PEBBLE PLAINS, BALDWIN LAKE ECOLOGICAL RESERVE,
SAN BERNARDINO MTS
APRIL 2012 PAGE TWO


   
Alkali draba
Cusickiella douglasii
Brassicaceae


 
Undetermined rock-cress hybrid
Boechera sp.
Brassicaceae

[Wayne Armstrong has photographed the pollen grains and they are spherical, which
seems to suggest that this is a hybrid of one of the former B. holboellii complex and
something else. The Boechera taxa are apparently notorious for their hybridizing.]
 



Photograph taken by Wayne Armstrong of pollen grains of the Boechera from
Pebble Plains. This species is a triploid hybrid probably from the diploid Boechera
retrofracta
and some other unknown parent. This is the taxon that has been
identified routinely in the San Bernardinos and San Jacintos as B. holboellii but
now must await further work before the assigning of a taxonomic name.


 
 
Southern mountain phlox
Phlox austromontana
Polemoniaceae
 
 



 
Bee fly female [on Ivesia argyrocoma var. argyrocoma]
Conophorus sp.
Bombyllidae
[See other photos of the plant on page 3. Scott Elaison notes that he rarely sees
this species in bloom without bee flies hovering around them]


   
Parish's lomatium, Parish's biscuitroot ^
Lomatium nevadense var. parishii
Apiaceae


 
Rayless fleabane
Erigeron aphanactis var. congestus
Asteraceae

[Below right: bizarre form where it appears that several flowers have fused together]
 



   
Mojave linanthus
Leptosiphon breviculus
Polemoniaceae


   
Columbia cutleaf
Hymenopappus filifolius var. lugens
Asteraceae
 
 
Ashy-gray paintbrush
Castilleja cinerea
Orobanchaceae


 
 
 
cf. Spreading fleabane
Erigeron divergens
Asteraceae