 Although the puffball was originally described as new to science by Elizabeth Eaton Morse in 1935 , it was not published validly until 60 years later . The species is named for its resemblance to Calvatia sculpta , from which it can be usually distinguished in the field by its less prominent pyramidal warts , and microscopically by the antler @-@ like branches of its capillitium ( thread @-@ like material among the spores ) . Calbovista subsculpta is a good edible species while its interior flesh ( the gleba ) is still firm and white . As the puffball matures , its insides become dark brown and powdery from mature spores . 
