390 



E. LUCY BRAUN 





rl^D 



7 / ^',; ^®y^4D7:' S Kd / iA-''j'.\/ a ,; •/' ■ /\ /t \a^at. 



'•/^ 



•rs 



THICK MAT }\Anf^i A% ' ■■ ■■ ,; • ■ • '^ I ■■ L ^"T ^ 



WK W'o 



A-Anomodon a ttenua res 



An-ANO/^ODON niNOR 

 AS-ASTER SHORTII 

 B-CAMRANULA AMERICANA 

 C-AauiLEG/A CANADENSIS 

 CrZ-CrSTOPTERIS auLBireRA 



D-Bermatocarpon miniatum 

 G-Galium Aparine 

 Qv-Geum vernum 

 H-HysTRix. patula 

 L -LESKEA SP 



/1-MA/IUn CUSPIOA TUM 

 0-OmPHALARIA 5P 



p- poa comrressa 

 Po-Porella platyphylla 



P- RHAPIDOSTEGIUM SP i 



r-/?Ri/S TOy^lCODENORON 



S-Sedum ternatum 

 v- verrucar/a r^uralis 

 Vr-Viola Rafine:so.uii ^ 



w- woodsia obtusa 

 wp-Camptosorus phizophyllus 



'/'- Grimm I A apocarpa 

 y-LEC/o/A SP. 



-AMPHILOMA LANU&INOSUr^ 



r\- Patch 



(.j-PATCH,//VDEr/^ir£ OUTLINE 



• -Plant in patch 

 ^'.-pleurococcus 



^ Ol R£C TION OF SL OPC 



^ -Placooium citrinum 



F g. 4. Belt transect showing relation of vegetation to steepness of slope; 

 direction of slopes, S25° W and N; transect follows rock profile shown above. 



rocks by a deep soil, and the consequent appearance of plants 

 from the surrounding forest, does not represent a step in the 

 rock succession, but rather the elimination of the rock habitat, 

 and .with it, of its characteristic vegetation. 



