The IMyxontycclcs of the Miami I'alley, Oliio. 25 



.6-. 8 mm. A half dozen threads proceed from the inner wall 

 of the stipe branch twenty-five or thirty times, and afford 

 scarcely half a dozen free ends. 



4. Hemiarcvki.v stipata, vSchw. Sporangia terete, elon- 

 gated and fle.KUons, closely packed together and lying npon 

 one another, stipitaie, from bright incarnate to brick red or 

 bay in color, smooth and shining; the wall thin and fragile, 

 soon disappearing, except a small cnp-shaped portion at the 

 base. The stipes very short, often entirely concealed by the 

 dense mass of sporangia, arising from a common hypothallus. 

 Capillitinm of threads somewhat variable in thickness, 3-6 

 mic, repeatedly branched and forming a netw^ork of very 

 nnequal meshes, with occa.sional clavate free extremities, pale 

 to dark red in color ; the spiral ridges three or four, often 

 irregular, thickened or interrupted by minute warts and 

 spinules. Spores in mass incarnate to brownish-red, globose, 

 even, 7-9 mic. in diameter. 



Growing on old wood of Liriodendron. Sporangia usually 

 in small patches, each 1-2 mic. in length, the stipe very thin 

 and short. 



>52. Hemitkichia. Capillitium of ver}' long slender threads, 

 simple or remotely branched, and not forming a network, 

 their further extremities all free. 



The threads of the capillitinm in these species are usually 

 much coiled and entangled, but when straightened out they 

 are seen to be very long, but few in number, fixed at one end 

 and free at the other. 



5. Hemiarcvria longifiIvA, Rex. Sporangium obovoid 

 or pyriform, yellow, stipitate ; the wall a thin pellucid mem- 

 brane, smooth and shining, beautifully iridescent, breaking 

 away above the middle, the lower cup-shaped portion per- 

 sistent. Stipe very short, reddish-brown to blackish, arising 

 from a common hypothallus. Capillitinm of slender threads, 

 3.5-4 mic. in thickness, golden yellow in color, simple or very 

 rarely branched ; the free extremities obtuse or slightly 

 swollen, sometimes minutely apiculate ; the spiral ridges, 

 three or four, rather distant, with very minute scattered 

 spinules or nearh' smooth. Spores in ma.ss, golden-3'ellow, 

 globose, minutely warted, 9-10 mic. in diameter. 



