Nov. 1906] Index to North American Mycology 
251 
Gymnolomia multiflora, host to Puccinia aemulans Syd. n. sp. 
Ann. Mycolog. 4:31. Feb. 1906. 
HAiRY-Root Disease, see Crozm-Gall and 
Halsted, Bryon D., Owen, Earle J., and Shaw, Jacob K. Fungi 
as related to Weather and Fungi up Experiment Grounds 
[in Report of Botanical Department. Extracts from 
“Weather and Crop Bulletin” and notes on the occurrences 
of a few parasitic fungi.] Rep. N. J. Agr. Coll. Exp. Sta. 
^1905:510-517. 1906. 
Hamaker, J. I. A Culture for the Zygospores of Mucor stolo- 
nifer. Science, N. S. 23 1710. 4 May 1906. 
Haplosporella conmixta Peck, n. sp., bark of dead branches of 
slippery elm, Ulmus fulva, Bull. Torr. Bot. Club, 331219. 
Apr. 1906. 
Haplosporella missouriensis Bubak n. sp., auf toten Aestchen 
von Persica vulgaris. Jour. Mycol. 12:54. Mar. 1906. 
Harknessia aggregata Syd. n. sp., in foliis languidis Ceanothi 
velutini. Ann. Mycolog. 4 : 344 . Aug. 1906. 
Harper, R. A. Sexual Reproduction and the Organization of the 
Nucleus in Certain Mildews. Carnegie Institution of Wash¬ 
ington Publication No. 37:1-104. PI. I-VII. September 
1905. 
Hasselbring, Heinrich. The Appressoria of the Anthracnoses. 
Bot. Gaz. 43:135-142. August 1906. 
Hedgcock, George Grant. A Disease of Cauliflower and Cab¬ 
bage caused by Sclerotinia. An. Rep. Mo. Bot. Gar. 16:149- 
151. pi. 32-4. 1905. 
Hedgcock, George Grant. A Disease of Cultivated Agaves due 
to Colletotrichum. An. Rep. Mo. Bot. Gar. 16:153-6. PI. 
35-7- I905- 
Hedgcock, Geo. G. The Crown-Gall and Hairy-Root Diseases of 
the Apple Tree. U. S. Dept. Agr. Bureau PI. Industry, 
Bull. 90:1-7. PI. I-III. 17 Nov. 1905. 
Helicoon fairmani Sacc. n. sp., ad ligna putrescentia dejecta, 
socio Bactridio minuto. Ann. Mycolog. 4:278. 5 June 1906. 
Heliomyces nigripes Morgan [Agaricus nigripes Schw., Maras- 
imus nigripes Fr.] A. P. Morgan. Jour. Mycol. 12:93. May 
1906. 
Heliomyces, North American species of. [Monograph.] A. P. 
Morgan. Jour. Mycol. 12:89"92. May 1906. 
Heliomyces vialis Morgan [Marasmius vialis Peck.] A. P. 
Morgan. Jour. Mycol. 12:94. May 1906. 
