238 



Chenopodium album. Lamb's-quarters. Abundant in waste 

 places. 



Salsola Kali tenuifolia. Russian Thistle. Abundant in salty 

 soil, and becoming equally abundant along the roadsides and 

 in waste places. 



Amaranthus retroflexus. Green Amaranth. Common in culti- 

 vated fields. 



Saponaria Vaccaria. Corn Cockle. Not uncommon in fields 

 and waste places. 



Cerastiuni brachypodum. Mouse-ear Chickweed. Occasionally 

 occurring in lawns. 



Portulaca oleracea. Purslane. Found occasionally in cultivated 

 fields. 



Ranunculus arvensis. Field Crowfoot. Found in one of the 

 canyons by the writer, where it is apparently well established. 



Fumaria officinalis. Fumitory. Well established along railroad 

 tracks and adjacent roads in some places. 



Brassica nigra. Black Mustard. Abundant along roadsides 

 and in waste places. 



Brassica Rapa. Turnip. Not uncommon along roadsides. 



Lepidinm Draba. Hoary Cress. Scarcely known ten years ago, 

 but now becoming abundant. 



Lepidium perfoliatum. Also becoming abundant. The writer 

 observed this species for the first time about five years ago. 

 So far as I know, this species has not been reported as occurring 

 elsewhere in the United States. 



Conringia orientalis. Hare's-ear Mustard. Occurring occa- 

 sionally in waste places in the towns. 



Sisymbrium officinale. Hedge Mustard. Common in neglected 

 yards. 



Sisymbrium altissimum. Tumbling Mustard. Another weed, 

 now everywhere, that was unknown ten years ago. On ac- 

 count of its tumbling habit, it spreads very rapidly, and is 

 likely to become as great a nuisance as the Russian Thistle. 



Sophia Sophia. Herb-Sophia. Abundant in West Salt Lake in 

 waste grounds. 



Capsella Bursa-pastoris. Shepherd's Purse. This cosmopolitan 

 weed is abundant everywhere. 



