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 b . P. Greenei, Watson, 1. c. Resembling P. Calif omicum, with denser and 

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

 ovate, with very short and stout nearly erect styles. 



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



14. P. amphibium, Linn. On Eussian River (F. Rattan); head of King 

 River, Inyo County, Matthews. 



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



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



18. P. Bistorta, Linn. Near Humboldt Bay, Rattan. 



17. 5. ERIOGONUM. 



Insert in Key to Species : 



Pedicels erect or spreading : outer segments much broader above. 



Leaves round-ovate : involucre puberulent. 21. E. THTTRBERI. 



Leaves oblong-oblanceolate : involucre glabrous. 21". E. PANDURATUM. 



Insert after 24. E. THOMASII : 



Bracts and involucres glabrous : leaves narrowly oblanceolate : seg- 

 ments linear-oblong. 24*. E. GRACILLIMUM. 



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, Gray. Sandhills of San Joaquin County, Lemmon. 



21*. E. panduratum. Very slender, branching from the base, sparingly floc- 

 cose-tomentose, glabrous above or the pedicels often very minutely glandular : leaves 

 thin, tomeutose, oblong-oblanceolate, attenuate into a long petiole, the blade | 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 reniforni terminal lobe and 

 narrow base, the inner narrowly oblong, undulate. 



Collected by J. 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, 

 ^ 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. trichopoduni, 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 H to 2 inches long : peduncles 4 or 5 inches tall : invo- 

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

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



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



