460 FUNGUS-FLORA. 



Stysanus parasiticus, Desm., Ann. Sci. Nat., ser. iii. v. x. 

 p. 344. 



On fading or rotten leaves of various plants. 



Sect. 2. Pliragmosporae. Sacc. 

 AKTHEOBOTEYUM. Cesati. (fig. 4, p. 442.) 



Conidiophore capitate, on an elongated coloured, rigid 

 stem composed of agglutinated, parallel, septate hyphae, 

 that spread out at the apex and become more or less free, 

 bearing the septate, coloured conidia at their tips. 



Arthrobotryum, Cesati in Hedw., i. t. iv. f. 1 ; Sacc., Syll., 

 iv. p. 608. 



Usually gregarious, the hyphae forming the compact, 

 rigid, dark-coloured stem becoming free at the tip and 

 forming a head, the tips of the hyphae bearing the conidia. 



Arthrobotryum stilboideum. Cesati. 



Gregarious, blackish brown, stem tapering upwards, 

 blackish, conidia cylindrical, 3-septate, endochrome becoming 

 pale brown, 10-12 x 4 p.. 



Arthrobotryum stilboideum, Cesati, Hedwigia, i. t. iv. f. 1 ; 

 Sacc., Syll., iv. n. 2986. 



On rotten wood. Whole plant not 1 mm. in height. 



Arthrobotryum atrum. B. & Br. (fig. 4, p. 442.) 

 Gregarious, blackish, stem stout, cylindrical, rigid ; head 



large, subglobose ; conidia cylindric-ovoid, 3-4 septate, the 



two end cells pale, remainder brown, 30-40 x 12-16 p. 

 Arthrobotryum atrum, B. & Br., Ann. Nat. Hist., n. 822, 



t. ix. f. 6 ; Sacc., Syll., iv. n. 2987. 



On dead stems of various herbaceous plants, and on 



branches. 



Fam. IV. TUBEECULAEIEAE. Ehrenb. 



Compact ; usually originating from a more or less de- 

 veloped basal stroma ; wart-like, globose, discoid ; super- 



