Collema.] LICHEN ES. 2 1 3 



26. C. sinudtum, (sinuated Collema); thallus foliaceous mem- 

 branaceous imbricated dark glaucous-green, the lobes crowded 

 small rounded incised nearly entire suberect plaited, apothecia 

 scattered sessile brownish, the border entire. — Lichen sinuatus, 



Huds. — E. Bot. t. 772 Collema Scotinum, (3. Aeh. Syn.p. 374. 



— Dill. Muse. t. 19./. 33. 



On rocks and walls and among mosses. Appin, Scotland, Capt. 

 Carmichael. 



27. C. tremelloides, Aeh. (Nostoc-like Collema); thallus folia- 

 ceous membranaceous thin smooth on both sides subdiaphanous 

 leaden-green, entirely lead-coloured and opaque when dry, tho 

 lobes ascending rounded somewhat cut, apothecia scattered 

 rather elevated flat reddish with a smooth pale border. — Aeh. 

 Sin. p. 325. — Lichen tremelloides, Linn. — E. Bot. t. 1981. — 

 L. cochlears, Dichs. Cr. Ease. \. p. 13. t. 2.f. 9. 



Upon rocks, among mosses in mountainous countries, especially (in 

 Scotland) near the sea. — Dark-coloured and pellucid as are the fronds 

 of this Lichen when fresh and moist, they are singularly opaque and pale 

 leaden-coloured when dry. 



28. C. Idcerum, Aeh. (jagged Collema); thallus foliaceous 

 membranaceous subdiaphanous ascendant bluish-brown the lobes 

 dilated finely jagged and fringed, apothecia scattered minute 

 concave red with a thick border. — Aeh. Syn. p. 327. — Lichen 

 lacerus, Aeh. Prodr. — L. lacer, E. Bot. t. 1982. — L. tremel- 

 loides, Huds. — Trc nulla lichenoides, Linn. 



Upon walls and rocks among mosses, in various situations. 



#*# Thallus cut into numerous slender branches. 



29. C. subtile, Aeh. (Jine-spu?i Collema); thallus blackish-green 

 substellated cut into numerous minute very narrow linear im- 

 bricated and appressed bluntish lacinia\ apothecia central nearly 

 plane brownish with a narrow entire border. — Acli. Syn. ]>. 32$. 

 — Lichen subtitis, Schrad — Bernh. in Schrad. Journ. v. 1. p. 5. 

 t. 2.f. 6. Dichs. Cr. Ease. 4. p. 2S. E. Bot. t. 1008. 



On moist earth, especially of a clayey nature. 



30. C. tenuissimum, Aeh. (fine-cut Collema); thallus imbri- 

 cated cut into numerous minute linear multifid unequal granu- 

 lated rather acute very crowded segments of a greenish-black 

 colour, apothecia scattered nearly Hat reddish-brown with ■ 

 thick entire border. — Aeh. Syn. p. 328. — Lichen ttnuisrimus, 

 Dichs. Cr. Fate. I. t. 2./ B, ' /•/. Bot. t. 1427. 



On dry Bandy banks, among mosses and short gra 



81. C. St /iidfh '/•/'. Aeh. ( Srhrudi ri<m ( nil, nut ); thalln^ B8BS- 



pitose erect branched the branches linear Forked compressed 

 wrinkle. I here and there constricted obtuse, apothecia lateral 

 reddish with a pale border— ^4rA. Syn. p. 328, I '. B< t t 2284. 

 — Lichen Schraderi, Bernh* in Schrad. Journ. 17 ( >!». r. \,p, l'l\ 

 t. -2.J. :>. 



On the ground, in clayey soil, among n rocks and on walla, 



