52 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



CHRYSOPSIS, Nutt. 



C. sp. 



Roadside near Izamal, Jan. 15, 1895 (97). Three feet high, 

 nearly out of flower. 



EGLETES, Less. 



E. viscosa, Less. 



Yucatan, loc. ignot. {Johnson). 



AMELLUS, P. Br. 



A. aspera (Jacq.) O.K. 



Calea aspera, Jacq. Melanthera deltoidea, Michx. Island of 

 Cozumel (Gaunter, 1886). 



A. niveus (Linn.) O.K. 



Bidens nivea, Linn. Melanthera hastata, Rich. On the beach 

 near the Lagoona Colombia, Island of Cozumel, Jan. 7, 1895 

 (61). Island of Cozumel (Gaunter, 1885). Yucatan, loc. ignot. 

 (Johnson). 



ERIGERON, Linn. 



E. Canadensis, Linn. 



Island of Cozumel (Gaumer, 1885). 



PLUCHEA, Cass. 



P. purpurascens (Sw.) DC. 



Conyza purpurascens, Sw. Island of Cozumel (Gaunter, 1885). 



P. odorata (Linn.) Cass.. 



Conyza odorata, Linn. Streets of Izamal, Jan. 23, 1895 (176). 

 Island of Mugeres (Gaumer, 1886). 



PARTHENIUM, Linn. 



P. Hysterophorus, Linn. 



Island of Cozumel (Gaumer, 1885 and 1886). 



AMBROSIA, Linn. 



A. hispida, Pursh. 



Ambrosia crithmifolia, DC. Sea shore, Island of Cozumel 

 (Gaunter, 1885). " Very Abundant." 



BLAINVILLEA, Cass. 



B. dichotoma (Murr.) Cass. 



Verbesina dichotoma, Murr. Island of Cozumel (Gaumer, 1886). 



