White : Tylostomaceae of North America 437 



this genus. The volva is of such a friable nature that it would be 



j=> 



preserved with difficulty even if the stem had not been detached 

 by the inattentive collector. Quite recently several specimens 

 have been found at Mesilla Park, New Mexico, which belong here. 

 In going over the material referred to Tylostoma, in the Ellis 

 collection, two other specimens, from different localities in New 

 Mexico, were found which though destitute of volva, evidently be- 

 long to the genus Chlamydopns though they may constitute another 

 species. For the present they have been placed with C. clavatus. 



I. Chlamydopus clavatus Speg. loc. cit. 



Peridium depressed globose, 1.5-2 cm. high, 2.2-3.5 cm. in 

 diameter, smooth, leathery, lightish fawn- colored : mouth plane, 

 lacerate, irregular: stem 8-15 cm. long, much enlarged at the top 

 where it joins the peridium, 1.5-3 cm - m diameter at the top, 

 0.5-1.5 cm. at the base, sulcate, lacerate scaly, firm, solid, of the 

 same color within and without as the peridium : volva friable, cup- 

 like, with flaring sides, 1.5-2.5 cm. high, having remnants of earth 

 and sand adhering to it: capillitium very abundant, interlaced, 

 lightish yellow, hyaline, branched, sparingly septate, not swollen 

 at the joints, the free ends usually rounded, 5-7 ft wide : spores 

 subglobose, dark ferruginous, densely verrucose, 4-6 fi in 

 diameter. (PI. 35, f. 1-6.) 



New Mexico : Mesilla Park, Cockerel!, Mesa, Garcia, Las Cru- 

 ces, Wooton. Sandy soil under mesquite. 



Aside from its technical characters this species presents a 

 habit very unlike any species of Tylostoma found in this country. 

 Its clean smoothish peridium and stem are quite in contrast with 

 the usual condition found in the species of Tylostoma, where the 

 rough outer peridium, and usually the stem also, is frequently 

 covered with fragments of adherine soil. Also in the specimens 



& W.V,..^ ~. ~V— X & 



of this genus, the capillitium threads are not as distinct as those of 

 Tylostoma and have considerable white amorphous hyaline tissue 

 intermingled with them. 

 HI. BATTARREA Persoon,* Syn. Meth. Fung. 129. pi. J./. 



1-3. 1 80 1 



It has been impossible to trace the history of Battarrea to it 

 very beginning as the Acta Anglica, in which W oodward makes 



*This genus was named for Antonio Battarra, an early Italian mycologist, ami 

 was first erroneously spelled Batarrea by Persoon. In 1804 the name was changed by 

 Palisot de Beauvais to Battarea, but the correct spelling, Battarrea, was not adopted 

 until 1825 by Fries. 



