SUNRISE HIGHWAY, LAGUNA MOUNTAINS OCTOBER 2008
PAGE ONE
Photographs by Michael Charters




Today I drove down the Sunrise Highway from Cuyamaca Lake to I-8, stopping at a number of locations. The Lagunas are pretty dry right now, and many things are in seed, thus somewhat difficult to identify. The purpose of this trip was to photograph the Machaeranthera asteroides var. lagunensis that Tom Chester reported several days ago. This taxon has been on my top priorities list for some time and I'm glad to have finally seen it, although the excitement factor was definitely lessened by the fact that it looked so similar to typical Machaeranthera canescens. Southern California species of Machaeranthera are being divided among four genera: Machaeranthera, Arida, Dieteria and Xanthisma. The Jepson Manual 1st edition suggested that M. asteroides may not in fact be separate from M. canescens, but the 2nd edition will apparently retain the separation with Dieteria canescens and D. asteroides being recognized. Thus the taxon under consideration here, which is a rare one previously called Machaeranthera lagunensis, will receive the taxonomic appellation of Dieteria asteroides var. lagunensis. I have decided for practical reasons not to change the names in my website until the 2nd edition is published. An upside-down V next to the common name below indicates a taxon that was new to me when I photographed it on this field trip.


   
Southern mountain woolstar
Eriastrum densifolium ssp. austromontanum
Polemoniaceae
 
Laguna Mountains goldenbush ^
Ericameria cuneata var. macrocephala
Asteraceae
 
Wand wirelettuce
Stephanomeria virgata ssp. pleurocarpa
Asteraceae


 
Indian Valley bush mallow
Malacothamnus aboriginum
Malvaceae


 
 
Giant four o'clock
Mirabilis multiflora
Nyctaginaceae
 
 
Skunkbush
Rhus trilobata
Anacardiaceae
Slender-leaved sunflower
Helianthus gracilentus
Asteraceae
California goldenrod
Solidago californica
Asteraceae
California buckwheat
Eriogonum fasciculatum
Polygonaceae


 
 
Scarlet bugler
Penstemon centranthifolius
Scrophulariaceae
Foothill penstemon
Penstemon heterophyllus var. australis
Scrophulariaceae
 


   
Wright's thimblehead
Hymenothrix wrightii
Asteraceae


 
Basin sagebrush
Artemisia tridentata ssp. tridentata
Asteraceae


 
 
Pine dwarf mistletoe
Arceuthobium campylopodum
Viscaceae
 
Birch-leaf mountain mahogany
Cercocarpus betuloides var. betuloides
Rosaceae
California black oak
Quercus kelloggii
Fagaceae
   


 
Parish's Jacumba milk-vetch
Astragalus douglasii var. parishii
Fabaceae
 
Willow-herb
Epilobium ciliatum ssp. ciliatum
Onagraceae


   
Leafy daisy, Fleabane-aster
Erigeron foliosus var. foliosus
Asteraceae
 
Wright's buckwheat
Eriogonum wrightii var. membranaceum
Polygonaceae
 
Golden stars
Bloomeria crocea
Liliaceae