84 ERYTHEA. 
more virgate inflorescence, and which reaches the eastern 
slope of the Sierra Nevada. The present plant is of a very 
different geographical region; inhabiting the interior of 
California, being common in the gravelly dry beds of streams 
and cafions on the western side of the valley of the Sacra- 
mento, and thence southward, through the Mount Diablo 
Range. 
36. ERIOGONUM SAXATILE, Wats. Proc. Am. Acad. xii. 267; 
Greene, Fl. Fr. 149. On the precipitous northward slope of 
Newton’s Peak, growing among loose rocks with a scant 
argillaceous soil beneath. This handsome species was not 
known until recently from any point north of the Santa 
Lucia Mountains. Mr. Hickman sent it to us, a year or two 
since, from the Salinas region; and this station on Mount 
Hamilton is the northernmost recorded; probably the 
northern limit of the species. 
37. Erioconum nupum, Dougl.; Benth. Trans. Linn. Soc. 
xvii. 413. One of the most common and widely dispersed of 
the Californian species of the genus; found on this mountain 
at all altitudes. 
38. ERIoGoNUM GRACILE, Benth. Bot. Sulph. 46; Greene, 
Fl. Fr. 151. An annual species, common about the Obser- 
vatory; a form rather lower and stouter than usual; the 
flowers mostly dull yellowish with or without a tinge of rose. 
39. OXYTHECA HIRTIFLORA (Gray), Greene, Fl. Fr. 153. 
On the southward slope, under bushes. 
40. CHORIZANTHE MEMBRANACEA, Benth. Trans. Linn. Soc. 
xvii. 419. t. 7. On dry open hillside above Aquarius Springs. 
a 
*AMARANTUS RETROFLEXUS, Linn. Sp. PI. ii. 991. 
42. *AMARANTUS ALBUS, Linn. Sp. Pl. 2 ed. ii. 1404. Both 
these weeds, too familiarly known in many parts of the 
world, are merely gaining a foothold at the summit, as recent 
accidental importations. 
43. *CHENOPODIUM ALBUM, Linn. Sp. Pl. i. 219. 
