APETALOUS EXOGENOUS PLANTS. 461 



leaves ascending, rhombic-ovate, acute at tlie base, toothed, 

 the upper ones lanceolate and entire, more or less coated 

 with a white powder; spikes panicled, the small clusters 

 scattered or crowded, nearly leafless ; seed inclosed in the 

 5-angled calyx, acute on the margins, smooth and shining. 

 — Varies (0. viride, L.) with nearly entire and less mealy 

 leaves, and the larger clusters more scattered. Cultivated 

 grounds. July-September. Stem 2°-6° high j ^je^/o/^5 

 long and slender. 



C. MURALE, L. Stem ascending, branched ; leaves long- 

 petioled, ovate-rhombic, acute, unequally and sharply 

 toothed, bright green on both sides; spikes slender, spread- 

 ing, corymbose, scarcely exceeding the leaves; seed not 

 shining, acute on the margins, nearly inclosed in the 

 slightly angled calyx. Waste places. Stem 6-18' high. 



C. BoTRYS, L. Stem erect, branched; leaves oblong, 

 somewhat pinnatifid-lobed, with the lobes obtuse and glan- 

 dular-pubescent, the upper ones minute ; racemes numer- 

 ous, axillary, spreading, cymose ; seeds with rounded mar- 

 gins, not wholly included in the open and even calyx. 

 Waste places. Stem 6-12' high. 



C. SUBSPICALUM. Diffuse and much branched, clothed 

 with furfuraceous scales ; leaves petiolate, broadly rhombic- 

 ovate, with one or two coarse teeth on each side. (Neither 

 flower nor fruit described.)-- Torrey (Marcy's Expedi- 

 tion). 



** Perennial. 



C. ANTHELMiNTicuM, L. (Wormseed.) Stem stout, 

 erect, branching ; leaves oblong or lanceolate, acute at each 

 end, sharply toothed ; fioioers in narrow panicles termi- 

 nating the branches ; seeds Avith obtuse margins, smooth 

 and shining, included in the even calyx. Waste grounds. 

 Stem 2°-3° high. 



