[From the BuLLETIN oF THE TorREY BoTanicaL Cup, 33: 137-161. 1906.] * 
Studies on the Rocky Mountain flora— XVI 
Per AXEL RYDBERG 
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 leptophyllum oblongifolium S. Wats. Proc. Am. Acad. 
9:95. 1873. 
Atriplex subspicata (Nutt.) Rydb. 
Chenopodium subspicatum Nutt. Gen. Am. 1: I99. 1818. 
Atriplex patula subspicata S. Wats. Proc. Am. Acad. g: 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 
T.5mm., 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. occidentalis, but is characterized by 
its fleshy tuber-like rootstocks and its precocious fruiting. 
CoLorapo: Grayback mining camps, 1900, Rydberg & Vree- 
land 6328 (type); Bob Creek, La Plata Mountains, 1898, Baker, 
Earle & T; racy 270. 
Paronychia brevicuspis (A. Nels.) Rydb. 
Paronychia sessiliflora brevicuspis A. Nels. Bull. Torrey Club 26: 
237- 1899. 
157 
