Bean Anthracnose 115 



York Botanical Garden, show the presence of the fructifications of two 

 fungi on one of the two pieces of pods in the packet. One of these, occurring 

 in characteristic young anthracnose spots, has the typical spores of 

 Colletotrichum lindemuthianum except that the average width, 5.75 /x, 

 is a trifle greater. There can be no doubt that it is the bean anthracnose 

 fungus. The other fungus appears on the specimen as numerous small 

 black pycnidia and these contain typical Septoria spores. The other 

 specimen shows only the Septoria-like fungus. Desmaziere's description 

 of the fungus given in Annates des Sciences Naturelles (1843 a), and also 

 accompanying the specimen, is of the Septoria, but his description of the 

 disease applies, at least in part, to the condition produced by the Colleto- 

 trichum. This probably led to the mistake of ascribing to Septoria 

 leguminum Desm. the anthracnose present on pods of Phaseolus vidgaris 

 distributed by Von Thiimen (1882) as S. leguminum and by Roumeguere 

 (1884) as S. leguminum Desm. var. Phaseolarum. Saccardo (1896) 

 describes a fungus, which he names Gloeosporium socium Sacc, as occurring 

 on the leaves of living bean plants (Phaseolus vulgaris). But from his 

 description it seems improbable that he has the bean anthracnose fungus. 

 D. Saccardo (1904) labeled as Colletotrichum lindemuthianum (Sacc. et 

 Magn.) Cavara f. brachysporum specimens of a fungus on bean pod, 

 Phaseolus vulgaris, the conidia and basidia of which were recorded as 

 considerably shorter than the normal average. An examination of type 

 specimens in the herbarium of the New York Botanical Garden shows 

 small but typical anthracnose spots, from which, however, no spores were 

 obtained. 



Heald and Wolf (1911) have ascribed to a new species, Colletotrichum 

 caulicolum, a destructive canker which they found on the stem of Kentucky 

 Wonder beans in Texas. They say that this fungus differs from C. linde- 

 muthianum in that the setae are produced abundantly in the host and that 

 the spores are larger and are falcate. Their description of the disease 

 and of the fungus is similar in most respects to that of bean anthracnose 

 and its pathogene, but it is not possible from the description to decide 

 that the fungi are the same. Cooke and Harkness (1880) report Gloeo- 

 sporium leguminis C. & HK. on legumes in California, and later (1884) 

 on pods of Robinia at Sacramento, California. Cooke (1880) describes 

 Discella leguminum Cooke on the pods of Prosopis found in Texas. Comes 

 (1891) lists Discella leguminum Cooke and Gloeosporium leguminis C. & 



