122 AMARANTACEAE 



Family 3. AMAKANTACEAE J. St. Hil. Amaranth Famii,y. 



Stamens with distinct filaments : ovule i in each cavity. 

 Perianth present in all flowers. i. Amaranthps. 



Perianth wanting in the pistillate flowers. i. Acnida. 



Stamens with partially united filaments : ovules 2-8 in each cavity. 



3. Celosia. 

 1. AMARANTHUS L. 

 Utricle circumscissile. 

 Flowers, at least the upper ones, in dense terminal spikes. 

 Stems unarmed, without spines at the leaf-axils. 

 Spikes strict : sepals mostly obtuse. i. A. relroflexus. 



Spikes drooping: sepals mostly acute. i. A. hybridus. 



Stems furnished with a pair of spines at each leaf -axil. 3. A. spinosus. 

 Flowers in small axillary clusters usually surpassed by the leaves. 

 Sepals 4 or systems prostrate : seeds 1.5-2 mm. long. 4. A. blUoides. 

 Sepals 3: stems erect: seeds about i mm. long. 5. A. albus. 



Utricle indehiscent. 

 Flowers, at least the upper ones, in continuous or interrupted spikes. 



6. A. lividus. 

 Flowers in axillary clusters surpassed by the leaves. 7. A.pumilus. 



1. Amaranthua retroflexus L- Rough Pigweed. (Man. p. 378; 1. 

 F. y! ^39^-) In cult, or waste soil, throughout N. Am. except the ex- 

 treme north. Also in Eu. Nat. from tropical Am. — Pennsylvania : 

 Philadei,phia ; Bucks ; Lancaster ; Erie ; Chester ; Ahegheny. 



2. Amaranthus hybridus L. Sl,ENDER PiGWEED. (Man. p. 378 ; I. 

 F. y. /J99. ) In waste grounds, range of the preceding species. Nat. from 

 tropical Am. — Pennsylvania : Northampton ; Bucks ; Phii,adelphia ; 

 Erie ; Lancaster ; Chester ; Ai<i,egheny. 



2a. A. hybridus paniculatus (L.) Uline & Bray. (Man. p. 378.) — 

 Bucks ; Northampton ; Phii,adei,phia ; Lancaster ; Erie ; Frank- 

 lin ; Allegheny. 



3. Amaranthus spinosus L. S?iny Amaranth. (Man. p. 378 ; I. 

 F. f. 1400.) In waste and cult, soil, Mass. to Pa., Ohio, Kans., Fla. and 

 Mex. Nat. from tropical Am. — Pennsylvania: Bucks; Lancaster; 

 Dauphin ; Delaware. 



4. Amaranthus blitoldes S. Wats. Prostrate Amaranth. (Man. 

 p. 378; I. F. /. 1401.) In waste places, especially along the principal 

 routes of travel, Me. to Minn., N. J., Mo. and Kans. Nat. from west of 

 the Rocky Mts. — Pennsylvania: Philadelphia, ballast ; Bucks; Alle- 

 gheny. 



5. Amaranthus albus L. Tumble weed. (Man. p. 378 ; I. F. /. 

 1402.) In waste or cult, soil throughout N. Am. Nat. from tropical 

 Am. — Pennsylvania . Northampton ; Chester ; Delaware. 



6. Amaranthus lividus L. Purplish Amaranth. (Man. p. 379; I. 

 F./. 1405.) In waste places, Mass. to N. Y. Adv. from tropical Am.— 

 Pennsylvania : Philadelphia, chiefly on ballast. 



