444 ADDITIONS AND CORRECTIONS TO VOL. I. 



Page 174. 9. CERCOCARPUS. 



2. C. parvifolius, Nutt. Butte County, Mrs. Austin. 



Page 178. 14. POTENTILLA. 



3. P. Breweri, Watson. Peaks of Webber, Sierra County (Lemmon) ; nearly 

 glabrous, with dilated stipules and large calycine bracts nearly equalling the petals. 



7. P. Wheeleri, Watson. Eothrock, Bot. Wheeler's Expl. 360, t. 3, B. San 

 Bernardino Mountains, Parry. 



8. P. G-rayi, Watson. P. Clarkiana, Kellogg, Proc. Calif. Acad. vii. 94. 

 Evidently a reduced form. 



12. P. palustris, Scop. Butte County (Mrs. J. Eidwelf) ; Plumas County, 

 Mrs. Austin. " Sterns 5 or 6 feet long, floating." 



Page 181. 16. HORKELIA. 



4. H. congesta, Hook. Plains of Shasta Eiver, abundant, Rev. E. L. Greene. 

 Leaflets cuneato-obovate in outline, deeply cleft into 3 to 5 linear lobes. 



5. H. tenuiloba, Gray. Mohave Eiver, E. Palmer. 



7. H. purpurascens, Watson. Eothrock, Bot. Wheeler's Expl. 360, t. 3, A. 



Page 182. 17. IVESIA. 



Stamens 5 to 20. 



2. I. unguiculata, Gray. Bear Valley, Mohave slope of the San Bernardino 

 Mountains, Parr// &, Lemmou, n. 104. Hairs at the base more spreading : petals 

 with a spatulate blade. 



Page 185. 19. ALCHEMILLA. 



1. A. arvensis, Scop. Flowers fascicled in the sheaths opposite to the petioles. 

 Heterocodon minimum, Kellogg, Proc. Calif. Acad. vii. 111. 



Page 187. 23. ROSA. 



2 a . R. spithamea. A span high or less ; stem glabrous ; spines usually one or 

 two pairs at the base of the upper leaves, slender, nearly straight : leaves few ; stip- 

 ules very narrow, acuminate, glaridular-ciliate ; leaflets 3 to 7, thin, narrowly ellip- 

 tic to obovate. obtuse or acutish, serrate and glandular-serrulate, an inch long or 

 less, the short petiolule and rhachis glandular-pubescent and the latter sparingly 

 spinulose : flowers corymbose (4 to 6), on somewhat glandular pedicels, 1 to 1 

 inches broad ; calyx-tube globose-oblong, densely glandular-hirsute. 



On the Trinity River, very abundant in open woods, "never more than a foot high," V. Rattan, 

 July, 1878. Allied to R. parvifolia, Ehrh., of the Atlantic States ; differing especially in the 

 thinner spinulose-serrulate leaflets. 



3 a . R. Nutkana, Presl. The species referred to as R. blanda, Ait. (?). 

 Page 188. 24. HETEROMELES. 



1. H. arbutifolia, Eoem. Butte County, Mrs. Austin. 



Page 190. 27*. PERAPHYLLUM, Nutt. 



Flowers solitary or in sessile 2 3-flowered corymbs ; petals orbicular, spreading : 

 ovary usually 2- (incompletely 4-) celled ; styles 2. Otherwise as Amelanchier. 



