356 



POLYGON ACE AE (BUCKWHEAT FAMILY) 



697. K. 



mexicanus. 



Fruiting' 

 calyx X 1%. 



696. 11. pallidus. 

 Leaf X 1/3. 

 Fruiting calyces x 1%, 



mm. long, the tips but slightly exceeding the conspicuous 

 whitish ovoid or lance-ellipsoid large grains; achene.s 2-3 

 mm. long. (i?. salicifolius Man. ed. 6, in part, not Wein- 

 manu. ) — Salt m^i'shes, beaches and rocks, coast of N. S. , 

 N. B., and N. E. Fig. 696. 



8. R. mexicanus Meisn. Upright ; leaves linear-lance- 

 olate to narrowly oblong, pale green or glaucous ; panicle 

 very dense, its branches strict or strongly ascending ; pedi- 

 cels shorter than or sometimes exceeding the olive- to 

 ruddy-brown deltoid-ovoid calyx; valves 3.5-6 

 mm. long, the tips much exceeding the narrovply 

 ellipsoid to subulate brown grains; achenes 

 1.7-2.3 mm. long. (R. salicifolius Man. ed. 6, 

 in part, not Weinmann.) — Rich (often brack- 

 ish) soil, Lab. and Nfd. to Assina. and B. C, 

 locally s. to centr. INIe., Mich., and Mo. ; and 

 abundant along the Rocky Mts. to centr. Mex. 

 Fig. 697. 



9. R. altissimus Wood. (PaleD.) Rather 

 tall (1-2 m. high); leaves ovate- or oblong-lanceolate, acute, 



pale, thickish, obscurely veiny (the cau- 

 line, 7-15 cm. long, contracted at base 

 into a short petiole) ; racemes spike-like 

 and panicled, nearly leafless ; whorls 

 crowded ; pedicels nodding, shorter than 

 the fruiting calyx; valves brfiadly ovate 

 or obscurely heart-shaped, obtuse or acut- 

 ish, entire, loosely reticulated, one with a conspicuous grain, 

 the others wMth a thickened midrib or naked. — Alluvial 

 soil, Ct. to Neb., and southw. (Mex.) Fig. 

 608. 



10. R. verticillatus L. (Swamp D.) Rather 

 tall (1-1.6 m. high); leaves lanceolate or oblong- 

 lanceolate, rather obtuse, thickish, pale green, 

 the lowest often heart-shaped at base ; racemes 

 nearly leafless, elongated, loose, the whorls 

 crowded or the lower ones distant ; fruit-bear- 

 ing pedicels slender, club-shaped, abruptly re- 

 flexed, 3-4 times longer than the fruiting 

 calyx; valves dilnted-rhomboid, obtusely some- 

 tchat pointed, strongly rugose-reticidated, each 

 bearing a very large grain. — Wet swamps, 

 w. Que. and Vt. to w. Ont., and souihw. Fig. 

 699. 



11. R. coxglomkrXtus Murr. Smoothish; 

 leaves oblong ; panicle leafy ; pedicels short ; 

 valves obtuse, subentire, all grain-bearing, the 



callosities rclativfdy large and conspicu- 

 ous. — Va. {Curtiss according to Tre- 

 lease) to S. C. ; also Cal. (Adv. from 

 Eu.) 



12. R. oHTCsiP'oLirs L. (Bitter D.) 

 Stem r(jngliisli ; loioest leaves ovate-heart- 

 shaped, obtuse, rather downy on the veins beneath, 

 somewhat wavy-margined, the upper oblong-lanceo- 

 late, acute; v^horls loose and distant; valves ovate- 

 700. ir. obtusifolius. halberd-shaped, vnth some sharp awl-shaped teeth 



Base of leaf x 1/ ^^ base. Strongly reticulated. — Fields, roadside 



Two whorls of infloresence x 1, ditches, etc., very common. (Nat. from.Eu.) Fig. 

 Fruiting calyx x 2^^. 700 



69S. U. altissimus. 

 Leaf X %■ 

 Fruiting calyces x 1% 



699. K. ver 



ticillatus. 



Leaf X 1/3. 

 Fruiting ca- 

 lyces X 1. 



