314 CALIFORNIA ACADEMY OF SCIENCES. 



and pedicels slender, deflexed, spreading, surpassing the 

 leaves; flowers white or tinged with rose color, fragrant. 



A. turbinata, so well marked by the peculiar fruit, 

 seems to be a variable species. I have specimens from 

 Grand Junction, Colorado, that are distinguished by large 

 conspicuous involucral bracts. 



Collected on the mesa above the San Juan River, be- 

 yond Butler Wash. It was very abundant but only one 

 specimen was collected. 



105. Abronia fragrans Nutt. ex Hook., Kew. Journ., v 

 (1853), 261. 



Type locality: " On loamy, sandy, firm banks, within 

 the high drift-sand hills of the Lower Platte." 



Collected on McElmo Creek, within the canon, where 

 it was abundant. 



106. Cladothrix lanuginosa Nutt., ex Moq. DC, Prod., 

 xiii, 2, 360. 



Type localities: " Salt River and Red River." 

 Collected near the junction of the San Juan River with 



McElmo Creek; also on Barton's Range, beyond 



Epsom Creek. 



107. Cycloloma platyphyllum Moq., Enum. Chenopod., 

 18 (1840). 



First described by Michaux in Fl. Bor. Amer., i, 174, 

 as Salsola ■filatij>hylla (1803). 



Habitat: " In the region of Illinois." 



Collected on the sandy flats of the San Juan River, 

 near Recapture Creek. Entire plant light green instead 

 of purple, as on the plains around Denver. 



108. Chenopodium Fremonti Watson? Bot. King's Ex- 

 ped., 287. 



Collected on McElmo Creek in specimens too young 

 for certainty as to the species. 



