



43 6 



BOTANICAL GAZETTE [june 



2 _^mm i ong( f er tile, yellow: disk- flowers also yellow, numerous, 

 slightly exceeding the pappus, one sinus more deeply cleft than the 

 others: pappus of 10 narrow paleae, united at base and in a single 

 series, obscurely bidentate at apex, the mid-nerve continued from 

 between the teeth as a minutely scabrous seta as long as the palea, 

 the alternate paleae and setae shorter: achene linear subterete, 

 obscurely ciliate-pubescent, 2~3 mm long, as long as the longer setae: 

 stigmas obtuse. 



Tuly's Ranch, Las Vegas, Nevada, May 10, 1905, Goodding 2343. 



This is probably very near to Hymenathemm Thurberi Gray (Proc. Am. 

 Acad. 19:41 and Syn. Fl. 1:358) and it may have to become Dysodia Thurberi. 

 The description of that species is such as to make it difficult to settle the question 

 positively in the absence of the type or of authentic material, but the geographical 

 distribution makes their identity quite improbable. 



Dysodia fusca, n. sp. — Pubescence minute, scurfy-glandular: 



plants low, 1 



ery 



from a woody base; the 



leaves numerous, 



, all 



opposite, crowded (the internodes short), very narrowly linear 

 or nearly all entire, mucronate, with few to several dark oval oil- 

 glands: heads nearly sessile, campanulate-turbinate, 5-8 mm high: 



ery 



j 



X 'J 



with a few subulate accessory b 

 oil glands: ligules oblong, 5-8, about 4 mm long: disk-flowers about 

 as many, very narrow: anthers and stigmas included, the latter 

 truncate, with an obscure apiculation: pappus paleae of both kinds 

 of flowers wholly resolved into unequal scabrous capillary bristles 

 as long as the disk corollas, fuscous and protruding brushlike from 

 the involucre of mature heads: achenes linear, very finely striate, 

 minutely pubescent, subterete, as long as the pappus: receptacle 

 alveolate, naked, or with a few soft scattering hairs. 



Muddy Range, southern Nevada, in a stony wash (three plants), April 10, 



I905 



BOEBERA 



may be allied to the two Mexican perennials mentioned. Those, however, have 

 pedunculate heads and the leaves pinnately divided as is usual in the genus. 

 Only the most liberal interpretation of the genus admits this species, and were it 

 not for the gamophyllous involucre it were better to place it in Pectis, which 1 

 resembles in habit and in the opposite somewhat connate leaves. 







