1898.] NATURAL SCIENCES OF PHILADELPHIA. 379 



4. Erigeron scaposus DC, Prodr., V, 287. 



Aster rivularis Lees in Linnsea, V, 143, excl. synon. 



Widely distributed in Mexico. Aug. 12 (2). 

 B. Tlalpam Valley of Mexico. 



SALICACE^J. 



5. Salix Bonplandiana H. B. K., Nov. gen. et Sp., II, 24, tt. 101, 102; DC, Prodr. 



XVI, 2, p. 200. 



A tree found in several recorded districts in South Mexico. Along 

 roads leading from Tlalpam to Lake Xochimilcho, " Sauce " (Mex- 

 ico). Aug. 15 (86). 



NYCTAGINACE.SJ. 



6. Mirabilis Jalapa Linn., Sp. PI., 177 ; Choisy in DC Prodr., XIII, 2, p. 427 ; Lam. 



111., PL, t. 105; Bot. Mag., t. 371. 



Roadsides near Tlalpam. Abundant in other parts of Mexico. 

 " Maravilla " (Cuba) ; " Marvel of Peru " ; " Four o'clock " ; 

 " False Jalap." Aug. 15 (81). 



C ARY OPH YLL ACE JE. 



7. Arenana lanuginosa Rohrb. in Mart. Fl.Bras., XIV, ii, 274; Biol. Centr. Amer. 



Bot., I, 69. 

 Arenaria alsinoidesWi\\&. in Ges. Naturf. Fr. Berl. Mag., VII, (1813) 201. 



Common from North Carolina to Mexico, southward to Peru and 

 Bolivia. Tlalpam, Aug. 22 (215). 



ILLECEBRACE^. 



8. Corrigiola Andina Planch & Triana in Ann. Sc. Nat. Ser., IV, XVII (1862) 146; 



Biol. Centr. Amer. Bot., Ill, 11. 



Found in North and South Mexico and Colombia ; Tlalpam, Aug. 

 22 (220). 



RANUNCULACEiE. 



9. Ranunculus orthorhynchus Hook., Fl. Bor. Am., I, 21, t. 9 ; Biol. Centr. Amer. 



Bot., I, 7. 

 Ranunculus dickotomus M09 et Sesse in DC. Syst. Veg. I, 288. 



A widely distributed plant in Mexico. Ditches near Lake Xo- 

 chimilcho, Aug. 15 (80). 



PAPAVERACEiE. 



10. Argemone Mexicana Linn., Sp. PI., 508; Lam. 111., t. 452; Materia Medica 



Mexicana, 153 (plate). 



This is now a common weed in most tropical and sub-tropical 

 countries, flowering from April to October, and abundant in culti- 



