Elementary botany . body with a sterile base, which proliferates ..•••?•>;. and forms a new sporangium in the old one(Harpochytrium), or with slight develop-ment of mycelium in aquatic plants (Cla-dochytrium). Some are parasitic in leavesand stems of land plants. Synchytriumdecipiens is very common on the trailinglegume, Amphicarpasa monoica. 434. Order Ancylistales (Ancylistinese).—The members of this order have a slightdevelopment of mycelium and many areparasitic in algae (Lagenidium, fig. 249). 435. Order Saprolegniales (Saproleg-niinese).—These include the water molds(Saprolegnia). See
Elementary botany . body with a sterile base, which proliferates ..•••?•>;. and forms a new sporangium in the old one(Harpochytrium), or with slight develop-ment of mycelium in aquatic plants (Cla-dochytrium). Some are parasitic in leavesand stems of land plants. Synchytriumdecipiens is very common on the trailinglegume, Amphicarpasa monoica. 434. Order Ancylistales (Ancylistinese).—The members of this order have a slightdevelopment of mycelium and many areparasitic in algae (Lagenidium, fig. 249). 435. Order Saprolegniales (Saproleg-niinese).—These include the water molds(Saprolegnia). See Chapter XIX. 436. Order Monoblepharidales (Mono-blepharidineee).—These are peculiar watermolds, related to the Saprolegniales, butmotile sperm cells are formed (Monoble-pharis, etc., fig. 250). 437. Order Peronosporales (Peronospori-nese).—These include the downy mildews(Peronospora, Plasmopara, Phytopthora,etc.), and the white rust of crucifers andother plants (Cystopus= Albugo), Chapter XIX. 0 0. Fig. insignis Thax-ter. End of hypha bearing oogo-nium (oog) and antheridium (ant)Sperms escaping from antheridiumand creeping up on the oogonium.(After Thaxter.) 2. SUBCLASS ZYGOMYCETES. 438. These are the conjugating fungi. 439. Order Mucorales (Mucorineae).—This includes the black mold andits many relatives (Mucor, Rhizopus, etc.). Chapter XIX. 440. Order Entomophthorales (Entomophthorineae).—This order in-cludes the fly fungus (Empusa) and its many relatives parasitic on insects. 2l6 MORPHOLOGY. In the autumn and winter dead flies are often found stuck to window-panes,with a white ring of the conidia around each fly. II. Class Ascomycetes. (The ascus series.) 1. SUBCLASS Order Hemiascales (Hemiascineae).—Fungi with a well developed, septate mycelium, butwith a sporangium-likeascus, , a large andindefinite number ofspores in the ascus. Ex-amples : Protomycesmacrosporus in stems ofUmbelliferae, or P. poly-sporus in A
Size: 1123px × 2225px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoratk, bookcentury1900, bookdecade1900, booksubjectbotany
