Fungous Flora of the Soil 



481 



Fig. 116. — Trichoderma lignorum 

 (Tode) Harz. A, sporangio- 

 phores, x 355; B, part of spo- 

 rangiophore with conidial head, 

 X 800 



Colonies orbicular, tufted, zonate, at first pure white, then later from 

 the center toward the periphery gradually turning light green, finally 

 becoming darker green, occasionally yellow- 

 ish green; vegetative hyphae creeping, 

 hyaline, septate, branched; conidiophores 

 arising as side branches of the mycelium, 

 ascending, nonseptate, di- or trichotomously 

 branched; last branches clavate to lageni- 

 form, 8-10 by 2.5^1, supporting the 7-9/x-in- 

 diameter conidial head ; conidia light green, 

 globose, 2.5-3At in diameter. 



Hab. Isolated constantly from soil about 

 Cornell University, Ithaca, N. Y., by the 

 writer. Plant pathology herbarium No. 5,910. 



Corethropsis paradoxa Corda, Prachtflora, i. pi. i. 1839; Flor. 111. 

 Muc. Eur., I. pi. I. 1840. Sacc. Syll. Fung. 4: 62. 1886. Lindau, 

 Rab. Krypt. Flora Abt. 8, i: 118. figs. i-j. 1904-1907. 



Syn. Stachylidium paradoxum Bonord., Handb. AUg. Myk., no. fig. 152. 1851. 

 Hyphae whitish, united to form ascending bundles on base of which 

 grow forth the septate di- or trichotomous conidiophores; conidiophores 

 swollen at the summit, with obclavate sterigmata; conidia ovate, standing 

 singly, hyaline. 



Hab. On soil near Prague, Corda. 



Aspergillus fumigatus Fres., Beitr. 81. pi. 10, figs. i-ii. 1863. Sieben- 

 mann, Die Schimmelmykosen, 5. pi. i, figs, j, 4, 6, 7. 1889. Schroeter, 

 Schles. Krypt. Flora Pilze 2: 216. Sacc. Syll. Fung, i: 65. 1886. Weh- 



mer, Aspergillus, 70. pi. i, No. j; pi. 4, No. j; 

 P^- 5' fi?,- 2. 1 90 1. Lindau, Rab. Krypt. Flora 

 Abt. 8, 1:133. fig- I- 1904-1907- 



Colonies orbicular, at first light green, finally 

 becoming very dark green; hyphee creeping, 

 branched, septate, hyaline, 1.5-6/x thick; conid- 

 iophores 200-400^1 high, 3.5-6/x thick, ascending. 

 Fig. iij. — Aspergillus erect, hyaline, usually unbranched, uniseptate, 

 fumigatus Fres. A, conid- toward the summit enlarging into a globose 



lopnore and conidial . . . 



head, X 236.6; B, globose swelling of 10-20^ in diameter; sterigmata cylin- 



swelling of conidiophore, drical to clavate, h valine, 6-8 by i. 5-2 u, simple, 

 snowing sterigmata, x . , ,' j o r-^ i > 



236.6; C, optical section continuous; conidia broad ovate to perfectly 

 0/^ g/o&o.e swelling, x globose, 2. 5-3. 5m in diameter, smooth, catenulate, 



chains short. 

 Hab. Isolated from soil of plant-breeding experimental plats, Cornell 

 University, Ithaca, N. Y., frequently, and from roots of pepper and of 



