FusAKiA OF Potatoes 



267 



3. Ramularia Solani n. sp. (Figs. 1a and 51) 



Conidia from nearly cylindrical to slightly curved, with both ends 

 rounded or with basal cell slightly papillate, mostly 1- and 2-septate; 

 1-septate measuring 29.5x6.5 (28-30 x 6.2-6. 7) /x, and 2-septate meas- 

 uring 32x6.4 (26-33.7 X 6.3-6.8)At; plectenchyma flat, usually chocolate 

 brown; aerial mycelium from 2 to 4 milhmeters high, from medium dense 

 to medium loose, from chamois to deep olive-buff, on potato agar rich in 

 glucose, often with a chocolate-drab tinge; substratum, on the same 

 medium, in zones of from sepia to tawny olive, and in old cultures to 

 Saccardo's amber; conidia in mass from nearly white to deep olive-buff; 

 no chlamydospores observed. 



Hab. On rotted tubers of Solanum tuberosum, New York. 



Fig. 51. — Ramularia Solani. a, Sporodochial conidia from 12-days-old culture on oats; 

 B and c, conidiophores from 34-days-old culture on hard lima-bean agar; d, conidia from aerial 

 mycelium from 25-days-old culture on slightly acidified hard potato agar; e, conidia from aerial 

 mycelium from 34-days-old culture on hard lima-bean agar; f, sporodochial conidia from 8- 

 days-old culture on hard lima-bean agar; g, sporodochial conidia from 55-days-old red rasp- 

 berry cane phig; h, sporodochial conidia from 67-days-old flask culture on hard potato agar 

 with 2 per cent glucose 



Latin description. — Conidiis ferme cylindricis vel parum curvatis, 

 utrisque finibus rotundatis vel cella infima parum papillata, plerumque 

 1-2-septatis; conidiis 1-septatis, 29.5x6.5 (28-30 x 6.2-6.7) yu, vel 2-sep- 

 tatis, 32x6.4 (26-33.7 x 6.3-6.8) /x; plectenchymate piano, plerumque 

 "chocolate brown" (R); aerio mycelio 2-4 mm. alt., e mediocriter denso 

 mediocriter laxo, e "chamois" (R) "olive-buff" (R), saepe in agare So- 

 lani tuberosi perglucoso "chocolate-drab" (R) tincto; substrato, eodem in 

 agare, e "sepia" (R) "tawny ohve " (R) in zonis, vel in culturis maturis 



