. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE. Mjrxogastrales (p. 5) This order comprises some forty-seveij genera and four iiun- dred species of great variety and beauty. The plasmodium, which varies from a millimeter or less to several decimeters in diameter, pro- duces either flat encrusted masses of ""^ '''^"^ spores, aethalia, or develops spores in \ ^^J^ sporangia which show some superficial f^X-^'''' ^â '' resemblance to very small puffballs, Fig. 2. The interior of the sporan- ---iitJ gium is often permeated by a threa
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE. Mjrxogastrales (p. 5) This order comprises some forty-seveij genera and four iiun- dred species of great variety and beauty. The plasmodium, which varies from a millimeter or less to several decimeters in diameter, pro- duces either flat encrusted masses of ""^ '''^"^ spores, aethalia, or develops spores in \ ^^J^ sporangia which show some superficial f^X-^'''' ^â '' resemblance to very small puffballs, Fig. 2. The interior of the sporan- ---iitJ gium is often permeated by a thread- â ^^°um;Tp<rre?c"aTc''ar°eous'c^- like structure, the capillitium. They t'^'^- After Mac bride. are not parasites but occasionally injure plants by overgrowing them. Key to Families or Myxogastrales Spores not enclosed in a sporangium, borne externally upon the fruiting 1. Ceratiomyxaces. Spores enclosed in a sporangium Capillitium wanting, or very poorly de- v«loped Periderm of uniform thickness, rup- turing irregularly 2. Liceaces. Periderm of unequal thickness Periderm with a subapical thin line, opening by an operculum 3. Orcadellaceae. Periderm unequally thick above, the thin portions evanescent, leaving a network formed by the thicker portions 4. Cribrariacete. Capillitium well developed Calcareous deposits absent, or rarely present in the periderm Capillitium of hollow, usually sculp- tured threads; spores light colored 5. Trichiacese. Capilhtium of solid, smooth and usually much branched threads; spores dark colored Fruiting bodies sethalioid or in-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
