CULTURE OF THE GRAPE. 219 



ble organization. Their roots fasten upon the leaf or 

 stalk of a plant ; while their stems grow and bud, and 

 mature seed, during their brief life, with as much system 

 as the California giant Sequoia of three thousand years' 

 growth. 



A correct knowledge of the nature of this parasite 

 will of course afford great assistance in checking its rav- 

 ages. 



Prof. B. Sillirnan, jun., in an article upon Mildew in "The 

 Horticulturist," vol. xviii. p. 305, remarks, "But little 

 study has been given by botanists to the investigation of 

 mildew. In fact, Dr. George Engleman is the only bota- 

 nist whose papers I have seen upon this subject. In 4 The 

 Transactions ' of the Academy of Science of St Louis, 

 vol. ii. 1863, Dr. Engleman, the president, describes two 

 species of fungi destructive to vineyards (p. 165). I add 

 an abstract of Dr. Engleman's short note on this subject, 

 for the information of your readers. Dr. Engleman de- 

 scribes first a species of Botrytis, probably the B. viticola 

 of Berkley. It makes its appearance in the latter pait 

 of June on the lower, downy surface of the leaves. . . . 

 About the same time, the mildew appears on the pedicles, 

 and often also on the young berries, when they are about 

 the size of peas, or smaller. Dr. Engleman never saw it on 



