140, MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
| PLate 57.] 
57- Polygonum Bolanderi Brewer. 
Polygonum Bolanderi Brewer; A. Gray, Proc. Am. Acad. 8: 400 (1872); 5. Watson, 
3ot. Calif. 2:11; Greene, Fl. Francis. 133, Man. Bay Reg. Bot. 40. 
Perennial by a woody root, wiry, 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. 
