 In her 1935 Mycologia article , American mycologist Elizabeth Eaton Morse noted the existence of an abundant and widely distributed puffball of the western United States that was commonly misidentified as Calvatia sculpta , although it differed from that species in having extensively branched capillitial threads . The puffball had characteristics that aligned it with several other taxa . The peridium was similar to those of Calvatia sculpta , Calvatia <unk> ( now known as Calvatia <unk> ) , Scleroderma <unk> , and Scleroderma <unk> ( now Scleroderma citrinum ) ; the rooting base was similar to Bovistella ; and the structure of the capillitial threads reminiscent of Bovista , Bovistella , and Mycenastrum . However , the new species had a unique combination of characteristics and did not fit neatly into any already @-@ described genera . As a result , Morse circumscribed the new genus Calbovista to contain Calbovista sculpta . The type collection was made at Soda Springs , California in May 1934 at an elevation of 6 @,@ 767 ft ( 2 @,@ 063 m ) . Morse 's publication of the genus was invalid because it lacked a description in Latin — a requirement of the International Code of Botanical Nomenclature that was implemented effective January 1 , 1935 . The genus and species were published validly with a Latin description by Michelle Seidl in 1995 . 
