662 
EXTRACTS—FLORICULTURE. 
Removal of the affected part by the knife, and covering the wound with plaster, 
as recommended by Forsyth, is the most^ usual method by which a cure is at¬ 
tempted, and this, in some cases, seems to answer tolerably well, while in others 
it entirely fails.— 
Gangrene of Stems. —The disease just described is frequently the cause oi 
extensive gangrene, by which we mean, that the part loses entirely its vitality, 
and is in many cases; changed in its consistency, having its texture completely 
broken up in all cases the colour is changed, and generally to a reddish brown 
or black, but the texture is not always broke up. Gangrene seems to occur, for 
the most part, in consequence of wounds, parasitical plants, great heat in cold, 
excess or want of moisture, lightning, &c. Extremes of heat and cold, and 
sudden alternation of temperature, are frequent causes of gangrene in succulent 
stems and other parts of plants, as the leaves, flowers, &c.; and the hopes ot 
the gardener are often blasted by their influence, especially in the spring. The 
cherry, plum, and other stone-fruit trees, are subject to a species of gangrene 
which is generally called the “gum ” The affected branches must be removed 
as soon as possible, for the disease is very rapid in its progress.—Stems some¬ 
times become bark-bound, and this is supposed to arise from the cuticle not giv¬ 
ing way as it ought to do; trees in consequence become stunted in growth. It is 
sometimes cured by longitudinal incisions along the stems down to the alburnum. 
Natural Decay of Plants. —Like all other organized bodies, they are desti¬ 
ned to exist but for a time; some for less than a day, others for more than a 
thousand years; but all are subject at last to decay, each having certain functions 
to perform, that the continuation of the species may be insured, natural decay 
never comes on till this process is completed ; so that any means used to coun¬ 
teract natural decay, must be practised with a constant reference to that fact.— 
R. SriTTAL, Esq. — Cal. Hort. Trans. 
HORTICULTURAL INTELLIGENCE. 
New and very Rare Plants, figured in the Botanical Periodicals for July. 
CLASS I.—DICOTYLEDONOUS PLANTS, OR EXOGENES. 
LEGUMINOSjE. 
Hov'ea villo'sa. Shaggy Hovea. The nearest relationship of this species is 
the H. purpurea, from which it differs in being excessively, instead of being 
merely covered with a very short dense pubescence. Flowers purple ; native of 
New Holland. Culture.—It requires an airy greenhouse, flowers in April, and 
is easily propagated by cuttings grown in sandy peat.— Bot. Register. 
Chorize'ma triangul'are. Triangular Chorizema. Flowers scarlet, 
mixed with bright orange. Native of the south-west coast of New Holland, where 
the seeds were found by the collector, Mr. Baxter. Culture.—A delicate green¬ 
house plant, requiring a very airy dry shelf in the winter, and is increased freely 
by cuttings.— Bot. Register .—The soil suitable is sandy peat. 
