34 CONNECTICUT GEX)L. AND NAT. HIST. SURVEY. [Bull. 



well defined, and of these groups the species given below may 

 be considered typical members : — 



XEROI'HYTES. 



I. Plants growing on exposed rocks with little or no earth 

 covering — trap ledges, stone walls, bowlders, etc. 



Frullania Asagrayana Grimmia Olneyi 



Andrecea Rothii Ulota Hutchinsice 



Hedwigia albicans 



2 Plants growing on living trees in the open or in the 

 woods. 



Frullania eboracensis Drummondia clavellata 



Orthotrichum ohioense Leucodon julaceus 



Thelia hirtclla 



3. Plants growing on earth, or on rocks with a thin earth 

 covering in fields and along roadsides or in dry woods. 

 Nardia crennlata Pogonatum tenue 



Diplophylleia apicnlata Thelia Lcscurii 



Physcomitrium turbinatum Rhynchoste gium serrulatum 



Mesophytes — for the most part shade-loving plants, but 

 frequently found in the open on the borders of brooks, 

 in meadows, etc. 



1. Plants growing on the surface or in the crevices of 

 cliffs and steep rocks. 



Rcboulia hemisphcerica Rhabdozveisia denticidata 



Leucolcjcunca clypcata Didymodon rubellus 



Hymcnostylium cun'irostre 



2. Plants growing on soil or humus, on flat earth-covered 

 rocks, on the roots and at the base of trees,"or on decaying 

 logs and stumps in wet woods, 



Lophocolea heterophylla Poly trie hum ohioense 

 Ptilidium pulchcrrimum Ptilinm Crista-Castrensis 

 Timmia cucullata Climacimn americanwn 



