60 ACOTYLEDONS. LICHENS. PelttdeCl. 



Hab. On the earth in moist situations, among rocks, most frequent 

 in the Highlands ; Glenkill Linn and Burn, Dumfries -shire. Dr. 

 Burgess. Pass of KilHcrankie, Mr. Turner and Hook. On the 

 earth of walls, Blair in Athol, Mr. Borrer and Hook. 



This is a small but very pretty species. 



2. P. sculata, thallus ash-coloured whitish and veiny beneath, 

 the lobes rounded sinuated and cut crenate and crisped, fertile 

 lobules very short, apothecia orbicular ascending nearly plane 

 brown somewhat entire. Ack. Syn. Lick. p. 237. Lichen 

 scutahis, E. B. t. 1834. 



Hab. Bark of trees, Dickson. I believe verv rare. I never saw it 

 any where but upon trees in the Duke of Argyle's grounds at In- 

 verary, in company with Mr. Turner. 



3. P. horizontalis, thallus glaucous and brownish green lobed 

 crenate and shining jiale beneath with numerous brown branch- 

 ing reticulated veins, fertile lobules abbreviated, ajiothecia 

 terminal plane horizontal transversely oblong reddish brown 

 with a nearly entire margin. Ack. Syn. Lick. p. 238. Lichen 

 horizontalis, Light/, p. 849. E. B. t. 8SS. 



Hab. Moist shadv rocks and about the roots of trees, not uncommon, 

 Lightf. 



4. P. aphthosa, thallus green smooth roundly lobed sprinkled 

 with brown warts, whitish beneath with brown branching veins, 

 fertile lobules very long contracted in the middle their sides 

 refiexed, apothecia terminal large ascending red-brown with 

 a lacerated margin. Ach. Syn. Lich. p. 238. Lickenaphtkosus, 

 Light/, p. SAT. E.B.t. 1119. 



Hab. Moist situations among rocks and moss, or by the roots of trees. 

 Foot of the Pentland Hills, Mr. lalden. Moist rocks near the Falls 

 of the Clyde, with shields, Mr. Turner and Hook. 



A large handsome species ; has its name from the circumstance related 

 by Linna2us, that the Swedirh peasants boil it in milk as a cure for 

 the aplitha, or thrush, in children. 



.5. P. canina, thallus greyish green with broad rounded lobes, 

 wiiite beneath with brownish branching veins, fertile lobules 

 rather long with their sides reflexed, apothecia terminal nearly 

 erect revolute reddish brown with a subcrenulatetl border. 

 Ack. Syn. Lich. p. 239. Lichen caninus, Light/, p. 845. 

 E. B. i. 2299. 



/3. ru/acenSy thallus polyphyllous concave reddish brown, pale 

 reddish white beneath with obsolete veins, lobes rounded in- 

 curved, fertile lobules short, apothecia terminal erect roundish 

 dark brown nearly entire at the margin. E. B. i. 2300 {Lichen 

 tn/escens). Peltidea canina, /3,? Ach. Syn. Lich. p. 239. Li- 

 chen canimis, /3. Light/, p. 846. 



Hab. Upon the ground, among moss, roofs of houseSj trees, &c. very 

 common, p. with a. 



