204 Proceedings of the Biological Society of Washington. 



mm. beyond the stamens and about 7 mm. beyond the petals. The tube 

 of the calyx is of the same length as that of 0. rubrinervis , but the 

 sepals are about 6 mm. longer. 



Abbott Ranch, Rito de los Frijoles, New Mexico, growing in a grove of 

 Populus an gusti folia, August, 1912 (C'ockerell). Described from living 

 plant in garden at Boulder, Colorado. Named after Dr. W. L. Hewett, 

 the Director of the Archaeological work at the Rito de los Frijoles. It is 

 evidently close to 0. irrigua Wooton & Standley, but differs from the 

 description, especially as to the pubescence. Mr. Paul C. Standley kindly 

 informs me that it is very different from the typical form of 0. irrigua. 

 It is no doubt an " elementary species," and it may either be placed as 

 a subspecies of 0. hooheri or given a binomial as Oenothera heicetti. 



Sedum cockerelli Britton. 



Last August I collected living plants a few miles from the type locality, 

 and now have them flowering in my garden. The characters " petals 

 white, anthers pink," were given by Doctor Britton from my recollection. 

 It now proves that the anthers are only slightly flecked with pink; it is 

 the styles that are bright pink. The white petals have a transverse pink 

 blotch near the middle. The plant is glabrous but scurfy. Stems light 

 green; stem-leaves narrower at base than beyond, and not very acute. 



Heliotropium xerophilum Cockerell. 



In the new Illustrated Flora and elsewhere H. spathulatum Kydberg is 

 given as a valid species, ranging to Chihuahua. It is, I am confident, 

 H. xerophilum, described the year before. I think it is certain that there 

 is only one species of the H. curassavicum group in New Mexico and 

 Chihuahua. 



