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Senecio salignus DC, host to Aecidium herrerianum Arth. n. 

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Sex, Differentiation of, in Thallus Gametophyte and Sporophyte. 

 Albert Francis Blakeslee. Bot. Gaz. 42 :i6i-i78. September 

 1906. 



Sexuality in the Mucors. [x\bstract.] A. F. Blakeslee. 

 Science N. S. 25 -.2%^. 22 Feb. 1907. 



Sexual Reproduction in the Slime Moulds, Evidences of. 

 [Abstract.] Edgar W. Olive. Science N. S. 25:262. 15 

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Sheldon, John L. A Study of the Leaf-tip Blig-ht of Dracaena 

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 1907. 



Sheldon, John L. A Rare Uromyces [on Sisyrinchium 

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Slime Moulds, Evidences of Sexual Reproduction in the. 

 [Abstract.] Edgar W. Olive. Science N. S. 25:262. 15 

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Smith, Clayton O. Bacterial disease of Oleander, Bacillus oleae 

 (Arcang.) Trev. Bot. Gaz. 42:301-309. 



Smith, EHzabeth H., see Smith, Ralph E. and . . . 



Smith, Ralph E., and Smith, Elizabeth H. A New Fungus of 

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SoRBUS occidentalis (Wats.) Greene, host to Aecidium sorbi 

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Spegazzinia ornata Sacc. Spore forms of. [Abstract.] Ernst 

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Sphaeroderma texanicum Rehm n. sp., ad lignum betulinum. 

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Spireciiina Arthur gen. nov. [Uredinales.] Joun Mycol. 

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Spireciiina loeseneriana (P. Henn.) Arth. n. n. [Uredo 

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Spore forms of Spegazzinia ornata Sacc. [Abstract] Ernst 

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Sporotrichum anthophilum Peck n. sp.. parasitic in the filaments 

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