TUB BRACED. 



285 



377. — Order Tuberaceae. In this order the sporocarp is 

 a rounded underground mass, composed of pseudo-paren- 

 chyma and the asoi with their contained 

 ascospores. In the Truffle {Tuber) the 

 sporocarp is large, and dark colored and 

 warty on the exterior. Internally it con- 

 tains narrow tortuous chambers, on whose 

 walls are the asci, containing two to eight 

 usually areolate or echinulate ascospores 

 (Kg. 192, ^ and B). The sexual organs, 

 as well as the early stages of the Truffles, 

 are unknown. 



378. — The common Wue mould, found 

 on all sorts of decaying bodies, and known 

 as Penicillium glauciotn (or P- crusta- 

 ceum), has recently been found by Brefeld 

 to be a member of this order. Its life-his- 

 tory is now pretty well known, and it in- 

 dicates what the early 

 stage of the Truffle 

 must in all probability „. , „ , 



/ •' Fig. 192.~Tul>er me- 



turn out to be. In lanospomm. A, a por- 



_-, . .77 • 11 tion of a transverse sec- 



I^emC'lUlum tne my- tinn, showing the asci, 



T -1 1 with contained asco- 



Celium sends up a large spores; S, an ascus 



number of Tertical i;:^th nS?ch n?lgaifleT- 



hyphffi, which branch After Tnlasne. 



at the top, and produce chains of conidia 

 (Kg. 193). It appears, from Bref eld's 

 researches, that this stage is the only 

 one which the plant passes through 

 under ordinary circumstances ; by care- 

 ful culture, howcTer, he succeeded in 



Fig. 193. — PeniHUium 



stage. 



^SSrin|"h7phf;'=ai making it pass into its sexual 

 fated rfiainrf^cOTidla" ^^ found the scxual Organs to be in all 

 Magnified.— After Cooke, essentials similar to those of Eurotium 

 (Fig. 191) ; like it, the carpogonium is a spirally twisted end 

 of a hypha, and the antheridium a branch growing out from 

 below it. The subsequent development is also much as in 

 Eurotium ; a thick covering forms over the fertilized carp- 



