PLANTS OF IOWA 39 



Gyromitra. 



419. G. esculenta, Fries. 

 Bare. 



RHIZINACE^E FAMILY. 



Sph^erosoma. 



420. S. echinulatum, Seaver. 



On damp clay soil. A rare genus. 



PYRONEMACE.E FAMILY. 



Pyronema, Cams. 



421. P. omphalodes, (Bull) Fckl. 

 Common on sandy banks in woods. 



422. P. aurarrfio-rubrum, (Fckl.) Sacc. 



Similar to preceding but distinguished by smaller 

 sporida. Autumn. 



423. P. melalomum, (Fries) Fckl. 



Very common on burnt places. Summer and autumn. 



PEZISACE^ FAMILY. 



Sph.erospora, Saccardo. 



424. S. confusa (Cooke) Sacc. 

 Common on sandy banks in woods. 



Lachnea, Fries. 



425. L hemisherica (Wigg) Gill. 

 Common on naked soil in woods. 



426. L. scutellata (Linn) Sacc. 



Very common on decaying wood in moist places, often 

 among moss plants. 



427. L. setosa (Nees) Sacc. 



Rather common on decaying wood. Often very numer- 

 ous and gregarious. 



428. L. Hrta (Schum) Sacc. 



Rather common on the ground in wet places. 



429. L. melaloma, (A. and S.) Sacc. 



Found on burnt wood and the surrounding soil. Not 

 common. 



