As we descended Upper Black Top Mesa Pass into Bluff Spring Mountain canyon we found, foreground, Palo Verde and brittle bush, and, midground, Saguaro. The presence of Palo Verde reveals water flows through this area intermittently though not enough to sustain a large tree. Palo Verde is in the pea family (Fabaceae), as evidenced by production of seeds in pods.
Calling it “Buff Mountain” some say the mountain is named for these buff-colored cliffs. Others, calling it “Bluff Spring Mountain” name it for the cliffs and the spring within a canyon on top.
Bluff Spring Mountain from the slopes of Black Top Mesa
Closer to the junction with Terrapin Trail this Bluff Spring Mountain ridge rose above us. A fine specimen of mature Saguaro cactus is in midground.
Our second day began in East Boulder Canyon, in the following map it is at the foot of the “Z” of the orange line, the Dutchman Trail, lower left center. The shape is the signature of a switchback needed to negotiate a steep slope up to Upper Black Top Mesa pass. This day will see us traverse Dutchman Trail to the intersection with Peter’s Trail (yellow), another steep climb up Peter’s Mesa.
A topographic map including Yellow Peak with Dutchman Trail in orange. Upper Black Top Mesa Pass lower center.
Today’s post features photographs of flourishing Sonoran Desert plants and landscape on the slopes of Black Top Mesa. Dipterostemon capitatus known by the common names blue dicks, purplehead and brodiaea is native to the Western United States (particularly Arizona, California, Oregon, Utah, New Mexico and northwest Mexico.
Dutchman Trail above East Boulder Canyon, Palamino Mountain left, Yellow Peak in distance. We are on the side of Black Top Mesa.
Here I used the “zoom” for a better view of distant Yellow Peak. In foreground is Brittlebush (Encelia farinosa) and Blue Dick. In the distance Saguaro Cactus. Below the cliff of Black Top Mesa, above East Boulder Canyon, is a patch of yellow, Mexican Poppy (Eschscholtzia californica).
Slope of Black Top Mesa above East Boulder Canyon with the distant Yellow Peak.
Here is camera, set to zoom, is swung toward the mesa cliffs. Prickly Pear and Brittlebush growing along the Upper Black Top Mesa Pass trail. I have not identified the shaggy shrub above the Brittlebush. In the distance Saguaro Cactus (Carnegiea gigantean) flourishes. Below the cliff are patches of “gold dust”, the Mexican Poppy.
PCliffs of Black Top Mesa
Heading southeast climbing out of East Boulder Canyon with a very young Saguaro Cactus (Carnegiea gigantean) just off trail on left, a large specimen silhouetted on ridge ahead. Windmill Pink (AKA Common Catchfly) (Silene gallica) foreground, lower left. Brittlebush (Encelia farinosa) on both sides.
Upper Black Top Mesa Pass
This post ends as it began, with wildflowers growing next to the trailon a March morning. Blue Dicks (AKA Purplehead) (Dipterostemon capitatus), Tidy Tips (Layia) — daisy like flower, Brittlebush flowers are yellow when not dried. The larger small white flowers are Desert Phlox (Phlox austromontana) — I have not identified the tiny white flowers sprinkled around.
Michael Stephen Wills Photography 
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