448 SUPPLEMENT. 



E. inornatus, var. angUStatus, GRAY, p. 215. Add syn. : E, anfjustatns, Greene, Bull. 

 Calif. Acad. i. 88 : perhaps a distinct species, but appears to connect with var. viscidulus. 



E. Oreganus, GRAY, p. 21 6. On both sides of the Columbia Eiver, up to and beyond the 

 Cascades, Mrs. Barrett, Suksdorf. Truly perennial, forming a stout caudex and strong root, 

 not stoloniferous ; the rosulate tufts appressed to the bare rocks, which it affects 



E. PhiladelphicUS, L., p. 217. In California the rays are commonly paler, not rarely white. 



56. PSILOCAFvPHUS, Nutt. P. 228, add after line 4: Very few or 

 commonly no empty involucral bracts. Species revised as follows : 



* Leaves all (even those subtending the heads) tapering below, and midrib not prominent: herb- 

 age and (small) heads canescent with close wool: fructiferous bracts not over a line long. 



P. tenellus, NUTT. At length much depressed, the woolliness cottony and becoming floccu- 

 lent : leaves spatulate, a quarter or rarely half an inch long : akenes (half-line long) obovate- 

 oblong. Trans. Am. Phil. Soc. n. ser. vii. 341; Torr. & Gray, Fl. ii. 266. California, 

 common in low grounds throughout the western part of the State. 



P. Oreganus, NUTT. 1. c. More erect and silky-lanate : leaves nearly linear, attenuate 

 below, half-inch long: akenes oblong-cyliudraceous. (On p. 228 partly confounded with 

 the preceding.) Along and near the Columbia River, Oregon and Washington Terr., Xut- 

 tall, Howell, Suksdorf, Mrs. Barrett. 



* * Leaves little and those subtending the heads seldom at all narrowed at base; the midrib of 

 the latter (in dried specimens) comparatively strong: herbage and especially the heads loosely 

 floccose-lanate, least so in the first species. 



P. elatior. Erect and caulescent, or at length with branches spreading, 3 to 6 inches high, 

 commonly robust, and with large (3 or 4 lines broad) very leafy-subtended heads, lightly 

 arachnoid-woolly, the wool of the fructiferous bracts shorter and mostly close : leaves lanceo- 

 late- or subspatulate-linear, sometimes an inch long: akenes cyliudraceous. P. Oreganus, 

 Gray, Proc. Am. Acad. viii. 390. P. Oreganus, var. elatior, Gray, Bot. Calif, i. 336, & Svn. 

 Fl. supra, 228. On the Columbia River, from the Willamette to Hood River, E. Hall, 

 Kellogg & Harford, Suksdorf. Also, Boise City, S. W. Idaho, Wilcox, ambiguous between 

 this and the preceding. 



P. brevissimus, NUTT. Dwarf, with solitary or few and very woolly heads : leaves oblong 

 or lanceolate, 2 to 5 lines long, seldom surpassing the developed heads : akenes cylindrical 

 or slightly clavate. Trans. Am. Phil. Soc. vii. 340, excl. syn. ; exceedingly depauperate 

 specimens from the banks of the Columbia River, Nuttall. Also " California," Kel/oyg & 

 Harford, no. 417, less depauperate, half-inch high or more. N. California, in fields on Chico 

 Creek, Gray, 1885, half-inch to two inches high, with large and very woolly terminal head 

 or glomerule of heads ; the akeues a line long ! The scarious beak to the fridltiferous bracts, 

 which Nuttall thought to be wanting in his exiguous specimens, is small and deciduous. 



P. globiferus, NUTT. Branched from the base and spreading or prostrate : leaves linear 

 or narrowly spatulate, becoming glabrate ; uppermost little surpassing the very woolly heads : 

 akenes obovate-oblong, scarcely over half a line in length. Trans. Am. Phil. Soc. 1. c., excl. 

 syn. Coast of California, from Santa Barbara (Nuttall, &c.) to Los Angeles (Kevin) and 

 San Diego, Cleveland. 

 P. CuiLfcfSiS (Micropus yloltiferus, Bertero, DC. Prodr. v. 460, and Bezanilla Chilcnsis, 



Remy in Gay, Fl. Chil. iv. 110, t. 46, f. 1) has somewhat similar akeues, but mainly ovate 



leaves. 



63 '. DIMER^SIA. New genus, to be appended to the Inuloidece, on 

 p. 59 and p. 237: (Name Ai/xep?/?, of two parts or members.) Heads 2-flow- 

 ered, homogamous ; the flowers hermaphrodite ; the involucre of two herbaceous 

 oblong concave bracts, a little united at base, each subtending and almost enclos- 

 ing a flower. Corolla tubular, regular, 5-toothed. Anthers sagittate at base, the 

 narrow auricles little extended. Style-branches narrowly linear, obtuse, not ap- 



