RYDBERG: PHYTOGEOGRAPHICAL NOTES 453 
Restricted to the Northern Rockies 
Batrachium confervoides Lobelia Dortmanna 
Veronica scutellata 
D. MISCELLANEOUS FORMATIONS 
1. ROCK-SLIDES 
The rock-slides in the Subalpine Zone* resemble those in the 
Alpine Zone, and the flora is practically the same with a few 
additions, as shown by the following lists: 
Common to the Southern and Northern Rockies 
Selaginella densa. _Claytonia megarrhiza 
Oxyria digyna Macronema discoideum 
Restricted to the Southern Rockies 
Allium Pikeanum Polemonium delicatum 
Aquilegia saxtmontana Pentstemon Hallit 
Telesonix Jamesit ; es Harbouri 
Heuchera Halli "5 stenosepalus 
Ribes montigenum Syntheris plantaginea 
Viola biflora Machaeranthera Pattersoni 
Pseudopteryxia anisata Senecio Holmet 
Primula Parryt “«  Soldanella 
Lene Grayanum “*  Harbourit 
speciosum : ““ cathamoides 
' confertum Senecio invenustus 
* Brandegei 
Restricted to the Northern Roekies 
. Alsine americana Collomia debilis 
Telesonix heucheriforme -  Polemonium viscosum 
Ribes parvulum Hulsea carnosa 
Pseudopteryxia Hendersonit Senecio Fremontit 
2. BARE CLIFFS 
The flora of the crevices of the bare cliffs is practically the same 
as that of similar habitats in the alpine region. The species there 
have already been listed but are again enumerated below.T 
*See Bull. Torrey Club 41: 465. 10914. 
+See Bull. Torrey Club 41: 466. 1914. 
