PJnjmrum. 299 



France; Switzerland; Algiers; S. Africa; United States; 

 Ceylon ; Australia ; India. 



Varying from -5—2-3 mm. when elongated ; some forms of 

 the present species resemble externally Didyminm scrpula, Fr., 

 but are readily distinguished under the microscope. 



Var. ovoidcutn, Sacc. Sporangia vertically ovoid, densely 

 gregarious. 



riiymruvi cinercum, var. ovoidcuvi, Sacc, Mich., ii., p. 334. 



Britain (Lyndhurst, New Forest) ; France. 



(Rostafinski's Synonyms.) ^ 



Mncilago crusfacca, Mich., Gen., t. 96, f. (1729). 

 Lycoperdon cincreum, Batsch, fig. 1G9 (1783). 

 Lycoperdon alni, Bjer., in Vet. Handl, p. 39 (1789). 

 Trichia caerulea, Trent., p. 229 (1797). 

 Physarum cincreum, Pers., Syn., p. 170 (1801) ; Nees, f. 107; 



Let ell., t. 710, f. 2. 

 Fhysaruvi violaccnm, Schum., Saell., 1428 (1803) ; Fl. Dan., 



t. 1980, f. 2. 

 Fhysarum corrugatum, Link, Herb. 

 Physartt77i coelahim, Ehr., Herb. 

 Fhysarum conglolatum, Fr. Gast., p. 21 (1818); Letell., 



t. 710, f. 3. 

 Didymium cincreum, Fr., S. M., iii., 126 (1820); Eng. Fl., 



v., p. 314; Cke., Hdbk., 1133. 

 Fhysariim plumhcum, Fr., S. M., iii., 142 (1829). 

 Fhysarum Weinmanni, Fr., var. in litt. 

 Didymium melanoims, Wallr., n. 2193 (1833). 

 Fhysarum sinuosum, Wallr. 



Didymium scrohiculcdum, Berk., Hook. Journ. (1845), p. ijQ>. 

 Fhysartim album, Fuckel, F. Rhen., 1469 (1865). 



Var. ficxuosum, sessile on a broad base, depressed, spherical 

 in outline, or elongated and variously curved, wall at first white, 

 becoming grey when the outer chalky layer has broken away 

 in flakes; columella ab-scnt; capillitium dense, threads thin, 

 2 ju diameter, culnirless, Jlcxuous or spindly coiled, furnished 



