AMARANTHACEAE. 



Vol. II. 



I. Acnida cannabina L. Salt-marsh Water- 

 hemp. Fig. 1670. 



Acnida cannabina L. Sp. PI. 1027. 1753. 



A. rusocarpa Michx. Fl. Bor. Am. 2 : 234, pi, 50. 1803. 



Succulent, stem stout or slender (sometimes i' in 

 diameter at the base), usually much branched, I°-I0° 

 tall, the branches ascending. Leaves lanceolate, acumi- 

 nate but generally blunt-pointed and apiculate at the 

 apex, 2'-6' long, i'-ii' wide, narrowed at the base, 

 entire or slightly undulate; petiole usually shorter than 

 the blade; staminate spikes I'-s' long, usually dense; 

 sepals oblong-lanceolate or ovate-oblong, acute, acumi- 

 nate or obtusish, cuspidate or mucronate; fertile spikes 

 dense or loose; stigmas slender, papillose-hispid, 4" 

 long; utricle fleshy, indehiscent, 3-5-angled, subglobose 

 or obovoid, l"-2" long when mature, becoming black, 

 much longer than the bracts. 



In salt and brackish marshes, and up the rivers to fresh 



water. New Hampshire to Florida. Water-leaf. July-Aug. 



Acnida floridana S. Wats. Proc. Am. Acad. 10: 376, a more slender plant, of the southern 



Atlantic coast, with narrower slender-petioled leaves, the flowers in elongated interrupted spikes, 



and a smaller utricle, may occur in southern Virginia. 



2. Acnida tamariscina (Nutt.) Wood. Western 

 Water-hemp. Fig. 1671. 



Amarantus tamariscinus Nutt. Trans. Am. Phil. Soc. (II.) 



5: 165. 1833-37. 

 Acnida tamariscina Wood, Bot. & FI. 289. 1873. 



Similar to the preceding species, much branched, 

 erect, the branches usually slender, erect-ascending. 

 Leaves lanceolate or ovate-lanceolate, 2'-6' long, mostly 

 long-acuminate, but sometimes obtuse at the apex and 

 mucronate or cuspidate-tipped, narrowed at the base, 

 the petioles commonly shorter than the blades ; spikes 

 mostly loose or interrupted, often s' long; sepals lance- 

 olate, subulate-acuminate ; stigmas plumose, rather 

 short; utricle membranous, not angled, i"-i" long, cir- 

 cumscissile; bractlets lanceolate, cuspidate. 



In swamps, Illinois to South Dakota, Texas and New 

 Mexico. July-Sept. 



Acnida tuberculata 



Water-hemp. 



Moq. Rough-fruited 

 Fig. 1672. 



A, tuberculata Moq. in DC. Prodr. 13^: 278. 1849. 



A. tamariscina subnuda S. Wats, in A. Gray, Man. Ed. 6, 



429. 1890. 

 A. tamariscina concatenata Uline & Bray Bot. Gaz. 20' 



158. 1895. 

 A. tamariscina prostrata Uline & Bray, Bot. Gaz. 20 : 



158. 1895- 



Erect ascending or prostrate, sometimes 10° high, 

 the branches flexuous. Leaves lanceolate to rhombic- 

 spatulate, acute or obtuse, 6' long or less ; inflores- 

 cence spicate, or glomerate in the axils; utricle ovoid, 

 often tubercled, irregularly dehiscent, about I" long. 



Swamps and river shores, Quebec to North Dakota, 

 south to Kentucky, Louisiana and Missouri. Consists of 

 several races, diifering in size and habit. July-Sept. 



Celosia argentea L., a tall glabrous herb with white 

 or pmk flowers subtended by a bract and bractlets in a 

 long dense spike, having 5 sepals, filaments adnate at 

 the base, and the ovary with several ovules, widely dis- 

 tributed in tropical regions, has been found as a waif in 

 Montgomery County, Pennsylvania. 



