22 [Feb. 



D. *p;racilift. Biennial, erect; stem pilose, branching above, the 1-flowered 

 slender branchlets forniing a fastigiate corymb; lower leaves pilose, pinnatifid ; 

 the segments oblong obtuse, upper leaves linear, simple and sessile, entire, or 

 minutely toothed, strongly ciliated with slender white bristles, which terminate 

 al! the lobes of the leaves; involucrum not viscid. 



Hab. Santa Fu, ^Nevv Mexico.) Flowering in August. 



MICROPUS. 

 M. ^heterophyllus. Annual, erect, simple, slender; densely lannginous 

 above, tomentose below; leaves below linear acute, above lanceolate, obtuse and 

 sessile; capituli lateral and terminal, more densely lannginous; discal florets 

 about ^, masculine 3 to 5. 



IIab. Santa Barbara, Upper California. Very nearly allied to M. augusti- 

 fdJiiix, but the heads appear larger and more woolly, and the upper leaves are 

 difTerent. 



POLYPAPPUS. 



P. *.iericciis. Shrubby; younger branches and leaves sericeous ; branches 

 very leafy, ending in small corymbose clusters of flowers; leaves Jance- 

 linear, l-ncrvcd, eiitire, acute, at length nearly smooth ; achenia smooth. 



Hab. In Upper California, towards the Rocky Mountains. 



BULBOSTYLIS. 



§ * PsATiiYROTus. t Anuual, and dichotomously branched ; involucrum of a 

 nearly single series of loosely imbricated, slightly striated scales ; pappus short 

 and scabrous, shorter than the florets; style not bulbous; achenia turbinate, 

 densely villous. 



B. *annun. Very dwarf and dichotomously branched, clothed everywhere 

 with greenish furfuraceous scales, and somewhat viscid; leaves cuneate-obovate, 

 toothed at the apex; flowers nearly sessile, crowded into an irregular corymb. 



Hab. Rocky Mountains, near Santa Fe. 



QUERCUS. 



Q. GaniheUi. Leaves obovate, shortly petiolate, narrowed below, sinuately 

 lobed, dilated and somewhat 3-lobed at the summit, beneath pubescent, 

 the lobes rather obtuse, the upper ones subdentate; fruit sessile, small, the cup 

 hemisplierical, scales ovate-acute; the glande ovate and acute, about half im- 

 mersed in the cup; the conic summit short. 



Hai5. On the banks of the Rio del Norte, but not abundant. With the aspect 

 of our northern oaks, but very distinct; in the leaf approaching a little to L. oh- 

 tusiloba, but without any near affinity. 



OROBANCIIE. 



0. *multiJlora. Pubescent ; branching from the base ; flowers subimbri- 

 cated, scales lanceolate-acute; peduncles very short; flowers purplish, re- 

 curved; calyx deeply ."j-cleft, bibracteate at base; segments long and linear ; 

 anthers tufted with hairs. 



Hab. Sandy ground along the borders of the Rio del Norte. Flowering in 

 September. 



t In reference to the extreme fragility of the branches. 



