100 Bulletin 313 



Glceosporium fusarioides E. & K. (^ GlomereUa fusarioides 

 Edgerton, page 58). — On leaves and stems of Asclepias comuti. 

 Causes numerous small spots. Acervuli numerous and variable. 

 Spore masses on both surfaces of leaf but most abundant above. 

 Spores hyaline, irregular, but mostly oblong and cylindrical, 18-27 x 

 4.5-6 fji. 



600. Infected leaf of Asclepias sp. 601. Spores, 1/12. 



Glceosporium musarum Cke. & Mass. — On the ripe fruit of the 

 banana. Common on the markets. Causes spotting and rotting of 

 the fruit. Acervuli grouped, erumpent, salmon-colored; conidia 

 elongate-ellipsoid at both ends, non-septate, hyaline, 10-12 x 4 /a. 



602. Spores, 1/12. 



Glceosporium nervisequum (Fcl.) Sacc. (:= Gnomonia veneta 

 (Sacc. & Speg.) Kelb., page 58). — On the leaves and twigs of the 

 sycamore. Causes a blighting of the leaves and young shoots. Acer- 

 vuli mostly on the upper surface of the leaf, near the nerves, com- 

 pact, orbicular or nearly so, erumpent, black, 100-200 ^; conidia 

 oozing out in creamy white mass, ellipsoidal, 10-14 x 4-6 /x. 



603. Infected leaf of Platanus occideniahis. 604. Acenuli on same, 2/3- 

 605. Cross-section of same, 2/^. 606. Spores, 1/12. 607. Infected twig from 

 same host showing spores tendrils, 2/3. 608. Cross-section through acervulus 

 on twig, 2/3. 609. Spores, 1/12. 610. Conidia from leaf, 1/12. 611. Spores 

 from oak leaf, 1/12. 



Glceosporium piperatum E. & E. (= GlomereUa piperafa (E. & 

 E.) S. & S., page 58). — Causes a soft rot, sunken areas on the fruit 

 of the pepper. Acervuli pustular, concentrically grouped; conidia, 

 12-23 X 5-6 fjL. 



612. Acervuli, 2/3. 613. Conidiophores and immature cov.idia. 614. Spores, 

 1/12. 



Glceosporium polymorphum Tunchili (= GlomereUa cincta (B, 

 & C.) S. & S., page 58). — On the leaves of Dracaena species in 

 greenhouses. Cause leaf spots, killing the greater part of the tip. 

 Diseased parts brown, becoming ashy-colored, sometimes white, 

 margin chestnut-colored. Acervuli densely grouped, convex, sub- 

 rotund, covered by epidermis but becoming erumpent, black, 122-208 

 X 98-149 fx ; spore tendrils orange-colored ; conidia cylindrical or ob- 

 long, ends rounded, straight or very slightly curved, 1 to 3 or more 

 guttulate, granular, hyaline, 14-23.3 x 4-6.6 ju,. 



615- Infected tip of leaf of Dracaena fragrans showing acervuli. 616. Acer- 

 vuli and spores tendrils, 2/3. 017. Spores, 1/12. 



