Jennings: Contribution to Botany of Isle of Pines. 113 



spines few and poorly developed" (Millspaugh). General Distri- 

 bution: From Massachusetts to Kansas and south through the 

 Bermudas, Bahamas, West Indies, and continental America. Also 

 in warmer parts of the Old World. Often a troublesome weed. 



251. Centrostachys indica (Linnaeus) Standley. 



Achyranthes aspera var. indica Linn^us, Species Plantarum, I, Ed. i, 1753, p. 204. 

 Achyranthes indica Miller, Gardener's Dictionary, Ed. 8, 1768, No. 2. 

 Achyranthes obtusifolia Lamarck, Encyclopedic Methodique, Botanique, I, 1783, 



P- 545- 

 Achyranthes aspera Moquin, in DeCandolle, Prodromus Systematis Naturalis 



Regni Vegetabilis, XIII, (III), 1849, p. 314. 

 Achyranthes aspera var. obtusifolia Grisebach, Flora of the British West Indian 



Islands, 1864, p. 62. 

 Centrostachys indica Standley, Journal of the Washington Academy of Sciences, 



V, 191S, p. 75- 



Near Nueva Gerona, March 22, 1904, A. H. Curtiss, No. 424; 

 near magnesian spring, Sante Fe, May 26, 1910, 0. E. Jennings, No. 

 S76. General Distribution: Southern Florida and generally, through 

 the tropics as a weed. 



252. Gomphrena dispersa Standley. 



Gomphrena decumbens Moquin-Tandon, in DeCandolle, Prodromus Systematis 

 Naturalis Regni Vegetabilis, XIII (2), 1849, p. 410. Not Jacquin. 



Gomphrena dispersa Standley, Contributions, U. S. National Herbarium, XVIII, 

 1916, p. 91. 



Near Nueva Gerona, March 13, 1904, A. H. Curtiss, No. 410; 

 A. A. Taylor, No. 88, in 1901, Palmer & Riley, No. 1117, in 1900, 

 on sandy beach at Bibijagua, May 7, 1910, 0. E. Jennings, No. 75; 

 near Nueva Gerona, May, 1912, G. A. Link. General Distribution: 

 A common weed of the Greater Antilles, Florida, and from Mexico to 

 Costa Rica. 



253. Alternanthera paronychioides A. St. Hilaire. 



Alternanthera polygonoides R. Brown, Prodromus Florae Novae-Hollandiae et 



Insulae Van Diemen, I, 1810, p. 417. 

 Alternanthera paronychioides A. St. Hilaire, Voyage au Bresil, II, 1833, p. 439. 

 Alternanthera ficoides Grisebach, Flora of the British West Indian Islands, 1859 



p. 67. 



Near Nueva Gerona, March 17, 1904, A. H. Curtiss, No. 418. 

 General Distribution: North Carolina to Texas, Florida, Bahamas, 

 West Indies, and tropical continental America. 



