42 VERRUCARIACEAE— HYPOCREACEAE 



v. Perithecia with fascicled nearly horizontal hairs at apex 



Trichothelium 75 



b. Thallus foliose or scaly Subfamily Dermatocarpae 58 



(1) Algae Palmella 



(a) Hymenial algae lacking 



x. Paraphyses lacking, or fused into a mass 



(x) Paraphyses lacking; thallus without cortex 



Normandina 59 

 (y) Paraphyses fused; thallus corticate 

 m. Spores i-celled, colorless Dermatocarpum 60 



n. Spores septate 



(m) Spores colorless Placidiopsis 60 



(n) Spores brown Heterocarpum 60 



y. Paraphyses persistent 



( x ) Spores i-celled, brown Anapyrenium 59 



(y) Spores muriform, colorless Psoroglaena 59 



(b) Hymenial algae present Endocarpum 61 



(2) Algae Chroolepus; spores colorless, i-celled 



Lepolichen 69 



(3) Algae Prasiola Mastodia 241 



c. Thallus fruticose, branched, with Pleurococcus ; spores muriform, brown 



Pyrenothamnia 61 



II. Perithecia in a stroma (Cfr. Pertusariae, page 79.) 



1. Perithecia upright, with individual pores 



Subfamily Trypetheliae 69 



a. Spores colorless 



(1) Spores transeptate 



(a) Spores oval to fusiform Trypethelium 70 



(b) Spores filiform Tomasiella 69 



(2) Spores muriform Laurera 71 



b. Spores brown 



(T) Spores transeptate Melanotheca 70 



(2) Spores muriform Bottaria 71 



2. Perithecia oblique or horizontal, with a common canal or pore 



Subfamily Astrotheliae 72 



a. Spores transeptate 



(1) Spores colorless Astrothelium 73 



(inch Lithothelium 73) 



(2) Spores brown Pyrenastrum 73 



b. Spores muriform 



(1) Spores colorless Heufleria 74 



(2) Spores brown Parmenteria 74 



III. Perithecia sunken in stroma-like warts; horizontal thallus lacking; asci many- 



spored ; spores 1 -celled, clear Thelocarpum 150 



Family 20. HYPOCREACEAE 



2: 447, 9: 941, 11: 354. 14: 621, 16: 559. 17: 777. 



Mycelium scanty and immersed or producing a subicle or a stroma; perithecia 



