I9IS.] DEVELOPMENT OF AGARICUS RODMANI. 339 



fubaeforinis, C. aurantiacus, Paniis stipticus, Pleurotus tremulus, 

 Oinphalia urnhellifera, 0. pyxidata, Marasmhis epiphyllus by Hoff- 

 niann^^ (i860) ; Collybia velutipes, C. fusipes, Hygrophorus chloro- 

 phamis, Galera niycenopsis, Hebeloma mesophaeus, Coprinus fimi- 

 tarius, Paxillus involiitus, Entoloma sericeum, and others by Hoff- 

 mann^* (1861) ; Mycena vulgaris, Collybia dryophila, Nyctalis para- 

 sitica, Clitocybe cyathiformis, and Cantharellus infundibulif ormis 

 by deBary*^ (1866, 1884, 1887) the latter two in conjunction with 

 Woronin; Coprinus lagopiis by Brefeld**' (1877, p. 127) ; Agaricus 

 campestris by Atkinson*' (1906) ; Hypholoma by Miss Allen*^ 

 (1906) and by Beer*^ (1911) ! Stropharia ambigua^° by Zeller 

 (1914) ; Agaricus arvensis and comtulus,^^ and Armillaria mellea^^ 

 by Atkinson (1914). 



Summary. 

 I. The lower limb of the double annulus of Agaricus rodmani 

 is not a true volva like that of the Amanitas thus far studied. It is 

 composed of a short segment of the blematogen plus some of the 

 inner tissue of the marginal veil. The greater portion of the blema- 

 togen remains " concrete " with or consolidated with the surface of 



*3 " Beitrage zur Entwickelungsgeschichte und Anatomic der Agaricinen," 

 Bot. Zeit., 18: 389-395; 397-404, pis. 13, 14, i860. 



** Hoffmann, H., " Icones Analyticse Fungorum; Abbildungen und Be- 

 screibungen von Pilzen mit besonderer Rucksicht auf iVnatomie und Ent- 

 wickelungsgeschichte, 1-105, pis. 1-24, 1861. 



*5 DeBar}^ A., " Morphologic und Physiologic dcr Pilze, Flcchten und 

 Mycetozoen," Leipzig, 1866. " Vcrgleichcnde Morphologic und Biologic der 

 Pilze, Mycetozoen und Bacterien," 1884. " Comparative Morphology and 

 Biology of the Fungi, Mycetezoa and Bacteria," Oxford, 1887. 



*6 Brefeld, O., Botanische Untersuchungen iiber Schimmelpilze," 3, 

 Basidiomyceten, I., L-IV., 1-226; pis. 6-1 1, 1887. 



^^ Atkinson, Geo. F., " The Development of Agaricus campestris," Bot. 

 Gaz., 42 : 241-264, pis. 7-12, 1906. 



*s Allen, Caroline L., "The Development of Some Species of Hypho- 

 loma," Ann. Myc, 4: 387-394, pis. 5-7, 1906. 



49 Beer, R., " Notes on the Development of the Carpophore in Some 

 Agaricacese," Ann. Bot., 25^: 683-689, pi. 52', 1911. 



50 Zeller, S. M., "The Development of Stropharia ambigua," Mycologia, 

 6: 139-145, pis. 124, 125, 1914. 



51 Atkinson, Geo. F., "The Development of Agaricus arvensis and A. 

 comtulus," Am. Jour. Bot., 1: 3-22, pis. i, 2, 1914. 



52 Atkinson, Geo. F., "The Development of Armillaria mellea," Myc. 

 Centralb., 4: 113-121, pis. i, 2, 1914. 



