OATALOaUE. 183 



corollas obconic ; branches of tlie style truncate and penicillate. — Carson 

 City, (Anderson, 229 !) In the very hirsute receptacle this plant recedes 

 from the character of Seriphidium, in which section it is placed by Dr. Gray. 

 The filaments are considerably dilated just below the anthers, as if the con- 

 nective were produced below the anther-cells. 



Artemisia discoloe, Dougl. Suifruticose ; stems 1-2° high, glabrous, 

 simple below ; leaves 1-3' long, mostly smooth above, beneath paler and 

 webby tomentose, pinnately lobed with lanceolate pointed entire or sparingly 

 toothed segments, the edges revolute ; heads sub-globose, 1 J-2" broad, dis- 

 posed in an elongated virgate raceme or strict panicle ; involucre at first to- 

 mentose, cup-shaped ; the outer scales ovate ; inner ones oval, with hyaline 

 ciliate-fringed margins ; receptacle smooth ; florets numerous ; a few of the 

 outer ones pistillate, fertile, with very slender corollas, and smooth branches 

 of the style ; the rest perfect, fertile, with funnel-form corollas, and trun- 

 cate penicillate styles. — Subarctic America and the Saskatche,wan, to Ore- 

 gon, California, and New Mexico. East and West Humboldt Mountains, 

 Nevada, and in the Wahsatch .near Parley's Park; 7-9,000 feet altitude; 

 July-September. (638.) 



Artemisia Ludoviciana, Nutt. Saskatchewan to Oregon, California, 

 and Arizona, and eastward as far as Illinois and Michigan, appearing under 

 a great variety of forms. Common throughout Nevada and Utah, but con- 

 fined to the stream-banks and valleys, at 4-6,500 feet elevation ; August- 

 October. The specimens collected illustrate three principal forms, viz : — 



Var. DouGLASiANA. (A. Douglasiana, T. 8^ G.) White-tomentose 

 throughout ; leaves long-lanceolate, acute, entire ; panicle ample ; heads 

 rather large. (639.) 



Var. LATIFOLIA, T. & Gr. Tomentose-canescent ; leaves elliptical-lance- 

 olate, rather short ; heads middle-sized. (640.) 



Var, LATiLOBA, Nutt. Leaves mostly pinnatifid or trifid, the lobes and 

 the upper leaves broadly lanceolate ; the upper surface commonly less tom- 

 entose than the lower, or even becoming smooth ; heads middle-sized or 

 rather large. (641.) 



Artemisia biennis, Willd. Northern British America to Ohio, and 

 westward to California; now naturalized about Buffalo, Philadelphia, and 

 Staten Island, N. Y. Common in the mountain cafions of Nevada ; 5-6,000 

 feet elevation ; September. (642.) 



