. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 488 FUNGI IMPERFECTI. Faded spots appear on the leaves, becoming later greyish brown dotted over with minute black points, the couidial patches.' C. ampelinum Cav. causes little dry spots on the leaves of vine, fre- quently in such numbers that the whole leaf dries up. C. kentjae Hals, attacks palm-seedlings so that their leaves do not unfold. C. cyclameneae Hals, occurs on Cydamen. Scoleco-Allantosporae. Cylindrosp
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 488 FUNGI IMPERFECTI. Faded spots appear on the leaves, becoming later greyish brown dotted over with minute black points, the couidial patches.' C. ampelinum Cav. causes little dry spots on the leaves of vine, fre- quently in such numbers that the whole leaf dries up. C. kentjae Hals, attacks palm-seedlings so that their leaves do not unfold. C. cyclameneae Hals, occurs on Cydamen. Scoleco-Allantosporae. Cylindrosporium. The white and shining conidial cushions are embedded in the host- plants. The conidia are filamentous, frequently somewhat twisted. Cylindrosporium Tubeufianum Alles- cher. This attacks the living green fruit of the bird-cherry, and causes the forma- tion of brown spots from which pustules break out; the premature dropping of diseased fruits follows. In the locality where I observed this disease, numerous trees were attacked and most of the fruii, on each was badly diseased. The my- celium spreads through epicarp and mesocarp, but does not penetrate into the endocarp, so that the development of the embryo is not directly interfered with. The conidia originate in pycnidial cavities without any special peridium; their shape is given in the annexed diagnosis.^ The pycnidial cavities arise under the epidermis which is afterwards ruptured and with the cells underlying it becomes brown and dead. ' This note is taken from Underwood, Joxvnial of Mycology, vii., but no mention is made of it in the later paper by Webber and Swingle (" Diseases of Citrous Fruits in Florida," Dept. of Agriculture BnUetin, 8, 1896). (Edit.) '^ Alleacher gives the following diagnosis of this species: Piistvlis primum convexis, epicarpio tectis, dein applanatis scutiformibusve, epicarpio rupto cinctii, suhcirculwrihus, saepe caespitosix vel conflnentibus, luteo-brunneolis, snbfurfurace
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