480 ADDITIONS AND CORRECTIONS TO VOL. II. 



smaller : akene oblong-ovate, less than a line long including the very divergent 

 styles. — Proc. Amer. Acad. xiv. 294. 



Near Chico, Mrs. John Bidwell, May, 1878. 



12''. P. Greenei, Watson, 1. c. Eesemhling P. Calif ornkum, with denser and 

 stouter spikes, the bracts ami finely fimbriate stipules 2 lines long : akene oblong- 

 ovate, with very short and stout nearly erect styles. 



Plains of Shasta {Ecv. E. L. Greene, 1876) ; near Chico, Mrs. J. Bidwell, July, 1878. 

 14. P. amphibium, Linn. On Eussian Eiver {V. Rattan); head of King 

 River, Inyo County, Matthews. 



16*. P. Persicaria, Linn. Near Hmuboldt Bay, Rattan. 



17. P. acre, HBK. At Los Angeles, James. 



18. P, Bistorta, Linn. Xear Humljoldt Bay, Rattan. 



Page 17. 5. ERIOGONUM. 



Insert in Key to Species : — 



Pedicels erect or spreading : outer segments much broader above. 



Leaves round-ovate : involucre puberuh^nt. 21. E. Thurberi. 



Leaves oblong-oblanceolate : invohicre glabrous. 21\ E. panduratum. 



Insert after 24. E. Thomasii : — 



Bracts and involucres glabrous : leaves narrowly oblanceolate : seg- 

 ments linear-oblong. 24\ E. gracili.imum. 



Insert after 30. E. Kennedyi : — 



Low, cespitose : leaves long, oblanceolate : bracts none : flowers yellow. 30». E. ochroleucum. 



7. E. compositum, Dougl. Klamath County, Rattan. 



10. E. ursinum, Watson. Butte County, Mrs. J. Bidwell. 



14. E. spergulinum, Gray. Inyo County, Matthews. 



15. E. hirtiflorum, (iray. Sandhills of San Joaquin County, Lemmon. 



2V. E. panduratum. Very slender, branching from the base, sparingly floc- 

 cose-tomentose, glabrous above or the pedicels often very minutely glandular : leave.s 

 thin, tomentose, oblong-oblanceolate, attenuate into a long petiole, the blade J to 

 nearly 1 inch long : bracts short, green and herbaceous : pedicels ascending, 2 to 8 

 lines long : involucres glabrous, turbinate-campanulate, nearly a line long : flowers 

 white or pinkish, half a line long ; outer segments with a reniform terminal lobe and 

 narrow base, the inner narrowly oblong, undulate. 



Collected by /. G. Lemmon; the locality uncertain. 



24*. E. gracillimum. Low and very slender, reddish, floccose-tomentose below, 

 glabrous above, the short stem sparingly leafy : leaves very narrowly oblanceolate, 

 1 inch long including the slender petiole ; bracts herbaceous, linear-spatulate, the 

 upper ones short : pedicels very slender, subsecund, divaricate, | inch long or less : 

 involucre turbinate, glabrous, nearly a line long : flowers yellowish rose-color, very 

 small ; segments nearly equal, linear-oblong, pubescent. 



Mohave Desert, Kern County, Mrs. A. E. Bush, June, 1879. 

 25. E. trichopodum, Torrey. Los Angeles, Nevin. 



30*. E. ochrocephalum. Low, with much branched caudex, densely white- 

 tomentose, the short stems very leafy: leaves oblanceolate, attenuate into a long 

 slender petiole, the whole li to 2 inches long : peduncles 4 or 5 inches tall : invo- 

 lucres capitate, crowded, without bracts or nearly so, turbinate-campanulate, slightly 

 tomentose, 1| or 2 lines long : flowers yellow, glabrous, small (a line long). 



Valleys of Northwestern Nevada (Washoe or Pioop County), J. G. Lemmon. 



