VOL. II.] Plants of San Francisco. 371 



& 



409. Polygonum Muhlenbergii Wats. Margin of Mountain 

 Lake. May — October. 



410. Polygonnm Persicaria L. spec, ed, i, 364. Waste places 

 and ditch sides, between Black Point and the Presidio. June 

 October, * ' Lady' s Thumb. ' ' 



411. Polygonum Pennsylvanicum^ L. spec, i, 549. Low 



places in the northern part of the city. June — September. 



412. Polygomim acre HBK. Nov. Gen. ii, 179. About the Presi- 

 dio, Mountain Lake, Lake Merced. South San Francisco. June — • 

 September. '* Water Smartweed.*' 



413. Polygomim Convolvuhis L. spec, i, 522. Becoming com- 

 mon about the Presidio roads, and in the western part of the city. 

 June — September. ** Black Bindweed.'' 



414. Eriogonum latifolium. Sm. in Rees Cyc. Common in 

 the western part of the city, blooming the greater part of the year. 

 A form on the Potrero and South San Francisco hills, connects with 

 E, 7Uidtim. 



415. Eriogonum fasciculatum Benth. Trans. Linn. Soc. xvii, 

 41 1- Near the entrance to Black Point. August — December. 

 *' Wild Buckwheat/' 



416. Chorizanthe pungens Benth. Trans. Linn. Soc. xvii, 

 419, t. 19. Common in the sandy outskirts of the city. May 



July. 



417. Pterostegia drymarioides F. & M. Ind. Sem. Hort. 

 Petr. ii, 23. Common in rocky and bushy places. March— June. 



amarantace^. 



418. Amarantus albus L. spec. 1409. Near the Presidio and 

 at Islais Creek. May — August. ** Tumble Weed." 



419. Aviarayilus reirojlexus l.^ spec. 1407. Common in waste 

 places. June — September. ** Pigweed.*' 



CHENOPODIACE^. 



i * 



420. Clmiopodium album L. spec. 119. Common, blooming 

 the greater part of the year. ** Lamb's-Quarters." 



van viride (L.) Common, 



*The greater number of the species of Polygonum here enumerated are, with us, 

 unquestionably introduced. 



