238 Nelson : Nkw Plants from Wyoming 



crowded, oblanccolatc, short-petiolcd or nearly sessile, 3-5 cm. 

 long, 5-10 mm. broad, cinereous with a close stellate pubescence or 

 glabrate : upper stefn leaves ovate or broadly lanceolate, acuminate, 

 sessile by a broad or partly clasping base, sub-glabrous, downward 

 gradually passing into the basal leaves : fruiting raceme constitut- 



y> of the whole length of the stem, naked above, the lower 

 pods in the axils of the upper leaves : flowers yellow, rather small: 

 sepals glabrous or nearly so, ovate : petals obowate, narrowed into 

 a slender claw, nearly twice as long as the sepals : filaments ex- 

 ceeding the sepals, rather stout, anthers small : pod lanceolate, 



8-12 mm. long, finely pubescent, usually flat but occasionally 

 twisted : style rather thick, about i mm. long : pedicels slightly 

 shorter than the pod : seeds 16-20. 



This species may possibly be found in some of the herbaria as 

 one of the forms of the Rocky Mountain aggregate that has been 

 called D. aiirca Vahl. The true D. aiirca, if figures and descrip- 

 tions may be relied upon, has a single stem, corymbosely branched 

 abov^e : D. siirculifcra has several unbranched stems and some short, 

 stolonifcrous shoots. Of the several species recently published by 

 Dr. Greene, only two are closely allied to this, viz. D. Neo-Mcxi- 

 cana (Pittonia, 4 : 18) which is separated by its stellate-pubescent 

 calyx, its glabrous, elliptical pods and its long style and probably 

 other characters that would appear were that before me : D, spcc- 

 tabilis^ which is separated from this b}^its showy flowers and differ- 

 ences of fruit. In some respects, D, Hcrlcriana resembles this but 

 its branching stems and narrow twisted pods make it impossible to 

 unite the two. 



Type specimen no. 5125, La Plata Mines, Medicine Bow Mts., 

 by Mr. Klias Nelson. 



Lesquerella condensata 



Perennial, the several branches of the caudex very short and 

 crowded (in loose, sandy soil more open and sheathed by the dead 

 leaf bases), the whole plant both in flower and fruit forming a 

 small, dense, sub-globose tuft, 3-8 cm. in diameter, finely and 

 densely stellate -pubescent throughout : leaves greatly crowded on 

 the crowns, linear or narrowly oblanceolatc, I— 4 cm. long : in- 

 floresence a short, corymbose raceme, about equaling (rarely ex- 

 ceeding) the leaves : petals broadly spatulate or with an elliptic 

 blade, 6-"] mm. long, about half exceeding the sepals, the claw 

 broad and margined : filaments slender, equaling the sepals, 

 slightly enlarged at base : pod ovate, compressed at summit, 5 



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