ASCLEPIADEA, 321 
3. Macroscepis tristis, Benth. et Hook. Gen. Plant. ii. p. 751. 
Schubertia tristis, Seem. Bot. Voy. ‘ Herald, p. 160. 
PanaMa, Rio de Santa Maria (Seemann, 158). Hb. Kew. 
4. Macroscepis, sp. ? 
SoutH Mexico, valley of Cordova (Bourgeau, 1510). Hb. Kew. 
4, OXYPETALUM. 
Oxypetalum, R. Br. in Mem. Wern. Soc. i. p. 41; Benth. et Hook. Gen. Plant. ii. p. 752. 
Herbs or shrubs. About fifty species in South America, chiefly in Brazil. 
1. Oxypetalum riparium, H. B. K. Nov. Gen. et Sp. iii. p. 197; DC. Prodr. 
viii. p. 582. 
Gothofreda cordifolia, Vent. Choix, t. 60. 
Sourn Mexico, Vera Cruz, 2000 to 3000 feet (Galeotti, 1576 ; Linden, 350), valley 
of Cordova (Bourgeau, 1481).—Southward to Peru and Brazit, and in the West InpIEs. 
Hb. Kew. 
5. ASCLEPIODORA. 
Asclepiodora, A. Gr. in Proc. Am. Acad. xii. p. 66. 
Two herbaceous species. 
1. Asclepiodora decumbens, A. Gr. Synop. Fl. N. Am. ii. p. 89. 
Anantherix decumbens, Nutt. in Trans. Am. Phil. Soc. ser. 2, v. p. 201. 
Acerates decumbens, Dene. in DC. Prodr. viii. p. 522. 
Asclepias brevicornu, Scheele in Linnea, xxi. p. 756. 
Uta; New Mexico; Arkansas; Texas.—Nortu Mexico (ex A. Gray). 
2. Asclepiodora viridis, A. Gr. in Proc. Am. Acad. xii. p. 66; Synop. FI. N. 
Am. ii. p. 89. 
Gomphocarpus viridis, Spreng. Syst. Veg. 1. p. 849. 
Asclepias viridis, Walt. Carol. p. 107. 
Anantheriz paniculatus, Nutt. in Trans. Am. Phil. Soe. ser. 2, v. p. 201. 
Acerates paniculata, Dene. in DC. Prodr. viii. p. 521. 
Asclepias longipetala, Scheele in Linnea, xxi. p. 757. 
Uran; ARKANSAS; TExAS; New Mexico.—Nortu Mexico (ex A.Gray); Souta Mexico, 
San Felipe (Andrieux, 232), region of Orizaba (Bourgeau, 2904). Hb. Kew. 
6. ACERATES. 
Acerates, Ell. Sk. i. p. 316; A. Gr. Proc. Am. Acad. xii. p. 66; Benth. et Hook. Gen. Plant. ii. 
p-. 754, sub Gomphocarpo. 
About eight herbaceous species, inhabiting North America from Canada to Mexico. 
1. Acerates asperula, Dene. in DC. Prodr. viii. p. 522. 
Souta Mexico, near Huejutla (Ghiesbreght). 
BIOL. CENTR.-AMER., Bot. Vol. II., December 1881. 2t 
