INDEX TO VOLUME XIII* 



New names and the final members of new combinations are in bold face type 



Abies, 92; lasiocarpa, 103 

 Abronia, 21 



Acer, 140, 154, 157; campestre, 153; 



rubrum, 165 

 Acetabula, 218; ancilis, 69 

 Acetabularia, 217 

 Achras Zapota, 62 

 Achyla, 126, 336 

 Acrospermum, 64 ; Maxoni, 64 

 Actinomyces, 338 



Adams, J. F., Observations on the in- 

 fection of Crataegus by Gymno- 

 sporangium, 45 



Aecidium, 234, 276; Allenii, 108; 

 Aquilegiae, 233 ; Ceanothi, 233 ; 

 Clematidis, 233; Fendleri, 317, 318, 

 319; hydnoideum, 234; Impatientis, 

 233 ; Jamesianum, 233 ; macro- 

 sporum, 233 ; magnatum, 233 ; mo- 

 no icum, 233 ; Pammelii, 233 ; Phry- 

 mae, 233 ; pustulata, 233 ; roesteli- 

 oides, 102; Sambuci, 233; Silphii, 

 233 ; Smilacis, 234 



Aethalium, 329, 330, 331, 332 



Agaricus campester, 119, 275 



Agave, 284 



Agropyron, 19, 316, 317, 322; Smithii, 

 316, 317; spicatum, 104; tenerum, 

 104, 109, 316, 317 



Agrostis palustris, 11 1 



Aleuria ancilis, 69 ; apiculata, 70 ; 

 macropus, 229 



Aleurodiscus, 199, 267, 273 ; macro- 

 dens, 190 



Alnus rhombifolia, 97 



Alternaria Nelumbii, 273, 340 ; Solani, 

 126 



Amanita, 63, 115; cothurnata, 271; 

 muscaria, 271 ; pantherina, 270, 

 271 ; pantherinoides, 271 ; velu- 

 tipes, 271 



Amelanchier, 235 ; Jonesiana, 103, 



107; mormonica, 102; oreophila, 



108; polycarpa, 103; prunifolia, 



107 ; utahensis, 107 

 Ampelopsis, 165 ; quinquefolia, 165 

 Amylirosa,' 354 

 Anchusa officinalis, 236, 246 

 Anderson, P. J., and Ickis, M. G., 



Massachusetts species of Helvella, 



201 



Andropogon leucostachys, 289 

 Anemone, 19 



Anthostomella Rhizomorphae, 115 



Antirrhinum majus, 109 



Apium graveolens, 191, 199, 269, 270 



Aquilegia, 19 



Arabis, 22 



Arctostaphylos, 306 



Arcyria, 333 



Aristida portoricensis, 288, 299 



Armillaria mellea, 58, 64 



Arthur, J. C., Memoranda and index 

 of cultures of Uredineae, 1899- 

 1917, 230; Nineteen years of cul- 

 ture work, 12 



Aschersonia, 298 



Ascochyta, 348; Theae, 326 



Ascomycetes, Review of Klebahn on 

 life histories of, 346 



Aspergillus flavus, 277 ; niger, 274 ; 

 Oryzae, 277 



Asprella Hystrix, 320 



Aster, 16 ; arenarioides, 235 



Asterina, 282 



Asteroma, 349 



Astragalus, 105 ; humistratus, 105 ; 



Sonorae, 106 

 Atriplex hastata, 16; rosea, 105; 



spatiosa, 105 

 Auerswaldia, 290 ; Miconiae, 289, 290 

 Azalea, 64 



Baccharis, 306 



* It has been considered unnecessary to include here the species listed in 

 the four following articles, since they are already indexed or specially listed. 

 Arthur: Memoranda and index of cultures of Uredineae, 1899-1917. See 



P- 237. 



Diehl : The fungi of the Wilkes expedition. See p. 40. 

 Overholts : Some New Hampshire fungi. See p. 26. 



Zundel : Smuts and rusts of northern Utah and southern Idaho. See 

 p. 179. 



356 



