. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 416 UREDINEAE. P. Ravenelii Tliiiin. On Pinti^ (t, /'. oldongi.^porium). P. deformans Mayr. On I'iims viitii^ in Anifiiea. P. giganteum (Mayr). On Pi/iuK de/tsiyiora And J'. T/iunbe/r/ii iu Jii\ydu. Tills causes wry conspicuous deformation of its host (Figs. :249 and 2r)()V P. complanatum Barcl. On Pitms longifoU'i in India. The fnlldwiiiu- s])ceies frc(|uent other hosts: Peridermium conorum Thlini.^ This aee
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 416 UREDINEAE. P. Ravenelii Tliiiin. On Pinti^ (t, /'. oldongi.^porium). P. deformans Mayr. On I'iims viitii^ in Anifiiea. P. giganteum (Mayr). On Pi/iuK de/tsiyiora And J'. T/iunbe/r/ii iu Jii\ydu. Tills causes wry conspicuous deformation of its host (Figs. :249 and 2r)()V P. complanatum Barcl. On Pitms longifoU'i in India. The fnlldwiiiu- s])ceies frc(|uent other hosts: Peridermium conorum Thlini.^ This aeeidiuin first t'oinul by De IJarv in Thiiriu^ia, has recently been reported in Denmark, liussia, and America; also in Upper Bavaria Ijy v. Tubenf in September, 189"). It takes the form of two large aecidia, which make their appearance on the outer or inner side of the cone-scales of spruce. The white peridia break througli the epidermal tissues which then remain as a brownish sheath around each ruptured peridium (Fig. 251). The spores are separated by inter- mediate cells, and their outer coats are studded with poly- gonal warts. The cone-scales bearing aecidia contain a very large quantity of starch. Tel- eutospores of the species are unknown. Peridermium coruscans The mycelium of this fungus seems to perennate in twigs and buds of spruce. Twigs unfold from the bud as deformed, shortened, cone-like shoots bearing very short broad needles of a pale colour. The aecidia are produced on the deformed needles as broad lineal cushions with white peridia. They originate under the epidermis which tliey rupture, and break out on one side of the needle. 'Reess, Bosfpihformoi, 186!>. -Rostrup, VUlnisL (,'eld: For/iniHl/., jper Fio. ih\.— conoi-um-piceae. per, Peri dium; x/>, spore; sw, intermediate cells ; .fptr. sporophore; m, mvcolinm ; , prosenchvma, (After Reess.). Please note that these images are extracted from scanned page images that may h
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
