1898.] NATURAL SCIENCES OF PHILADELPHIA. 383 



South Mexico, Valley of Mexico. Roadsides near Tlalpam and 

 growing on walls and roofs of adobe houses. 



PLANTAGINACEJE. 



31. Plantago Mrtella H. B. K. Nov. Gen. et Sp., II, 229, te 127 ; A. Gray, Synop. 



PI. N. Am., II, 392 ; Biol. Centr. Amer. Bot., II, 575. 



California, Mexico, Chili. Tlalpam, Aug. 20 (153). 



COMPOSITE. 



32. Eupatorium sp. 



Tlalpam, Valley of Mexico, Aug. 20 (179). 



33. Heterotheca Lamarckii Cass, in Diet. Sc. Nat., XXI, 130 ; DC. Prodr., V, 317; 



S. Wats., Proc. Am. Acad., XVIII, 102; Biol. Centr. Amer. Bot,, IV, 52. 



South Carolina, westward and southward, North Mexico, Monte- 

 rey, Nuevo Leon. Tlalpam, Aug. 20 (182). 



34. Heterospermum pinnatum Cav. Ic, III, 34, t. 267 ; Willd., Sp. PI., Ill, 2,129; 



Biol. Centr. Amer. Bot., II, 195. 



North and South Mexico, collected by a number of botanists. 

 Tlalpam, Aug. 20 (219). 



35. Schkuhria virgata DC. Prodr., V, 654; Biol. Centr. Amer. Bot., II, 212. 



North Mexico, region of San Luis Potosi, 6,000 to 8,000 feet (Parry 

 & Palmer) ; South Mexico, Guanajuato (Mendez) ; near Tacubaya 

 (Schaffner) ; Chapultepec (Bilimek) ; Guatemala. Tlalpam, Aug. 

 22 (214). 



C. Lake Xoehimilcho, Valley of Mexico. 



MARSILIACEiE. 



36. Marsilia heterophylla 1 



Ditches near Xoehimilcho, Aug. 15 (78). 



ALISMACJE. 



37. Sagittaria sagittifolia Linn. var. Mexicana, Mart, et Gal. 



S. sagittifolia Linn., Sp. PI., 993; Biol. Centr. Amer. Bot., Ill, 439; var. 

 Mexicana Mart, et Gal. in Bull. Acad. Brux., IX, 8; Micheli in DC. 

 Monogr. Phanerog., Ill, 66. 



Lake Xochimilclio on wet chinampas, Aug. 15 (92). 



CYPERACEJE. 



38. Cyperus unioloides R. Br. Prodr. Fi. N. Hall., 216 ; Clarke in Journ. Linn. Soc., 



XXI, 61. 



Cyperus brompides Willd. ex Link, III, 85 ; Kunth. Enum. PI. II, 8. 



Found in South Mexico, Guatemala, Venezuela and Paraguay. 

 Other varieties of this species are found in India, Australia and 

 South Africa. Lake Xoehimilcho on chinampas, Aug. 15 (93). 



