384 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



Although there is a great variation in the shape of the juvenile 

 leaves the mature only being constant and typical I have little 

 hesitancy in referring the following young plants to this species, 

 Schott, 321, Merida, 1865 ; Gautner, 7, Cozumel Island, 1885 

 " new species?" (Oliver); and Gaumer, 678, "common at the 

 Port of Silam, April, 1895." Road beyond Xcholac, 15 feet high, 

 flowers lemon-yellow, March 2, 1890 (Stone, 255, in Herb. Acad. 

 Sci., Phila.). 



VINCA ROSEA Linn. Syst. ed x, 944. 



Suburbs of Merida, common as a roadside weed. "April 14, 

 1887 (Millspaugh, 44). 



ASCLEPIADACE.E. 



ASCLEPIAS CURASSAVICA Linn. Sp. PI., 314. 



"Herb 3 feet high, abundant in damp situations near Izamal, 

 its yellow flowers produced throughout the year " (556). Sub- 

 urbs of Merida, Jauuary 5, 1865 (Schott, 182). 



METASTELMA SCHLECHTENDALII Decne. in de C. Prod, viii, 513. 

 Tekanto, Feb. 25, 1890 (Stone, 203, in Acad. Sci., Phila.). 



CONVOLVULACE^:. 



EVOLVULUS ALSINOIDES Linn. Sp. PI. 392. 



" Herb 18 inches high, common in the forests of Buena Vista 

 Xbac, April" (1067). Merida, June, 1865 (Schott, 64}. 



IPOMCEA BONA-NOX Linn. Sp. PI. ed. ii, 228. 

 Nohcacab, Oct. 20, 1865 (Schott, 684). 



Ipomcea cissoides Griseb. Fl. Brit. W. Ind. 473. 



"Vine 10 ft., abundant in old fields about Izamal, producing 

 its satiny-white flowers in November" (982). Range between 

 Sacacab and Tikul, Oct. 20, 1865 (Schott, 905}. 



IPOMOZA COCCINEA Linn. Sp. PI. 228. 



"Vine 20 ft., common in old fields about Izamal, producing 

 its bright red flo\vers from October to December " (981, 990). 



IPOMOZA FASTIGIATA Sweet Hort. Brit. ed. i, 288. 



"Vine 15 ft., common in old fields near Izamal " (915). 



Ipomcea hederacea Jacq. Coll. i, 124. 



"Vine 20 feet, common in towns and the fields about Izamal, 

 blossoming in October and November. Flowers deep sky-blue 

 changing to rose on drying " (919, 983). Merida, 1865. (Schott, 

 906}. 



"Vine 30 feet, rare at Buena Vista Xbac; flowers bright rose- 

 pink " (769). In Gaumer's 919 and 983 the flowers are large and 

 longpeduncled and the leaves 7 inches broad by 5 inches long, 



