no CONTRIBUTIONS TO WESTERS BOTANY N'O ts 



Parkinsonfa aculeata.' There is a limestone hill all covered with Cen'us 

 Thurberi bottle-brush, Wislizenia Cardiospermum, Hymenoclea, Encelia 

 cordifolia, very much long-leaved Encelia, ZizypKus, mesquit,^ Olneya, 

 catsdaw. Very dry here. Large Cylindropuntia, Allionia, incamata. 

 Hilan'a mutfca, 16w and very narrow leaved Bouteloua; Jatropha canescens. 



Pesfquiera station. Scattered Leguminosae, Encelia cordifolia very 

 common, catsclaw, Opuntia leptooaulis, long-leaved Encelia, bottle-brush, 

 another low Cereus like maritimus, Cereus Thurberi, Olneya, Prosopis, Phil- 

 bertia linearis, Franseria ambrosioides. Country has been wasjbed with 

 water at least 10 feet deep, Allionia incamatar, Amarantus fimbriatus. 

 Brush now 20 feet high, Capparis, palo verde, Eycium, screw bean, 

 H>'menoclea. River here was % mile wide at flood. Datura Stramonium, 

 Altemanthera languinosa, Zizyphus, bottle-brush, Condalia, catsclaw, 

 screw bean. Mistletoe, Cereus Thurberi becoming rare, also Fouquiena. 

 Much grass Bursera with brown bark, 2 species of Encelia. Opuntia 

 Rigelovii, Cereus raaritimus ? Zizyphus, Cardiospermum, Condalia 15 feet 

 high. Boerhaavia annual, blue Ipomoea, Castor oil plant. No mountains 

 near. Oleander, Nicotiana trigonophylla, Villanova chrysanfliemoides. 



Carbo. Altemanthera lanuginosa and Encelia cordifolia most com- 

 mon now. H}Tnenoclea. Whole valley nearly level, vegetation rather dense 

 and 20 feet high. Mostly Leguminosae, Baccharis, sergilioides, Wislizenia. 

 Populus Fremonti. 



Pozo. Everywhere here the housese are coirapsedl Some canes of 

 Fouquieria splendens on a fence, Baccharis sergiloides, Lyciura, Hymeno- 

 clea in long spikes, PKysalis, flat Euphorbias, big flat Tribulus, Ipomoea 

 pink-blue, medium sized. Mistletoe, Amarantus fimbriatus, Franseria 

 ambosiodes, Cereus giganteus ? Cottea, Bouteloua prostrata, Aristida gra- 

 cilis ? Malva, Setaria gluca. No Larrea, palo verde. Vegetation very 



green. 



Caman. Everything as dry as a chip. 



North from Magdalena, November 24, 1926. Sambucus glauca in 

 Moom, a tree 20 feet hfgh here. Celtis, Mesquit, some trees 40 feet high 

 and 2 feet diameter, Juglans, Populis Fremonto, Hymenoclea, Krameria. 

 Baccharis sergilioides, Salix amygdaloides, Zizyphus, Atriplex canescens, 

 Cotton, 



Nogales, January 23, 1927. Saw Yucca elata ? on the way from 

 Tucaro. It has the habif of Whipplei, but has a trunk 4-6 feet high. 

 Leaves more like those of Y. angustissima but wider. Inflorenscence that 

 of WTiipplei. Flower peduncle 2-4 feet long. 



January 24, 1927. Frost on the ties and car tops at 7 a.m. Barome- 

 ter reads 3,600 feet altitude. The divide south reads 3,900 feet. Nearly 

 all die way south over the divide from Nogales we are among live oaks 

 (a black oak). It fs bright and sunny, but frosty. The first stop i? 

 3,500 feet altitude, where there is a broad meadow and small pond. Saw 

 a camp under a live oak, with a bright fire burning, and a wagon near 

 by. Passed a fruit express train of 14 cars bound north at the summit. 

 Much wood piled high, also many burros grazing. No pinons or junipers, 

 some Celtis occidentairs, Juglaas Califomica with mfstletoe, now adecidu- 



