ii. Sporangia 8-10 mm.; spores verruculose 8. _S. webberi_ iii. Sporangia tall, 15-20 mm. or more 9. _S. splendens_ 2. Columella eccentric, sporangium in cross-section, angular 10. _S. fenestrata_ _c._ Spore-mass ferruginous; sporangia in tufts. 1. Spores smooth or nearly so. i. Sporangia pale, small, 3-5 mm., crowded, stipe unpolished 11. _S. smithii_ ii. Sporangia ferruginous; columella regular 12. _S. axifera_ iii. Sporangia ferruginous; columella proliferate just below the apex 13. _S. flavogenita_ iv. Sporangia, spore-mass, dusky-purplish or brown. O On dead wood. o Scattered, apex blunt 14. _S. pallida_ oo Clustered, acuminate 15. _S. carolinensis_ OO On living leaves, preferably, spore-mass brown 16. _S. herbatica_ 1. STEMONITIS CONFLUENS _Cooke & Ellis._ PLATE XI., Figs. 4, 4 _a_, 5. 1876. _Stemonitis confluens_ Cke. & Ell., _Grev._, V., p. 51. 1894. _Stemonitis splendens var. confluens_ Lister, _Mycet._, p. 112. 1899. _Stemonitis confluens_ Cke. & Ell., Macbr., _N. A. S._, p. 114. 1911. _Stemonitis confluens_ Cke. & Ellis, List., _Mycet., 2nd ed._, p. 147. "Sporangia fasciculate, confluent on a persistent hypothallus, dark fuscous; peridia very fugacious; stipes united at the base, erect, furcate; spores large, brown, globose. On oak bark. "The stems are branched in a furcate manner and confluent at the base, forming a compact tuft. The capillitium is membranaceous at the angles; spores very large compared with allied species, being 12 mu. The specimens were too fully matured for more satisfactory description."