432 FUNGUS-FLOE A.. 



Maerosporium cladosporioides, Desm., Plant. Crypt., 1857, 

 p. 3, and xxiv. p. 3 ; Saco., Syll., iv. n. 2501. 



On fading leaves of beet, onion, lettuce, &c. 



The conidia are not vertically or murali-divided, hence 

 the present species differs from the typical condition of 

 Maerosporium. 



' Maerosporium heteronemum. Sacc. 



Spots scattered, reddish-white, irregular, often confluent, 

 on both surfaces of the leaf; hyphae erect, septate, of two 

 forms, crowded into minute, distinct bundles ; the conidio- 

 phores short, nodulose, 50 X 5 /a, brown; sterile hyphae 

 simple, elongated, rather flexuous, whitish, obtuse above, 

 attenuated towards the base, 150-200 fj, long ; conidia large, 

 pedicellate, oblong-clavate, brown, divided into cells by 3-7 

 septa,'50-60 /j. long, pedicel hyaline. 



Maerosporium heteronemum, Sacc, Syll., iv. n. 2502. 



Septonema heteronema, Desmaz., xxii. Not. p. 4. 



On dead or fading leaves of Sagittaria sagittifolia. 



Maerosporium brassicae. Berk. 



Forming small pustules; hyphae fasciculate, simple, rather 

 flexuous, septate, slightly constricted at the septa, brown, 

 pale towards the apex, 50-70 fx. long; conidia solitary and 

 terminal on the conidiophores, clavate, 6-10-septate trans- 

 versely, afterwards vertically septate, brownish, 60-70 X 

 10-16 /*. 



Maerosporium brassicae, Berk., Engl. Plor., vol. v. p. 339 ; 

 Sacc. Syll., iv. n. 2506. 



On decaying stems, leaves, fruits, &o., of cabbage. 



Maerosporium nobile. Vize. (fig. 25, p. 397.) 

 Hyphae fasciculate, short, erect, septate, brown, simple, 

 in minute tufts; conidia rather large, subpiriform, or 

 irregular, 4-lOseptate, unequally divided by 2-6 vertical 

 septa, brown, constricted at the septa, 60-80 x 40 /a. 



Maerosporium nobile, Vize, in Grevillea, also in Cooke's 

 ' Black Moulds,' pi. 26, f, 20 ; Sacc, Syll., iv. n. 2625. 

 On dead stems and leaves of Bianthus. 



Maerosporium eoneinnum. B. & Br. 

 Spots velvety, black ; hyphae flexuous, septate, minute, 

 brown, pellucid above and sometimes with a small lateral 



