. Agricultural botany, theoretical and practical. Botany, Economic; Botany. 740 FUNGI stems of beans and vetches, the uredospore and teleutospore-sori being round or oval of chestnut-brown colour. (b) Uromyces BetcR Pers., is a common parasite on garden and sugar beet, mangel, and wild sea-beet. The ^cidiospores are rarely met with except on the petioles and young leaves of 'seed'-beets in spring, but uredo- spores and teleutospores are freely produced in summer on the ordinary mangel crop, their re- spective sori being roundish and. F,c. .^, Uredospo^-sorlof mangel of brOWn ColoUr (Fig. 2
. Agricultural botany, theoretical and practical. Botany, Economic; Botany. 740 FUNGI stems of beans and vetches, the uredospore and teleutospore-sori being round or oval of chestnut-brown colour. (b) Uromyces BetcR Pers., is a common parasite on garden and sugar beet, mangel, and wild sea-beet. The ^cidiospores are rarely met with except on the petioles and young leaves of 'seed'-beets in spring, but uredo- spores and teleutospores are freely produced in summer on the ordinary mangel crop, their re- spective sori being roundish and. F,c. .^, Uredospo^-sorlof mangel of brOWn ColoUr (Fig. 250) rust (^Uromyces Bette Pers.) (enlarged about 6 diameters); 5, teleutospore of A heteroecious species, namely mangel rust; C teleutospore of bean UrOMVCeS PtSt YeXS., is a frCQUent rust {Uromyces FabcB Pers.). {B and C ^ ^^ ^ enlarged 320 diameters.) pest of the pea CrOp. ItS Secidio- spores are produced on the spurge, Euphorbia Cyparissias L. Ex. 309.—Examine the sori of Uromyces Beta and U. Faba with a pocket lens ; make drawings. Scrape off with a penknife uredospores and teleuto- spores of each ; mount in water and examine with high power. Observe that both uredospore and teleutospore are unicellular ; note the differences in the surface and thickness of the cell walls of the respective spores. Series B.—Autobasidiomycetes. II. The Autobasidiomycetes or second series of the Eubasidii are characterised by their undivided unicellular basidia which are club-shaped or cylindrical. Each basidium generally bears at its apex four slender sterigmata on the end of which single basidiospores are produced. More than 10,000 species of fungi are included in this series. Most of them display considerable complexity of organisation, and by far the larger number, such as mushrooms, toadstools, and puff-balls are saprophytes, although a few are destructive parasites of forest trees. The Common Mushroom {Agariais campestris \,. = Psalliota. Please note that these images are extracted
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
