314 
Reviews and Extracts. — Horticulture. S^c. 
bucket of the common pump : this clack admits the water, and closes securely 
when the Dispatcher is filled, is an upper valve, which is raised by the up¬ 
ward pressure of the air, as the' water rushes in at a, and as soon as the water has 
risen to the height of the cover, (c) the valve (b) falls, and enables the user to take 
the Dispatcher where he pleases. The clack will not allow a drop of water to 
escape from beneath it. 
2.—Flora and Pomona. By C. Mc.Intosh,C.M.H.S., &c. 8vo. 
coloured, 1.9.8(/. 
Part 26, for December, 
Contains a figure of the Polygala speciosa, Showy Milkwort.—(Polygitleae.)— 
This beautiful species is now pretty well known in our greenhouses ; it was intro¬ 
duced from the Cape, in 1814. It is very impatient of damp, and is easily injured 
by either cold or drought. It strikes from cuttings of the young wood, taken off 
as close as possible to the old, so as to allow a portion of it to be attached to the 
cutting : plant them in a pot of fine sand, and cover them with a bell glass, place 
them in a dry shady frame, &c., and shade them from the heat of the sun. 
Metrosideros specidsus, Showy Metrosideros.—(Myrtaceae.)—This splendid spe¬ 
cies was introduced from New South Wales, in 1823. Its scarlet flowers are 
justly considered a great ornament to our conservatories. It is chiefly propagated 
by seeds, which have the property of retaining their vegetative powers for 
several years. The seeds succeed best if sown in finely sifted sandy peat, and 
placed either in a cool shaded frame, or^on a shaded shelf in the greenhouse. 
Sweet, in his Botanical Cultivator, says “Cuttings may be rooted, but not without 
difficulty, taken off in the ripened wood, and planted under a bell-glass in sand.” 
Or the Propagation of Bulbous-rooted Plants. —As many are found to be very 
difficult to increase, as the Crhiurn amdbile, Cyrtdnthns oblzquus^ Brunsingia 
jiuxubsa, Brunsingia Josephince, to ofrviate this apparent defect, the Editor 
recommends cutting off the top of the bulb, in spring, close to the quick, that is, 
sufficiently deep to destroy the heart of the bulb, whence the flower-stems, and 
leaves proceed: by this check offsets will be formed j it is necessary, however, 
to be careful that no water be allowed to stand in the hollow part of the bulb, and 
as a primary precaution, it is recommended to invert the plant, that any moisture 
proceeding from the wound may escape^ if it has a tendency to decay, pounded 
charcoal may be applied once a day, or every other day. 
On the Propagation of the Genus Rtibus. —Those of this Genus that do not 
root freely when laid in the usual way, may be readily struck, if the point of the 
shoot be placed about an inch in the ground. The sap thus checked, will form a 
callosity or bulb-like appearance, from whence roots will soon issue, which when 
they have, it may be separated from the parent. 
On the Propagation of the Asclepias tuherosa. —The system recommended is to 
graft the tops of the roots, each having a bud or eye, upon the roots of any of the 
more common and hardy species of Asclepias. 
