159 
THE LICHEN FLORA OF HARDEN BECK 
VALLEY: 

THOMAS HEBDEN. 
(Continued from page 334). 
Lecanora ivrubata Nyl.—-On cement pointing, Ives Bridge. 
‘Scarce. 
Lecanora galactina Ach.—Stone walls and mortar, Culling- 
worth. Scarce. ° 
Lecanora dissipata Nyl.—Stone walls, cement, lime pointing, 
very common throughout the district. 
Lecanora urbana Ny\.—Always associated with Placodium 
decipiens Arn., Wicken Cragg. Scarce. 
Lecanora crenulata Nyl.—Common on mortar of walls, 
and Calliard sandstone. 
Lecanora Hagent Ach.—On decorticated Oak. Only one 
specimen seen, roadside Harden to Bingley. 
Lecanora varia Ach.—-On Ling stems, young branches of 
trees, stone walls. Common. 
Lecanora polytropa Sch.—On stone walls, rough sandstone 
outcrops. Common. 
Lecanora badia Ach.—On walls of rough sandstone, Harden, 
Black Moor. Only two specimens seen. 
Acarospora fuscata Nyl.—On rough sandstone at base of 
walls, Cullingworth, Harden, Flappet. Common. 
Acarospora rufescens Nyl.—On rough sandstone, on mica- 
ceous laminated sandstone, roadside Ryecroft, Harden. Not 
common. 
Acarospora smaragdula Nyl.—On micaceous, laminated 
sandstone. Frequent throughout district at highest elevations. 
Acarospora Lesdain N.S.—On vertical faces of stone walls, 
laminated sandstone, roadside, Ryecroft to Guide Stoop on 
Harden Moor. Plentiful. This species easily mistaken for 
A. smaragdula Nyl., but different re-action and size of spores. 
Sent to M. Boulay de Lesdain, of Dunkirk for verification, 
who sent it to Abbe Harmand, Docelles, Vosges, and named 
by him in honour of M. Boulay de Lesdain. No published 
description yet, owing to war. 
Acarospora pruinosa form nuda Nyl.—Buried in mortar 
of wall tops, Harden, Cullingworth, generally distributed. 
‘Common. 
Gyrophora polyphylla T. & B. form congregata.—On rough 
sandstone blocks, always on inclined plane, Harden .Cliff, 
Harden Moor, Catstone Moor. Not common. 
Gyrophora polyrrhiza Koerb.—On rough sandstone rock, 
1916 May 1. 

