The painful wound is speedily discoloured and swollen.
Spotted Leaves, &c.Discoloured spots or patches on leaves and other herbaceous parts are common symptoms of disease, and often furnish clues to identification of causes, though it must be remembered that no sharp line divides this class of symptoms from the preceding.
Spotted and discoloured straws are dyed either in pipe or in plait.
Portion of twig with discoloured patches, caused by the fungus.
Zn(OK)2] Zinc oxide is used in the arts as a white pigment (zinc white); it has not by any means the covering power of white lead, but offers the advantages of being non-poisonous and of not becoming discoloured in sulphuretted hydrogen.
Olpidium Brassicae; others discoloured spots and even tumour-like swellings - e.g.
In summer specimens of this species, as with other white furred animals, have slightly discoloured coats.
The rays had to struggle through a disturbing medium; they reached him refracted, dulled and discoloured by the thick gloom which had settled on his soul, and, though they might be sufficiently clear to guide him, were too dim to cheer him.
White or grey spots may be due to Peronospora, Erysiphe, Cystopus, Entyloma and other Fungi, the mycelium of which will be detected in the discoloured area; or they may be scale insects, or the results of punctures by Red-spider, &c. Yellow spots, and especially bright orange spots, commonly indicate Rust Fungi or other Uredineae; but Phyllosticta, Exoascus, Clasterosporium, Synchytrium, &c., also induce similar symptoms. Certain Aphides, Red-spider, Phylloxera and other insects also betray their presence by such spots.
These do not drop, but as the grubs develop the cotton is ruined and the bolls usually become discoloured and crack, their contents being rendered useless.
The rubber is of good quality, though, owing to the method of preparation adopted, the product is often impure and discoloured, and consequently usually brings a lower price than the best rubbers of commerce.
When the disease reaches an advanced stage the leaves are discoloured, yellow or reddish, with their edges turned back, and withered.
Uromyces Erythronii, a rust, sometimes causes considerable injury to the foliage of species of Lilium and other bulbous plants, forming large discoloured blotches on the leaves.