OF ARTS AND SCIENCES. 201 



palece, Bentliam's D. anthemidi folia of Lower California is said to have 

 about 20. The following I had at first taken for a variety of D. poro- 

 phyUoides Gray, PI. Thurb. 



Dysodia Cooperi. Scabro-puberulum ; foliis (caulinis ignotis) 

 ramealibus lanceolatis crassiusculis sessilibus inciso-dentatis basim 

 versus utrinque in segmentum lanceolato-subulatum stipula^forme par 

 titis, superioribus in bracteas subulatas dimiuutis ; capitulo pollicari 

 bracteis calyculiformibus numerosis in squamas involucri lineari-sub- 

 ulatas sensim acumiuatas transeuntibus ; ligulis " purpureis " lineari- 

 oblongis breviter exsertis ; acheniis puberulo-hirtellis, pappi paleis 

 circiter 9-setosis. — South-eastern borders of California, on the eastern 

 side of Providence Mountains, Dr. J. G. Cooper. 



Helenium Linn. I cannot at all accept the idea that Amhii/olepis 

 DC. belongs to this genus. The habit of the plant, the clasping leaves 

 wholly destitute of impressed punctures (and with somewhat the odor of 

 Melilotus in drying), the long bristly hairs, and the peduncules nodding 

 before anthesis in a Cichoriaceous fashion, are too peculiar : so is the 

 abrupt change from the foliaceous outer series of involucral scales to 

 inner scarious ones, as hyaline as the paleaa of the pappus, and hardly 

 larger. Then the disk-corollas, instead of the very short tube and 

 cylindraceous limb with very short and blunt glandular teeth of 

 Helenium, have a slender tube and a cyathiform or funnel-form 

 5-cleft limb; the lobes deltoid-lanceolate, acute, and glabrous. The 

 achenia with 10 very thick ribs are somewhat peculiar. But the rays 

 with lieule destitute of tube are as in Helenium. The tube to the disk- 

 corolla is well developed in two anomalous Helenia, H. Hoopesii and the 

 Adinea integrifolia HBK., which Bentham associates with it. Per- 

 haps it would not be amiss to restore the genus Oxylepis for these. 



Leptopoda Nutt. is well united to Helenium. But the union clearly 

 carries with it Hecuhcea, i.e. DeCandolle's HecubcBa, whatever that 

 of Bentham (or Bourgeau's plant) may be. My reference of Ghies- 

 breght's plant (in Proc. Am. Acad. 7, p. 359) to Hecuhma DC. 

 was based on a comparison with an imperfect original specimen ; 

 and I am still disposed to think that the species are not distinct. 

 However this be, it may be affirmed of both that the characters — 

 "involucrum late turbinatum, bracteis . . . basi connatis : recepta- 

 culum elevato-conicum," and " receptaculo valde elevato " — do not 

 apply. The receptacle, however, is not " planiusculum," as De Can- 

 dolle describes it, but in Ghiesbreght's plant rather more than hemis- 

 pherical. The rays in the latter sometimes possess and sometimes 

 want the style. I doubt if they are truly fertile in either. 

 VOL. I. 26 



