. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CYSTOPUS. 127 observed on Crqisella may be summarized here: the fungus attacks all parts above ground, and causes enlargement of parenchymatous cells ; it forms only conidia; formation of chlorophyll is increased; the formation of interfasci- cular cambium is diminished or altogether suppressed ; the intrafascicular cambium retains its activity longer; accessory vascular bundles make their appearance ; cX^v^^^i^^^^'^^
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CYSTOPUS. 127 observed on Crqisella may be summarized here: the fungus attacks all parts above ground, and causes enlargement of parenchymatous cells ; it forms only conidia; formation of chlorophyll is increased; the formation of interfasci- cular cambium is diminished or altogether suppressed ; the intrafascicular cambium retains its activity longer; accessory vascular bundles make their appearance ; cX^v^^^i^^^^'^^^ no differentiation of tissue takes place in the ovary wall, the secondary vessels remain incomplete, and the embryo dries up. C. portulacae, D. C. On Portulaca oleracea and P. sativa (U. S. America). C. tragopogonis, Pers.^ (C. spimilos^is) (Britain and U. S. America). On Compositae, Chamomilla., Achillea, Cirsium, Scorzonera, etc. The markings on the spore-coat take the form of a double net-work. C. convolvulacearum, Otth. (C ipomoeae-pandiu-anae, Farl.). On Con- volvulaceae. (Halsted" gives this as one of the causes of rot in sweet potato in America.) C. bliti (). On species of Amarantaceae (U. S. America). C. lepigoni, de Bary. On Spergularia (Britain). Basidiophora. The non-septate mycelium inhabits intercellular spaces of living plants, and is nourished by small haustoria. The conidio- phores issue in tufts from the stomata, and have a characteristic form; they are unbranched with club-shaped ends, from which arise several sterigma-like conidiophores with almost spherical conidia. The conidia or sporangia are produced in large numbers, and on germination discharge numerous zoospores with two lateral cilia. The oospores are formed singly in the oogonia, and appear as yellowish-brown bodies in the interior of the plant. Basidiophora entospora, Roze and Cornu. On Erigeron ccma- dcnsc, , Solidago, etc. (Britain and U. S. America). Plasmopara. The my
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
