180 Universifij of Califoriiiu I'lihlications in Butany [Vol.7 



The togiiles are in very sharply defined vertical ranks, as in tliat 

 variety, but tliey are even more acute than in viridulus; and the 

 corn]la-h)l)(s arc exactly intermediate in len<ilh, measuring: 2.1 mm. 



22. Chrysothamnus nauseosus var. junceus (Greene) condj. no v. 



Bigelovia Juiuua (ireciic, Bot. Gaz., vol. (J, p. 18-4, 1881. 

 ClniisoUuimiius junccus Greene, Erytli., vol. 3, p. 113, 1895. 



Shrub strict, fastif»'iately nnich branched, with slender rush-like 

 mostl}' leafless yellowish green branches : leaves linear-flliform : inflor- 

 escence fastigiate-C3^mose : involucre about 10 mm. high, glabrous; 

 bracts acute, 5 in each of the distinct vertical rows : corolla about 

 9 mm. long; tube pubescent but not arachnoid; lobes about 1.5 mm. 

 long, externally beset with long delicate hairs. 



This is a little-known shrub of eastern Arizona. It is described 

 by Greene as "cinereous"; by Gray as "minutely canescent", but 

 the twigs ill the t^'pe have the usual pannose tomentum and all 

 other characters indicate that it belongs to the present group. The 

 pubescence of the corolla-lobes should be distinctive if constant. 



FORMS NOT DEFINITELY PLACED 



The following named species are all very close to Chrysothanimis 

 nauseosus and at least some of them should doubtless be included in 

 that species when taken in its broadest sense. However, they are 

 not sufficiently well known to the writer to justify him in passing 

 upon them at present. 



Chrysothamnus formosus Greene, Pitt., vol. 4, p. 41, 1899. A low 

 white shrub with narrow spreading foliage and wholly glabrous 

 involucres with 6 or 7 bracts in each vertical row. Described from 

 immature plants gathered "in the neighborhood of a mineral spring 

 among the hills a few miles southwest from Grand Junction, Colo- 

 rado." 



Chrysothammis Macounii Greene, Pitt., vol. 5, p. 63, 1902. Said 

 by Dr. Greene to resemble plattensis and like it a low plant with 

 white-t(mientose twigs and very narrow spreading leaves. The type 

 was from near Lytton, British Columbia. 



Chrysothamnus tnoqumnus Greene, I.e., p. 60. Described from 

 imperfect specimens but seemingly a variety of nauseosus, perhaps 

 one of those with glabrous akenes. 



Chrysothamnus turhinatus Rydb., Fl. Rocky Mts., p. 859, 1917 

 (Bif/rlovia turhinata M. E. Jones, Proc. Calif. Acad. Sci., ser. 2, vol. 5, 



