. CAEOMA. 419 leafless shoots on dolabrata in Japan, whence they were sent to me (Figs. 254 and 255). One example (not figured) was as large as a young child's head. The shoots of the witches' brooms are furnished with vascular bundles and possess a parenchyma rich in starch-content. Each branch of the deformed shoot termi- nates in a hemispherical saucer-shaped /.Y<fo?««-cushion, at first covered over by the epidermis, but with no peridium. The caeowia-discs are at first brown, but after the epidermis bursts and rolls back, the yellow dusty spores appear. The spores Fif- rob.â
. CAEOMA. 419 leafless shoots on dolabrata in Japan, whence they were sent to me (Figs. 254 and 255). One example (not figured) was as large as a young child's head. The shoots of the witches' brooms are furnished with vascular bundles and possess a parenchyma rich in starch-content. Each branch of the deformed shoot termi- nates in a hemispherical saucer-shaped /.Y<fo?««-cushion, at first covered over by the epidermis, but with no peridium. The caeowia-discs are at first brown, but after the epidermis bursts and rolls back, the yellow dusty spores appear. The spores Fif- rob.â defor- ^ ^ . mans. Portion of the pre- arise serially from very short basidia; they ceding figure enlarged to â ^ "^ . ./ show the Caeoi/io-discsonthe are vellow and have striped membranes. ends of twigs, (v. Tubeuf mi ⢠del.) The witches' brooms also exhibit marked hypertrophy (Fig. 254). In the supporting branch both wood and bark are considerably increased. Large meiUillaryrays occur in the wood, and nests of thin-walled parenchyma are interpolated between the regular tracts of tracheae, so that the general arrangement resembles that shown in juniper by Wornle's researches on Gijmnoqjorangium. The parenchymatous groups of cells in the wood appear to the naked eye as brown spots. They are permeated by a vigorous intercellular mycelium, which sends off' large haustoria into tlie adjacent cells. Caeoma laricis (Westeiid).^ On needles of Larix. (Britain.) C. orchidis A. et S. On orchids. (Britain.) C. chelidonii Magn. On Ckelidonium majus ( America). C. fumariae Lk. On Corydalis. C. euonymi (Gmel.). On Euonymus eiiropaeus (Britain). C. confluens (Pers.). On Rihes alpiimm, R. ruhntm, etc. C. nitens (C. himinatum) is the well-known Blackbei'ry-rust so common in the United States. It is probably a form of Puccinia Peckiana.'- C. aegopodii (Eebent.). On Aegopodium Podagraria and Cliaerophyllum aromatic/'III. C. ligustri (Rabh.). On Ligustrum vidgare. C. ari
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
