http://tchester.org/sb/plants/guides/tram_sidewalk.html
Plant Guide to Palm Springs Tramway Sidewalk, San Jacinto Mountains Here is an example of how to use the guide. You begin at the Jeffrey pine on your left. There are lots of Jeffrey pines along this sidewalk; the estimate I put in the guide is 20 plants in at least 9 locations. After the Jeffrey pine, you have to walk 20 steps to the next species, the curl-leaf mountain-mahogany, which you'll find on your right. There are about 10 plants of this species in at least 4 locations. Also on the right, next to the curl-leaf mountain-mahogany, are the San Bernardino rubber rabbitbrush and the Grinnell's beardtongue. Immediately following those species the concrete sidewalk makes a sharp curve left, which is called a switchback.
# Steps S # Common Name Latin Name #here #all 0 l Begin guide at top of concrete sidewalk next to Tram Elevator Entrance; elevation ~8500 feet (2591 m) 0 l 1 Jeffrey pine Pinus jeffreyi 20 / 9 34 20 r 2 curl-leaf mountain-mahogany Cercocarpus ledifolius 10 / 4 4 0 r 3 San Bernardino rubber rabbitbrush Chrysothamnus nauseosus ssp. bernardinus 30 / 9 28 0 b 4 Grinnell's beardtongue Penstemon grinnellii var. grinnellii 20 / 5 23 0 Switchback left 13 r 5 white fir Abies concolor 5 / 5 32 16 Switchback right 19 r 6 San Jacinto Mts. keckiella Keckiella rothrockii var. jacintensis 1 / 1 12 9 r 7 canyon live oak Quercus chrysolepis 2 / 2 35 0 Switchback left 52 Switchback right 60 Switchback left 54 Switchback right 104 l closest canyon live oak Quercus chrysolepis / 12 l 8 wild tarragon Artemisia dracunculus 2 / 1 32 7 r 9 granite prickly phlox Leptodactylon pungens 2 / 2 15 0 r 10 goldenrod Solidago californica 10 / 1 49 46 r 11 Parish's bedstraw Galium parishii 1 / 1 14 78 l Sign: "Trail information"; end guide # Steps: The number of steps from the previous entry in the guide to the current entry. Your mileage (aka step size) may vary!
S: Side of trail on which the first occurrence is found: left, right, both, or center
#: Species are numbered in order of first occurrence on trail.
#here gives the minimum number of on-trail plants of this species on this trail, with the number of locations on this trail following the /, using maximum values of 99/9. 1/1 means a single plant in a single location; 10/9 means 10 plants occurring in at least 9 locations, etc.
#all gives the number of plant trail guides, from all over southern California, that contain this taxon.