id ERYTHEA. 
near of kin to Euthamia, but are shrubby plants, with no 
ligulate corollas. They have entire punctate leaves, also the 
inflorescence of Chrysoma, and substantially the same invol- 
uere, achenes and pappus. I doubt not that they are 
naturally of this genus, and I here so place them. 
3. C€. diffusa. Ericameria diffusa, Benth. Bot. Sulph. 
23 (1844). Solidago diffusa, Gray, Proc. Am. Acad. v. 159 
(1861). Aster Sonoriensis, O. Ktze. 1. ¢. 317 (1891). This 
plant is Mexican, inhabiting the territory adjacent to, and on 
both sides of, the Gulf of California. Its inflorescence is 
rather too flat-topped for a typical Chrysoma, and its ray- 
flowers more numerous, though few. Were it not shrubby, 
its place would be with Euthamia. But the two shrubs next 
following are at almost perfect agreement with the Chrysoma 
type in habit and inflorescence, though in them the proper 
ray-flowers are imperfectly or not at all developed. 
4. (. arborescens. Linosyris arborescens, Gray, Bot. 
Mex. Bound. 79 (1859). Bigelovia arborescens, Gray, Proce. . 
Am. Acad. viii. 640 (1873). Aster arborescens, O. Ktze. 1. ¢. 
315 (1891). Hricameria arborescens, Greene, Man. 175 
(1894). Middle California, at low altitudes in both the 
Coast Range and Sierra Nevada. Achenes shorter and more 
pubescent than in C. pauciflosculosa, but not turbinate. 
5. C. Parishii. Bigelovia Parishii, Greene, Bull. Torr. 
Club, ix. 62 (1882); Gray, Syn. Fl. 141 (1886). Aster 
Parishii, O. Ktze. 1. ce. 318. Decidedly glutinous as well as 
punctate, and with ampler foliage than the last, but other- 
wise most near it.—Confined to low mountains of southeastern 
California. 
Into line with the last two fall several rather diminutive 
montane shrubs, some with radiate, others with discoid 
heads, namely: 
6. C. nana. Hricameria nana, Nutt., Trans. Am. Phil. 
Soc. vii. 319 (1840). Aplopappus nanus, D. 0. Eaton, Bot. 
King Exp. 159. Gray, Syn. Fl. 134, excl. var. cervinus. Like 
