122 AMARANTACEAE 



FAMII.Y 3. AMARANTACEAE J. St. Hil. Amaranth Family. 



Stamens with distinct filaments : ovule i in each cavity. 

 Perianth present in all flowers. i. Amaranthus. 



Perianth wanting in the pistillate flowers. 2. 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. retroflexus. 



Spikes drooping : sepals mostly acute. 2. 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 5 : stems prostrate : seeds 1.5-2 mm. long. 4. A. blitoides. 

 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. Amaranthus retroflexus L. Rough Pigweed. (Man. p. 378; L 

 F. y. 1398.) In cult, or waste soil, throughout N. Atn. except the ex- 

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

 PhiIvAdelphia ; Bucks ; Lancaster ; Erie ; Chester ; Allegheny. 



2. Amaranthus hybridus L. SLENDER Pigweed. (Man. p. 378 ; 1. 

 F. f. 1399. ) In waste grounds, range of the precedino; species. Nat. from 

 tropical Am. — /*i?;/7/.y7i'^7« /a .• Northampton ; Bucks; Phil.'\delphia : 

 Erie ; Lancaster ; Chester ; Allegheny. 



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

 Bucks ; Northampton ; Philadelphia ; Lancaster ; Erie ; Frank- 

 lin ; Allegheny. 



3. Amaranthus spinosus L. Spina' Amaranth. (Man. p. 378; I. 

 V. /. J400.) lu waste and cult, soil, Mass. to Pa., Ohio, Kans., Fla. and 

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

 Dauphin ; Delaware. 



4. Amaranthus blitoides S. Wats. Prostrate Amar.\nTH. (Man. 

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

 routes of travel, Mc. 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. — Pennsylva7iia : Northampton ; Chester ; Delaware. 



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

 F.y. 1403.) In waste places, Mass. to N. Y. Adv. from tropical Am. — 

 Pennsylvania : Philadelphia, chiefly on ballast. 



