72 Bulletin 313 



Phoma polygramma (Fr.) Sacc. var. plantagims Sacc. — On the 

 flowering shoot just below the inflorescence of Plantago lance olata. 

 Causes a drooping and death of the diseased parts, which frequently 

 fall away. No stroma present. Pycnidia minute, numerous, glo- 

 bose, depressed, smooth, light brown. Spores numerous, oozing in 

 whitish tendrils, ovate or irregular, hyaline, 6-9 x 2-3 fx. 



391. Infected inflorescence of Plantago lanceolata. 392. P\-cnidiiun, 2/3. 

 •3'93. Cross-section of same, 2/3. 394. Spores, 1/12. 



Phoma subcircinata E. & E. — On the pods of the lima bean. 

 Causes brownish or black spots. Described in Proc. Phil. Acad. 

 Sci. (1893), p. 158, as follows: "Pycnidia subcuticular, 70-90 ix 

 diameter, sublenticular, subconfluent, ostiolate, membranaceous, 

 black, subcircinately arranged in large (1 cm.) circular, faintly 

 zonate spots, finally spreading and occupying the entire surface of 

 the pods. Spores oblong-elliptical, hyaline, 2 guttulate, 5-6 x 2-2.5 /x, 

 on simple basidia rather longer than the spores." 



We have also found a Phyllosticta on the leaves always associ- 

 ated with the P. subcirinata of the pods. They are probably the 

 same organism. 



395. Infected bean pod. 396. Pycnidium, 2/3. 397. Spores, 1/12. 



Phoma thapsi E. & E. — On the living stems of Verhascuni tliap- 

 sus. Causes elongated, conspicuous, brown spots. Pycnidia papilli- 

 f orm, ostiolate and piercing the blackened epidermis ; spores oblong- 

 elliptical, ends obtuse, 2-guttulate, 5-6 x 2.5 /i,. 



Note:- — Spore measurements almost the same as Phyllosticta 

 verhasicola but the pycnidia are shaped differently and the spore? 

 are larger and 2-guttulate. 



398. Infected stem of Verhascum thapsus. 399. Spores, 1/12 



Phoma uvicola V. C. (= Guignardia bidwellii (E.) V. & R., 

 page 44). 



Sph^ronema fimbriatum (E. & H.) Sacc. — On the roots and 

 stems of the sweet potato. Causes rots of both. Pycnidia black, 

 base globose, 96-224 fi in diameter and embedded in the tissues of 

 the host, beak very long projecting from host, 395-608 /a long, 24-34 

 IX at base, 14-20 /x at apex, the tips tapering and on maturity break- 

 ing into long, slender, hyaline fimbriations ; pycnidia spores, globose 

 or somewhat angular, hyaline, 5-9 /x. Mycelium 2-6 fx in diameter, 

 frequently septate, giving rise to specialized hyphae or conidiophores 

 bearing two t)^pes of conidophores ; the one olive-brown, thick- 

 walled, globose to pear-shaped, 12-19 x 6-13 /x, formed by constric- 



