Compositae banks of the San Pedro September 3, 1851 
w low banks of the San Pedro , 2-4 ft. tall 
Ambrosia do. , i-2§- ft. tall 
Erythraea do. 
algae on naked aluminous soil of the San Pedro Sept. 10 , 1851 
Euphorbia low damp soil near the San Pedto 
do. 
Helianthus do. 
Aster do. 
Cuscuta do. 
Dieteria alluvial lands near the San Peiro 
Physalis prairies of the San Pedro 
Sept. 11 . 18SI 
, on Ambrosia 4 Helianthus^ 
Verbenaceae ^mountain valleys betw. the San Pedro and Santa Cruz,Sept. 12 .'SI, 
^ alluvial soil 
do. ,stony soil 
Amar y 111 da dfea 
Rubiaceae 
Krameria 
Diodia 
Malvaceae 
Compositae 
Desmodium 
Majipighiaceae 
,rocky places 
,stoney soil 
,stony soil 
.stony soil 
,bed of small stream 
.banks of small stream . 
do. .stony places, 
much branched from the root 
43 ^* Amaranthaceae mt. valleyB bet. the San Pedro and Santa Cruz ,2 ft. high 
bed of smell branches 
437. Dipteracanthus mountain valleys towards Santa Cruz, stony soil,many stems 
43S. Hymenatherum do. 
499 ♦ Convolvulus do. 
5OO. Leguminosae 
.root tuberous Sept. 13 , *51 
stony soil 
.under oaks,many stems 
from the root 
Heliomeris Valleys of Sonora,stony soil, many stems from one root 
Apocynaceae Valleys of Sonora on hillside 
