CONTRIBUTIONS TO WESTERN BOTANY NO. 15 99 



crawling along over the new track, brush all down, flattened down, little 

 pools still here and there in the bed. Skies clear. Rivers must have been 

 at least 54 mile wide at flood, but wo water in it now. Some call this the 

 Piscaya river. There arc some oak looking trees, may be olives, 20-40 

 feet high. 1,300 feet altitude now. Populus Fremonti cultivated. Tall, 

 bushy Cereus common, may be Thurberi. No farming in this region, all 

 cattle and few of them. 



Zamora, 900 feet altitude. A few tumbledown houses, no cultivation. 

 Grass mostly all gone. Brush everywhere, mesquit and palo verde, also a 

 thorny airy shrub 10 feet high, may be Zizyphus. Ambrosia psilostachya ? 

 Franseria. Low leguminous ^rub, same as I got at Carbo. Tall and 

 tufted bottle-brush Cereus, Datura, Encelia, low Bouteloua, Jatropha ? 

 Blue Ipomoea, white Altemanthera. Palo verde, a Parkinsonia aculeata, 

 white flowered. Acacia, a low shrub witb flat pods. Buzzards again. 

 I arge O'pxmtia, Lantana ? Vegetation all a little past. Had a rain 

 lately here. Low Cereus. No cactus area like that at Tucson so far, but 

 Cereus scattered in the brush, almost no flat Opuntias, no Helionieri*; 

 today so far. Some flat Euphorbias, Oleander. Populus along creek, 

 Megarrhiza, dates, also Erythea, oranges too. Opuntia Tuna, a narro^v 

 one also with acute tip. Large hill on right with many tall Cereus, also 

 bottle-brush Cereus and flat Opuntia like occidentalis. Sorghum Hala* 

 pense. Oranges starting to turn, no real cultivation of oranges, bamboo, 

 figs, real palo verde, sugar cane. Helianthus annuus, bushes covered with 

 Megarrhiza. Brick-colored Tribulus, devil grass, Baccharis viminea, 

 bamboo in fruit, Aralia cultivated. Xanthiura, Populus Fremonti, Agave 

 with long and blue leaves, very old dates. Now at Hermosillo at foot of 

 high hill. Many buzzards. Asclepias subulata. Fleecy clouds and stratn*; 

 ones, very hot all night, many mosquitoes. The adjoining hill on the 

 south of town is 500 to 1,000 feet high, all marble, being worked for 

 lime now, has been worked considerably in the past. It rises in mas^iv 

 cliffs, but has no ferns. Hermosillo has about the same aridity as Vic- 

 torvillc, California, or a little less. It is watered by the Sonora river, 

 whose bed is % miles west and is half filled v?ith very shallow water. 

 5and everywhere else, banks very low. Parkinsonia aculeata grows culti- 

 vated along the banks of ditches, is rarely 30 feet high, apple-trec-shape.l 

 There is anoflicr species of the same genus, a tall tree, 75 feet high and 

 very slender and straight, cultivated in the streets and parks. There is a 

 big tree. 50 to 60 feet high, with gray bark, fissured lightly in linear 

 areas and h?i5 the fie habit, and with large buttresses at "base and leaves 

 of Aesculus, 5-6-palmate, it is a Ceiba probably, forms a fine shade, 

 cultivated. In crevice^s of rocks on the mountain is a little Mamillaria 

 ^^th linear-clavate red fruit about an "inch long, and with one central 

 Mack and crooked spine that resembled M. phellosperma. There is a large 

 and shrubby Opuntia like leptocaiilis (which I 'have so Tar called frut- 

 e-cens) that seems to grade into our California leptocaulis, and is rather 

 common from Magdalena south. There is a flat Opuntia with long and 

 ^vhite primary spines and yellow secondaries, like occidentalis, but rounder 

 in outline. They also grow Tiere u narrow Tuna. 'The Titayia Cereus 



