Phacidium.] FUNGI. 291 



confluent rugose bursting byflexuous labiate fissures, disc pale. 

 Fr. Si/St, Mijc, V. 2. p. 569. Scler, Suec. ! 7i. 2Q7.—Xyloma 

 acerinumy Pers, Si/7i. p. 104-. Moug. &,- Nest.! 7i. 77. Dec, 

 I. c.f. 9. Grev. FL Ed. p. 367. Sc. Crypt. Fit. 118./. 1.— 

 Mucor grannhsus, Bull. t. 504. /. 13. \\ith. v. 4./>. 371. — b. 

 X. Psettdo-platani, Dec. I, c.f. 4, a., thin, seated on a yellowish 

 spot. 



On leaves of the common Sycamore and Maple. Extremely com- 

 mon, perfecting its fructification in Spring, b. Roslin. Dr. Greville. 



6. R. punctdlum^ Pers. (dot-lihe Ehijtisma) ; innate crowded 

 of a roundish but angular form shining black, bursting in little 

 fragments brown-black within. Fr. St/st. Mijc. v. 2. p. 569. 

 — Xyl. punctatum, Pers. Si/n. p. 104. Dec. I. c.f. 4. Moug. ^• 

 Nest. ! n. All . — Sjjhccria suhconfluejis, Purt. v. 3. p. 284. 



On Sycamore leaves. — Not so common as the last, of which Dr. 

 Greville and Mr. Purton consider it merely a variety ; but so far as I 

 can judge, from dry specimens, for I have never met with it, I believe 

 it to be distinct. 



7. R. Urticce, Fr. (^Nettle-stem Rhytismu) ; innate forming an 

 elongated ambient crust, tubercles slightly prominent even 

 bursting by a slightly flexuous fissure. Fr. Sgst. Myc. v. 2. 

 p. 510. Scler. Suec. ! n. 9. Moug. ^- Nest. ! n. 865. Purt. ! 



MSS. 



On dead Nettle-stems. Winter and spring. — Care must be taken not 

 to confound true Sphccricc with this species which is very dibtinct. 



66. Phacidium. Fr. Phacidium. 

 Perithccium orbicular, bursting from tlie centre towards the 

 circumference in many lacinia3. — Name, ^ax^j, a lejUil, and 

 iioo;, rescinhlance. 



* Perithecium entire (not dimidiate^ at length free. 



1. P. caltciifdrme^ Reb. (Calicium-lihe Phacidhim) ; naked 

 subsessile globoso-de})ressed rugoso-vcrrucose from minute 

 cracks opacpie black bursting with obtuse laciniie, disc pale. 

 F'L El. 2. p. 131. — Ceucuigium caliciiforme, Fr. Syst. Myc. v, 2. 

 p. 183. Pei's. Myc. Eur. 1. p. 333. t. 2. / 3, A.— Triblidium 

 caliciiformey Chcv. Par. t. '6.f 9. 



" On branches of Lime. Hamilton. Dr. Davidson^' M. Klolzsch.** — 

 It ap[)ear.s to me, however, very doubtful whether tiieir plant is correctly 

 named, and unl'ortunately, in my copy of Sdcronujcetcs Succuc, there is 

 no specimen. 



2. P. Patella^ Tode, (saucer- It lie Pliacldium) ; erumpont 

 sessile free at first more or less olivaceous, at lenglli blai k even, 

 disc depressed rarely open, dirty-white and then crownotl with 

 a toothed bord«'r. Fr. El.'2. p- 1 33. Scler. Sued n. 369. — 

 Sj)/t. P(dtll,i, Pii's. Syn.p.lQt. Moug.S)- Nvst.! ;<. 485. Grew 

 FL Ed. p. 353. Fr. Syst. Myc. v. 2. p. j\l. Purt. r. 3. 



