Group 10. 



TYLOSTOMA EXASPERATUM (Plate 85 ) . Peridium fur- 

 nished with large, black, conical warts, which fall away leaving the 

 peridium scarred with circles of small warts which surround the large 

 ones.f Mouth raised, fibrillose. Stem with strong scales. Capillitium 

 slender (not exceeding diameter of spores), hyaline, rarely septate with 

 unswollen nodes. Spores 6-7 mic., very strongly aculeate, and (in some 

 species) faintly reticulate. 



This species is very different from all that precede in its strong, 

 warty peridium, its strong, spinulose spores and in its habitat. It grows 

 on branches and rotten wood (sometimes in the ground) and was 

 originally described from Cuba, but is probably widespread in the 

 tropics. We have seen specimens from Cuba, India and Brazil. It 

 has also been reported from Australia but we have seen no specimens 

 from Australia. Tylostoma Ridleyi ( Kew Bulletin, 99, 173) is a 

 synonym. 



SPECIMENS IN OCR COLLECTION. 



Brazil, Rev. J. Rick. 



(Tylostoma pusillum [Hook, Jour. 46, 157] is evidently a very similar plant 

 as to habitat and spores. The cortex warts are much smaller and the mouth 

 we were unable to make out from the type specimens. It was collected in the 

 Philippines.) 



TYLOSTOMA LEYEILLEAXUM (Plate 85). Peridium col- 

 ored, with a thin, adnate cortex, breaking up into little scale-like warts. 

 Mouth ( ?)4 Stem thick, strongly scaly. Capillitium stibhyaline. 

 with rare, unswollen septa. Spores 5-6 mic., strongly aculeate. This 

 plant was collected in Hawaii many years ago by Gaudichaud. and 

 was described and named by Leveille.ff The type specimens, dry and 

 in alcohol, are in the museum at Paris. There are some better speci- 

 mens collected in Hawaii by Drummond. at the British Museum. 



Sl'F.CIMENS IN Ol'R COLLECTION. 



Hawaii, part of the type collection by (iaudichaud, given us by P. Hariot. 



t This is exactly the same general nature of cortex as I.ycoperdon gemmatum. 

 though very different warts. 



t None of the specimens at Paris now show the mouth character, but in the 

 original drawing it is depicted as being simply an irregular aperture. 



In the original drawing the stem is shown much thicker than in the alcoholic 

 specimens from which our plate has been prepared. There are also some mounted 

 specimens at Paris with thicker stems. 



tt The claim has been made that the plant was named by (laudichaud which 

 does not seem possible to me. He was not a mycologist and would not have known 

 a Tylostoma from a Peziza. Besides his original drawing has today the sole name 

 "Fungus Isles Sandwich." 



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