134 POLYGONEJE. 



short pedicels : margin of sepals often rose-tinted : stamens 5 — 8 : 

 achene smooth and shining, exceeding the sepals. — In the higher Sierra, 

 from near Yosemite northward. Jnly — Oct. 



6. P. Kellogrgii. Erect, slender, simple or with a few widely divergent 

 branches from the base, 1 — 3 in. high, the internodes very short, scarcely 

 equalling the lobes of the sheaths, the whole plant glabrous : leaves 

 linear, acute, I4 — '^4, in. long, almost divaricately spreading, never imbri- 

 cated, not much smaller at the summits of the branches than below, all 

 the axils fioriferous : fi. several at each node, subsessile, pj line long, 

 greenish : achene 1.3 line long, light brown, smooth or obscurely striate, 

 the face rhombic-ovate. — Common in the Donner Lake region of the 

 Sierra ; near P irnbncai.urii, but with spreading and equal leaves, no 

 distinct inflorescence, the achenes light chestnut-brown. It is in the 

 State Survey collection under n. 6005. Aug.— Oct. 



■!-+++ Upper nodes approximated and more flonferous, llieir leaves reduced 



and bract-like. 



7. P. raiiiosissimnm, Michx. Fl. i. 237 (1803). Erect or ascending, 

 2 — 4 ft. high, branching from the middle ; herbage glabrous and of a 

 yellowish green : leaves lanceolate or linear, 1 — 2V2 in. long, acute, 

 attenuate to a slender base ; sheaths scarious and loose, becoming 

 lacerate to the base : fl. 1}^ lines long, yellowish, drooping on the 

 slender pedicel : achene smooth and shining. — Said to occur in the lower 

 Sierra ; not known near the seaboard. 



8. P. Douglasii, Greene, Bull. Calif. Acad. i. 125 (1885) : P. tenue, 

 Wats, not Michx. Erect, slender, sparingly branched above the base, 

 1 — 1^{ ft. high, glabrous, or somewhat scabrous at the nodes : leaves 

 thinnish, oblong to lanceolate, 1-nerved, with or without a few veinlets 

 diverging from the midvein, the margin smooth, often somewhat revolute: 

 stipules hyaline throughout, the sheathing portion short or wanting, the 

 limb more or less lacerate : fl. 1 or nlore in each upper axil, on short 

 deflexed pedicels : serials l^-g — 2 lines long, tipped with white or rose- 

 color : achene black and shining. Var. latifolium, Greene, 1. c. Lower, 

 often flexuous, the leaves broader and shorter : fl. commonly more 

 spicate-congested at the ends of the few branches : achenes broader. — 

 Common in the mountains at middle elevations, almost throughout the 

 State ; long confounded with the eastern P. tenue. July—Oct. 



9. P. coarctatuiii, Dougl. in Hook. El. ii. 133 (181:0). Much like the 

 last, but more freely branching, often diffuse, the herbage more or less 

 scabro-puberulent throiighout : leaves firmer in texture, acute : fl. more 

 spicate-crowded and on erect pedicels : sepals larger, rose-color or white 

 with only a broad midvein of green : achenes very minutely punctate 

 toward the apex.— Of more northerly distribution than the last, but 

 plentiful as far south as the Petrified Forest in Sonoma Co. July— Sept. 



