480 ADDITIONS AND CORRECTIONS TO VOL. II. 



smaller: akene obloiig-ovate, less tluiu a line long iuchuling the very divergent 

 styles. — Proc. Anier. Acad. xiv. 2U4. 

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



12^ P. Greenei, Watson, 1. c. Resembling P. Callfomicum, with denser and 

 stouter spikes, tlie l»iaets 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. Bidwcll, July, 1878. 



14. P. amphibium, Linn. On Ilussian River (V. liattan) ; head of King 

 River, Inyo County, Matthews. 



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



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



18. P. Bistorta, Linn. N(!ar Humboldt Ray, Rattan. 



Page 17. 5. ERIOGONUM. 



Insert in Key to S]iecies : — 



Pedicels erect or si)reacling : outer segments nuicli broader above. 



Leaves round-ovate : involucre puberuhMit. 21. E. TirURnKUl. 



Leaves oblong-oblanceolate : involucre glabrous. 21*. E. pandukatum. 



Insert after 24. E. Thomasii : — 



Bracts and involucres glabrous : leaves narrowly oblanceolate : seg- 

 ments linear-oblong. 24'. E. GltAClLI,IML-M. 



Insert after 30. E. Kenneoyi : — 



Low, cespitose : leaves long, oblanceolate : bracts none: flowers yellow. 30*. E. OCIIUOLEUCUM. 



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

 10. E. ursinum, ^Vatson. Ibitte County, Mrs. J. Bkhve.ll. 

 14. E. spergulinum, (iray. luyo County, Matthews. 

 1;"). E. hirtiflorum, (Jray. Sandhills of Sau Joaijuin Clounty, Lemmun. 

 21^ E. panduratum. Very slender, branching from the ])ase, sparingly iloc- 

 cose-tomentose, gl.ibnnis aljove or the pedicels often very minutely glandular : leaves 

 thin, tomentose, oblong-oblanceolate, attenuate into a huig petiole, the blade i to 

 nearly 1 inch long : bracts short, green and herbaceous : i)e<licels ascending, 2 to 8 

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

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

 narrow base, the inner narrowly oblong, undulate. 

 Collected by J. (!. Lciiniiint ; the locality uncertain. 



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

 glabrous above, the short stem sparingly leafy : leaves very nanowly olilanceolate, 

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

 up))er ones short : pedicels very slender, subs(!cund, divaricate, ), inch long or loss : 

 involucre turbinate^ glabrous, nearly a line long : llowers yellowish rose-c(jlor, very 

 small; segments nearly etpial, linear-oblong, jjubcscent. 



Mohave Desert, Kern County, .!//;>. A. E. Bush, June, 1879. 

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



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

 toiuentose, tlie short steins very leafy : leaves oblanceolate, attenuate into a long 

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

 lucres capitate, crowiled, without bracts or nearly so, turbinate-canipanulate, slightly 

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



Valleys of Northwestern Nevada (Waslioc or Hoop County), J. G. Leinmon. 



