348 FETCH : 



Order II. — Didymiacb^. 



Didymium dififorme, Duby. 



Rare. A few sporangia have been found at Hakgala (5,600 

 feet) on moss, dead leaves, and grass, on two occasions, and at 

 Peradeniya, also on two occasions. The total number of 

 sporangia seen does not exceed one hundred, and of these only 

 six have been found at Peradeniya. 



Didymium clavus, Post. 



Didymium commutahile, B. & Br., Fungi of Ceylon, No. 746. 

 Didymium clavus, A. & S., in Berkelej' and Broome, Fimgi of 

 Ceylon, No. 745. Didymium radiatum, Mass., Mon., p. 229 

 (in part). 



Berkeley and Broome's type specimen of D. commutahile in 

 Herb. Peradeniya is Didymium clavus witli stalks about 1 '25 

 mm. high, furrowed, twisted, white or gray, encrusted with 

 lime deposits ; the sporangia are 0'8 mm. diameter, flattened, 

 grayish-white ; spores 6 /u diameter. This is a fairly common 

 species in Ceylon. In some forms the head is not so much 

 flattened as in the usual European examples ; in others the 

 stalk tapers abruptly near the apex and the head is nodding. 



Peradeniya. 



Didyirium nigripes, Fries. 



Didymium microcarpon , Fr. , var. xanthopus, Ditm. , in Berke- 

 ley and Broome, Fimgi of Ceylon. ''Didymium farinaceum, 

 Schrad.," in Berkeley and Broome, Fungi of Ceylon, No. 748. 



Berkeley and Broome's specimens of D. farinaceum in Herb. 

 Peradeniya are D. nigripes. The specimens named D. 

 nigripes in B. & Br. 749 (Thwaites' 573) are Lamproderma 

 a,Tcyrionema. , Rest. This species is exceedingly common. In 

 several gatherings the minute warts on the spore tend to be 

 arranged in clusters. In one gathering, on fallen palm nuts, 

 the sporangia are either stalked, sometimes connate, or sessile ; 

 the sporangium wall is yellow at the base ; the columella is 

 white with a yellow tinge in the stalked specimens , or white 

 and thin in the sessile forms ; stalk furrowed, clear yellow- 

 ohve in the upper part, but dark and enclosing refuse at the 

 base ; spores, 8 /* diameter, violet-brown, minutely wai-ted, 

 with some warts arranged in clusters, about three clusters 



