First report of the Board of State Horticultural Commissioners .. . I introduce a copy of Professor Farlows engraving, for which I amindebted to the publishers of the Pacific Rural Press. Professor Far-low says, speaking of specimens of smut he obtained from oliveleaves: The black substance, when seen with a magnifying power of four hundred diameters, is foundto be composed of the stellate hairs of the olive, over which grows the fungus, to the dark colorof whose mycelium the spots owe their color. The mycelium is very variable in a rule it is composed of moniliform hyphse, whose
First report of the Board of State Horticultural Commissioners .. . I introduce a copy of Professor Farlows engraving, for which I amindebted to the publishers of the Pacific Rural Press. Professor Far-low says, speaking of specimens of smut he obtained from oliveleaves: The black substance, when seen with a magnifying power of four hundred diameters, is foundto be composed of the stellate hairs of the olive, over which grows the fungus, to the dark colorof whose mycelium the spots owe their color. The mycelium is very variable in a rule it is composed of moniliform hyphse, whose cells are .006 mm. by .008 mm., and insome places almost spherical. These bodies called hyphse are seen at Fig. Id, where they grow soclosely as to form a sort of membrane, which extends parallel to thesurface of the leaf and forms the chief part of the black substance 93 which may be scraped or washed from the leaves. Besides thesemultitudinous oval or spherical bodies seen with the microscope,there are larger forms, as shown in Fig. 1 at a a a. They are termed. stylospores. They are flask-shaped bodies, extending above the massof the mycelium by which they are surrounded. They may be easilyseen with a good magnifying glass, as the black projecting necks aretolerably conspicuous. They vary much in shape, and have forks,branches,and swellings, as shown in the engraving, Fig. 1 c, and fromthem are liberated spores, as shown at Fig. 1 b. Other forms of the 94 fungus are shown in Fig. 3; a a, are bodies termed picnidia, whichare quite numerous. They consist of a membraneous sac, of a blackcolor, which contain the small bodies, which are represented as beingdischarged at a. Still another form of the fungus is shown in Fig. 3d d. These are one form of bodies, called conidia. The ordinarycells of the mycelium divide by cross partition into two parts, whichdo not grow to the same shape as the mother cell, but remain twoby two, as shown in the figure, the hyphse becoming zigzag, andfi
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfruitculture, bookyea
