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Articles botaniques : . 



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The 



Trelease (William) r Phoradendron. — Campbell (D.-H.) : 

 morphology and relationships .of Porfomi7rju?n malaccense (Steph.) 

 Cbamberlain (Ch.-J.) : A phylogenetic study of Cycads. — Crocker (W.) 

 and Groves (J.-F.) : A method of prophesying the life duration of 



Variation of 





seeds, .rr-.: Goodspeed (T.-H.) and Clausen (R.-E.) 



flower size in N^cotiana. 



parthenogeneses in Nicot 



investigations. — Lipman (Ch.-B.) : The nitrogen problem in arid soils. 



■ :> 



Goodspeed (T.-H.) f Parthenocarpy and 



Babcogk (E.-B.) : Walnut mutant 



11,1916. . . 



^ Campbell (D.-H.) : The archegonium and sporophyte of Treubia 

 insignis Goebel. — Rose (J.-N.) : Recent explorations in the Cactus 



deserts oL South America. — Osterhout (W.-J.-Y.) : The nature of 

 mechanical stimulation. — Farlow (W.-G.) : Tlie marine Algae of the 

 Pacific. 



Campbell (D.-H.) : Some problems of the Pacific Floras. 



Haas (S.-C.) : The excretion of acids by roots — Harris (J.-A.) : The 

 Vriesian Mutation of the Garden Bean, Phaseolus vulgaris — Brooks 



(S.-G.) : New determinations of permeability. 



(W 



Oaks of America. — Bowman (H.-H,-M.) : Physiological studies of 

 ^hizophora. ^ > '> 



iii;i9i7. 



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MitlER 



Rosenbaum (J.) : Studies of the genus. i*Ay/o/^|A/i^ora. 

 (E.-C.)Y Daily variations of water and dry matted in theJeaves oif Corn 

 and the Sorghums. — Campbell (D.-H.): Growth of isolated sporo- 

 Phytes of Anthoceros. 



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