450 THALLOPHYTES 



TRIBE 4. CALICIA^CEAE. 



Apothecia, orbiculate, or globose, always open, margined by a proper exciple, the 

 disk collapsing into naked sporidia ; or immarginate, and the sporidia capituli- 

 form-compact. 



605. TRACHYI/IA, Fr. 



[Gr. Traehys, rough ; the apothecia being scabrous with naked spores.] 

 Apothecia sessile, discrete from the thallus, orbiculate ; disk some- 

 what compact, ascigerous, margined by the innate carbonaceous 

 proper exciple, or the exciple obsolete. Asci oblong. Thallus crusta- 

 ceous. 



1. T. Stigonella, Fr. [Small-dotted] : Parasitic ; exciple cupu- 

 lar, innate, disk plack, black-pulverulent, equalling the thin erect 

 black margin. 

 Hob. On the crust of Pertusaria pertusa : rare. 



606. CAM'CIVM, Per*. 



[Gr. Kalykion, a little cup ; in reference to the Apothecia.] 

 Apothecia crateriform, the carbonaceous proper exciple margining a 

 compact or powdery disk, composed of coacervate naked sporidia. 

 Thallus crustaceous. 



SECTION 1. Apothecia stipitate. 

 GLAUCESCBNTIA : Extiple more or less whitish-cinereous-pruinose. 



1. C. Subtile, Pers. [Delicate] : Crust filmy, leprous, white- 

 glaucescent; stipes filiform, flaccid, black; apothecia lentiform- 

 globose, naked, black, the margin at length reflected. 

 Hob. On old decaying wood; fences, &c. 



SUBORDER II. ANGIOCARP'I. 



jApathecia closed, nucleiferous, pertuse and with an ostiole, or irregularly dehiscent, 

 the nucleus included, subglobose, ascigerous. 



TRIBE 1. ENDOCARPAX2EAE. 



ApotJiecia immersed in the thallus, globose, the thalline exciple attenuated into a 

 neck, and terminated by a discrete heterogenous papillaeform ostiole; nucleus 

 deliquescent ; ViaUus horizontal, foliaceous, or crustaceous. 



607. EffDOC ARP'OIV, Hedw. 



[Gr. Ihtdon, within, and Karpos, fruit ; descriptive of the fructification.] 

 Apothecia included in the thallus, globose ; a membranaceous thin 

 pale thalline exciple inclosing a gelatinous colored deliquescent 

 nucleus ; ostioles somewhat prominent. Thallus horizontal, cartila- 

 gineous-foliaceous, subpeltate. 



1. E. Mulileiibersrii, Ach. [Muhlenberg's] : Thallus cartila- 

 gineous-coriaceous, thick, from greenish-glaucous becoming fusees- 

 cent, very finely rugose and somewhat chinky ; under side fuscous- 

 black ; ostioles convex. 

 Hob. On dry Serpentine rocks ; Smedley's Barrens. 



