed to bright sunlight and kept dry in 
winter. M. chlorantha requires cool-house treatment, and 
should be kept free from dust, which disfigures the white 
spines. 
M. clava needs a warm greenhouse; but, unless it is 
kept in full sunshine both summer and winter, and 
perfeetly dry during the latter season, it will not produce 
any flowers. As a flowering plant, it ranks amongst the 
very best of the Mammillarias. It may be easily propa- 
gated from seeds ripened on cultivated plants. M. discolor 
thrives when grown on a dry shelf in a warm house, and 
kept moist in summer, but perfectly dry in winter. 
M. dolichocentra is a native of Mexico, and flowers in 
summer. It sueceeds in a tropical temperature, and 
enjoys a daily syringing oyerhead on bright days in 
summer, but in winter requires little or no water. A 
charming species is M. echinata, when grown in a warm 
house. few pieces of broken brick should be placed 
upon the surface of the soil about the base of the plant, 
as the stems like to press against, or grow upon, 
anything in the nature of rocky ground. 
Though rare in cultivation, M. Bchinus succeeds in a 
warm greenhonse, with exposure to bright sunshine all 
the year round, a moderate supply of water in summer, 
and none at all during winter. A few large pieces of 
broken brick or sandstone placed in the soil, just under 
the base of the stem, afford the roots conditions snitable 
to their healthy growth. M. elegans requires greenhouse 
treatment. 
M. elephantidens (see Fig. 550) grows quicker than is 
usual with plants of this genus, and it is also exceptional 
in the regular and abundant production of its flowers. It 
has been a rarity in Enropean collections for many years, 
and, although easily grown, it is often killed through 
wrong treatment. cool greenhouse or sunny frame in 
summer, plenty of water whilst growth is active, and a 
light, well-drained soil, suit it best; whilst during winter 
it must be kept perfectly dry, and protected only from 
frost. In a tropical house it is invariably sickly, and 
altogether unsatisfactory. 
MW. elongata and its varieties, densa, intertezta, rufescens, 
rutila, subcrocea, and swperterta may all be grown in a 
cold frame, or in a window where the sun can shine upon 
them; or they may be grown along with tropical kinds. 
For small cases in windows, these little Thimble Cactuses 
are amongst the most suitable. 
M. floribunda is a handsome kind for window culture, 
and, if well supplied with fresh air, sunshine, and sufficient 
water to keep the soil moist, it will flower almost every 
year. It must have no water in winter. : 
M. longimamma requires greenhouse treatment; or it 
may be placed in a sunny frame out of doors during 
summer. It is not easily multiplied from seeds, but is 
free in the production of offsets from the base of the 
stem. 
M. macromeris (see Fig. 552) is one of the most 
beautiful of all Mammillarias, and requires the same 
treatment as M. longimamma, except that, owing to the 
woody nature of its rootstock, and its long, tap-like roots, 
it should be planted in pans instead of pots, using a 
compost of rough loam, mixed with lumps of broken brick 
or limestone.  M..macrothele is almost hardy in the 
warmer parts of this country, suffering from damp rather 
than frost in winter. It should be grown in a cool, well- 
aired greenhouse or frame, with the sun shining on it all 
day. 3 A 
M. micromeris (see Fig. 545) and M. Ottonis are species 
that need much care under cultivation, water im excess 
3U 
