116 Bulletin 313 



OiDiUM FRAGARi^ Harz. (= S phcEYOtheca humuU (D. E.) Burr, 

 page 32). 



OiDiUM LEUCOCONiUM Desni. (= SphcETOtheca pannosa (Wallr.) 

 Lev., page 32). 



OiDiUM AMBROSIA Thiim. (:= Erysiphe cichoracearum D. C, 

 page 26). 



OiDiuM MONiLioiDES Link (= Erysiphe graminis D. C, page 26). 



OiDiUM TUCKERi Berk. (= Uncinula necator (Schw.) Burr., page 

 32). 



OiDiuM CRAT^Gi Grogn. (=r Podosphcera oxyacanthae (D, C.) 

 DeBary, page 30) . 



SPOROTRiCHUi\r POyE Peek. — On carnations. Causes a rotting of 

 the buds. Hyph^e hyaline, creeping cottony, branched, septate, 

 2.5-6 jx in diameter; micro-conidia elongate-elHptic to ovate-elHptic, 

 usually, 1 -septate, occasionally more, 3 or 4 times as large as the mi- 

 cro-conidia. This organism is carried from plant to plant by a mite 

 (Pediculoidus dianthophilus) . 



708. Mycelium and spores, 1/12. 



BoTRYTis PARASITICA Cav. — On tulip buds. Causes a rot. Hyphje 

 ashy-coloredy sparse, erect, branching, inflated at base ; conidia large, 

 usually ovate, but more or less irregular, pedicillate, heads umbellate, 

 hyaline to slightly ashy, 16-20 x 12-13 /<,. 



709. Conidiophores and conidia from tulip, 2/3. 710. Conidia, 1/12. 



BoTRYTis VULGARIS* Fr. — On cultivated Primula. Causes a dying 

 of the leaves. Hyphse, slender, septate, branched, erect, ashy or 

 olive-gray; conidia globose, smooth, hyaline or pale, 10-1 x 7-9 m. 



711. Infected leaf of Primula sp. 712. Conidiophores and conidia from 

 same, 2/3. 713- Conidia, 1/12. 714. Conidiophores and conidia from rose, 2/'3. 



715. Swollen tip of branchlet of conidiophore showing conidia attached, 1/6. 



716. Conidia from lettuce, 1/12. 717. Conidiophores from lettuce, 2/3. 718. 

 Spores, 1/12. 



Cephalothecium roseum Cda. — On scab spots on fruit of the 

 apple and also on many other hosts. Causes the so-called "pink rot." 

 Spots whitish or pinkish ; conidiophores erect, unbranched, non-sep- 

 tate, hyaline ; conidia oblong-ovate, 2-celled and constructed at the 

 septum. 



719. Conidiophores and conidia, 1/6. 720. Conidiophores and conidia, 1/12. 



*Svn. B. cinerea Pcrs. 



