PLANTS FROM SOUTHEASTERN UTAH. 323 



ing upwards; upper branches cymosely panicled; invo- 

 lucres few, sessile and secund near the ends of the branch- 

 lets (the axillary involucre is shortly pedicelled) ; perigo- 

 nium contracted at the throat, forming below, a strongly- 

 ribbed turbinate tube slightly corrugated transversely; 

 divisions orbicular, white, ribbed with rose-color, margin 

 crimped; involucres 3-5 flowered, 2 mm. long, ribs al- 

 most concealed by the tomentum. 



This belongs to § Corymbosi and differs from other 

 members of the group in its well-marked inflorescence. 

 The urn -shaped perigonium allies it most closely to E. 

 hrevicaule, but in its vegetative characters it most closely 

 approaches E. corymbosiim. 



It was collected on the mesa above Butler Spring 

 where it grew in bunches and presented a beautiful ap- 

 pearance, each plant covering the ground for nearly a 

 yard in diameter with its snowy white intricately-tangled 

 stems. 



135. Shepherdia rotundifolia Parry, Am. Nat., ix, 350. 

 Type locality: "On bare clay soil in the upper valley 



of the Virgen." 



This shrub was abundant on the moist benches of the 

 cliffs near Bluff City, and at the head of washes where 

 water remained after a rain. It was collected near Bluff 

 City and near the head of Willow Creek. 



136. Comandra umbellata Nutt., Gen. i, 157. 

 Type locality not given. 



Collected in fruit on Recapture Creek. 



137. Euphorbia flagelliformis Engelmann, Hayd. Bull. 

 Geol. and Geog. Surv., ii, 243. 



Type localities : " On the Rio Grande, near El Paso."* 



* Collected without fruit by Chas. Wright and named E. petaloidea var. 

 flagelliformis Engelmann, Bot. Mex. Bound., 185. 



