EUPHORBIACEA. 131 
22. RICINUS. © 
Ricinus, Linn. Gen. Plant. n. 1085; Benth. et Hook. Gen. Plant. ii. p. 321. 
A robust herbaceous monotype. 
1. Ricinus communis, Linn. Sp. Pl. ed. 1, p. 1007, excl. syn. pr. p. et var. 6; 
DC. Prodr. xv. 2, p. 1017 (varietates 16); Jacq. Ic. Pl. Rar. tt. 195 et 196; Baill. 
Etud. Gén. Euphorb. tt. 10 et 11. | 
The castor-oil plant is now found wild in nearly all warm countries, including 
Mexico and Crenrrat America; but it is impossible to determine where it is really 
indigenous. Hb. Kew. 
23. PLUKENETIA. 
Plukenetia, Linn. Gen. Plant. n. 1080; Benth. et Hook. Gen. Plant. in. p. 327. 
Shrubs or half-shrubs. About twelve species, widely dispersed in tropical countries, 
though none have hitherto been found in Australia. 
1. Plukenetia penninervia, Miill. Arg. in Linnea, xxxiv. p. 158, et in DC. 
Prodr. xv. 2, p. 770. 
Mexico (hb. Pavon).— VENEZUELA. 
24, TRAGIA. 
Tragia, Linn. Gen. Plant. n. 1048 ; Benth. et Hook. Gen. Plant. iii. p. 329. 
Herbs or climbing shrubs. About fifty species, widely spread in the tropics, and 
extending into extratropical South Africa and North America. 
1. Tragia bailloniana, Miill. Arg. in Linnea, xxxiv. p. 178, et in DC. Prodr. 
xv. 2, p. 927. 
Zuckertia cordata, Baill. Etud. Gén. Euphorb. p. 496, t. 4. figg. 10-18. 
Soutn Mexico, Teapa (Linden). 
2. Tragia laciniata, Miill. Arg. in Linnea, xxxiv. p. 182, et in DC. Prodr. 
xv. 2, p. 933. 
Tragia urticefolia, var. laciniata, Torr. Bot. U.S. & Mex. Bound. Surv. p. 200. 
Nortu Mexico, Sofiora (Wright, 1795 ; Thurber). Hb. Kew. 
3. Tragia mexicana, Miill. Arg. in Linnea, xxxiv. p. 181, et in DC. Prodr. Xv. 
2, p. 931. 
Sourn Mexico, near Hacienda de Jovo (Liebmann). 
4. Tragia nepetefolia, Cav. Ic. Pl. vi. p. 37, t. 557. fig. 1. 
w. dissecta, Miill. Arg. in DC. Prodr. xv. 2, p. 933. 
"Mexico (hb. Pavon). 
s 2 
