1-il) MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 



[Plate 57.] 

 57. Polygonum Bolanderi Brewer. 



PolDgovnm Bolanderi Brewer; A. Gray, Proc. Am. Acad. 8: 400 (1872); S. Watson, 

 Bot. Calif. 2:11; Greene, Fl. Francis. 133, Man. Bay Reg. Bot. 40. 



Perennial by a woody root, Aviry, glabrous, sufFrutescent below and somewhat woody 

 throughout. Stem often quite stout, clothed with a scaly bark, branched from the base, 

 the branches few or numerous, erect, 2-6 dm. long, nearly simple, wiry, with a dark red 

 shining bark and mostly naked for about half their length ; leaves linear or almost 

 subulate, reduced to bracts on the ultimate divisions of the branches, .3-1.5 cm. long, 

 generally less than 1 mm. broad, acute or cuspidate, with a prominent midrib and two 

 partially developed ribs along the margins, not articulated to the ocreae; ocreae fun- 

 nelform, 5-10 mm. long, conspicuous and imbricated on the branchlets, finely lacerate; 

 inflorescence consisting of short axillary and terminal spikes ; spikes stout, 1-2 cm. long, 

 covered by the imbricated ocreae, bearing one flower at each node; calyx sessile, 2-3.5 

 mm. long, mostly hidden in the ocreae, five-parted to below the middle, each segment 

 whitish or rose-colored with a dark green rib; stamens eight or sometimes nine, in- 

 cluded ; style .4 mm. long, three-parted, apparently formed by the splitting of the apex 

 of the ovary or achene; achene triquetrous, 2.5 mm. long, oblong-ovoid, dark chestnut- 

 colored, smooth and shining. 



Vicinity of Napa and about the eastern base of the Napa mountains, California. 



