Studies on the Rocky Mountain flora — XVI 



Per Axel Rydberg 



V 



Salix Watsonii (Bebb) Rydb. 



Salix cordata Watsonii Bebb, Bot. Calif. 2: 86. 1880. 

 Salix flava Rydb. Bull. Torrey Club 28: 273. 1901. Not S. 

 flava Schoepf. 1796. 



/ Chenopodium oblongifolium (S. Wats.) Rydb. 



Chenopodium Lptophyllum oblongifolium S. Wats. Proc. Ai 

 9: 95. 1873. 



■ Atriplex subspicata (Nutt.) Rydb. 



CJicnopodium suhspicatum Nutt. Gen. Am. 1 : 199. 18 18. 

 Atriplex patida subspicata S. Wats. Proc. Am. Acad. 9: 107 



1873. 



Rumex praecox Rydb. sp. nov. 



Perennial with a thick fleshy rootstock ; stem 2-3 dm. high, 

 striate; basal leaves petioled, rather thick; petioles 5-10 cm. 

 long; blades oval or elliptic, 4-10 cm. long, 2-4 cm. wide, 

 rounded at both ends ; stem-leaves similar, but smaller, short- 

 petioled and more acute ; flowers perfect, in terminal and axillary 

 panicles ; perianth-lobes oval, rounded at the apex ; the outer 

 1.5 mm., when fully developed about 3 mm. long, the inner 3-5 

 mm., without tubercles ; fruit developed before the perianth-lobes 

 become much enlarged, shining. 



This species is related to R. occidcntalis, but is characterized b\ 



its fleshy tuber-like rootstocks and its precocious fruiting. 



Colorado: Grayback mining camps, 1900, Rydberg & Vrce* 



land 6328 (type); Bob Creek, La Plata Mountains, 1898, Baker, 

 Earle & Tracy 270. 



^Paronychia brevicuspis (A. Nels.) Rydb. 



Paronychia scssiliflora brevicuspis A. Nels. Bull. Torrey Club 26 



237. 1899. 



137 



