Physamm:[ FU.N-GI. 315 



dry, is longitudinally plicato-sulcate. I have gathered a form with a 

 verv striking JiijpotJiallus, and the peridia not umbilicate, but agreeing 

 in the \\h\tQ Jlocci and other distinguishing features. The y/occi are 

 described by Dr. Greville as dark; and they appear so if the sporidia 

 be not completely blown away. 



2. P. bulbiforme, Schum. (hulb-shaped Ph/sarwn) ; peridium 

 lieinispherical umbilicate beneath erect black purple, stem 

 attenuated sulcate dirty-white, flocci and sporidia brown-black. 

 Fl. Dan. t. 1974. /. 3. Fr. Syst. Myc. v. 3. p. 131.— P. sul- 

 catum, Link, Berl Mag. v. 3. p. 27. Grev, FL Ed. ;;. 453. 



On rotten wood. Swanston wood. Pentland hills, &c. Dr. Greville. 



It appears doubtful whether the plants of Schumacher and Link are 



really the same ; and if so, the same doubt would remain as to the 

 species of Dr. Greville. I, therefore, subjoin the character as given, 

 principally from Link, in the Fl. Ed. " Head globose, flattish beneath, 

 grey inclined; stem rather long, pale, weak sulcate; sporidia dark-brown." 



3. P. ruhiginosimiy Chev. {rust-red Physarum) ; peridia glo- 

 boso-turhinate rust-red as well as the slender stem, flocci reti- 

 culated white, sporidia black. Chev. Par, l.p. 338. Fr. Syst. 

 Myc.v. 3.;?. 137. 



On trunks of trees amongst moss. Appin. Captain Carmichael. — 

 The specimens before me agree in so many respects with Chevallier*s 

 description that I can scarcely doubt that they belong to his species. Li 

 the present instance, however, the stem penetrates the peridium, but, 

 from the close adherence of the coat, not in such a manner as to form 

 an evident umbilicus, nor distinct columella, and it is not paler than the 

 peridium, nor is the hypothallus paler. The upper portion of the peri- 

 dium is nearly white as if bleached. 



4. P. hyaUmtm, Pers. (hyaline Physarum) ; peridia globose 

 inflated very delicate whitish, stems fasciculate flaccid ascending 

 rufous, flocci white, sporidia black. Pers. Disp. t. 2. /. 2, 3. 

 Fr. Syst. Myc. v. 3.;;. 139. 



On rotten wood. A[)pin. Captain Carmichael. — Trichia rnbi- 

 fonnis, Purt. t. 37, is possibly the same species. 



** Adnate. 



5. P. sinunsum. Bull, (hiialve Physarum); peridia com- 

 pressed elongato-flexuous venulose dirty greyish-white splitting 

 in a labiate manner, flocci white reticulated, sporidia black- 

 l)rown. 7'V. Syst. Myc. r. 3, p. 14.}. — J\\t. sinuosa, Pull. t. 44(j. 



f. 3. Sow. t. ('). — An(/ioridiH)n si/iuosum, Grcv. Sc. Crypt. Fl. 

 t, 310. 



On various substances. Not rare.— Dr. Greville has formed a new 

 genus for the reception of this species, but the filaments, which are 

 branciieil, and not sinii)lc, as r( presented in his figure, are precisely of 

 the same nature as in Didymiuin ci/urmm and other species ot this 

 and neighbouring genera. 



G. P. album, Nees, ( Jlat white Physarum) ; peridia very 

 delicate subrolundo-depressed adnate even dirty-white, flocci 



