496 



Bulletin 315 



Colonies spreading, at first hyaline, becoming black with age, zonate 



in the center, margin entire; mycelium hyaline, septate, 5-6/z, with branches 



'^c^ almost at right angles, with oval, ellipsoidal, or globose 



chlamydospores up to 12/x in diameter; articulate with age; 



conidiophores fuliginous near the apex, almost hyaline at 



the base, branched, septate, 65-7 5m high by 2-4/i thick, 



slightly alternate toward apex, bearing on the summit a 



whorl of papillate basidia; basidia 10-12 by 4.5-5/i; 



Fig' 130. — conidia single, smooth, ellipsoidal, usually with acute ends 



Stackybotrys ^^^ mostly with two oil drops, slightly colored when 



hypha with young to fuliginous and black when mature. 



c'hlamydo- ^iah. Isolated from arable soil. North Cohocton, N. Y., 



S j) T € S X 



236.6; B, summer, 191 1, by the writer. Plant pathology herbarium 

 conidio- No_ ^024. 

 phores and '' , ; 



basidia I Stachybotrys cylindrospora n. sp. 



^^i/'i'. J^ Colonies round, thin, diffuse, becoming black with age; 

 conidia, x mycelium branched, septate, hyaline, 0.5-3^1; conidio- 

 236.6 phores hyaline at base, fuliginous toward apex, branched, 



septate, attenuate toward tip, 40-65^1 high, bearing on the summit from 

 3-9 sterigmata; sterigmata subclavate, with or without short papilla, 

 8- 1 1 by 4-5 m; conidia borne singly, smooth, subcylindrical to sometimes 

 ovate, 6-16 by 3.8-5/x, hyaline when young, becoming fuliginous and 

 nearly opaque with age. 



Hab. Isolated from arable soil. North Cohocton, N. Y., August, 191 1, 

 by the writer. Plant pathology herbarium No. 5,925. 



Coloniis rotundis, tenuibus, effusis, nigrescantibus ; mycelio ramoso, 

 septato, hyalino, 0.5-3/1; conidiophoris basi hyalinis, versus apicem fuli- 

 gineis, ramosis, septatis, versus apicem attenuatis, 40-65^ in altitudine, 

 apice 3-9 sterigmata ferentibus; sterigmatibus sub- 

 clavulatis, cum vel sine papillula, 8-1 1 x 4-5^; conidiis 

 solitariis, levibus, subcylindricis vel ovatis, 6-16 x 3.8-5/i, 

 primum hyalinis, deinde fuligineis et demum fere opacis. 



Hab. In humis. North Cohocton, N. Y., Amer. bor. 



Hormodendrum Hordei Bruhne, in Zopf's Beitr. 4: 1-42. 

 pi. 9. 1894. 



Colonies brown at maturity, circular, dense; mycelium sta'chyVo'trys 

 brown, septate, branched, 3-6/x thick; conidiophores simple, cylindrospora. 

 septate, ascending or erect, 50-100/1; conidia various, some basidi'al celh 

 cylindrical with ends rounded, truncate, or subattcnuate, and conidia, 

 others ellipsoidal, ovate, or subglobosc, regular or some- "^ "^^ ' 

 what angled, v>dth age many become uniseptate and verrucose, 4-14 by 

 3-5JU, chains of conidia short. 



