FLORA OF XORTH-"\^^ STERN SIEXICO. 2G9 
15. Casearia corymbosa, H.B.K, De Cand. Prodr. vol. ii. p. 49. Acapulco (Lay aiid Collie !). 
16. Samyda serrulata, Linn., De Caud. Prodr. vol. ii. p. 47. Acapulco (Barclay !) 
VIOLACE^E. 
17. Viola Hookeriana, H.B.K., De Caud. Prodr. vol. i. p. 296. Sierra Madre 
POLYGALEyE. 
18. PoLYGALA (§ Timutua) incarnata, Linn., De Cand. Prodr. vol. i. p. 327. In savanas. 
Geographical distribution: Oaxaca (Linden, no. 7^!), Jalapa (Guleotti, no. 7096!), New Orleane (T. 
Drummond, no. 30!), West Florida (N. A. Ware!), North Carolina (W. D.!), Texas (Lindheimer!), and N. 
Caesaria (Nuttall!). 
19. PoLYGALA (§ Timutua) bicolor, H.B.K., Dc Cand. Prodr. vol. i. p. 327.— P. alba, Nutt. 
Gen. vol. ii. p. 87 !— P. aparinoides, Hook, et Arn. Bot. Beech, p. 277!— P. asperuloides, H.B.K., 
Nov. Gen. vol. v. p. 403 !— P. Bdrichii, Torr. et Gray, Fl. N. Amer. vol. i. p. 130!— P. Boykinii, 
Nutt. in Journ. Acad. Phil. vol. vii. p. 86!— P. distam, St. Hil. Fl. Bras. vol. ii. p. 24. t. 84!— P. 
molluginifolia, St. HU. 1. c. p. 25 ! Sierra Madre (Seemauu, no. 2153 !) ; Talisco (Lay and Collie !). 
This species is closely alHed to P. verticillata, Linn. (P. galioides, Poir. ! P. amligun, Nutt. I P. lepto- 
caulis, Torr. et Gray !), an annual plant, from which it chiefly differs in its perennial root. The leaves are 
either alternate, opposite, or verticillate ; when, as is often the case, they are present on mdividual plants in 
all three positions ; the lower are opposite, the middle ones verticillate, and the upper ones alternate. The 
colour of the flowers varies, being greenish-white, white, rose-colour, and dark purple. *' The specific name 
alba is not appropriate, as the plant varies to deep purple and purplish leaves."— C. A. Geyer, Momorand. 
in Herb. Hook. 
Geographical distribution: Michocau (Galeotti, no. 876!), Zacatocas (Hartweg, no. 30 ! Coulter, no. 
725!), Talisco (Lay and Collie !), some other part of Mexico, not apecified( Gregg, no. 371 !), Rio Colorado 
(Gordon !), Texas (Lindheimer ! Drummond, no. 26 ! Berlandier, no. 2437 !), Upper Platte, with MamillaHa 
simplex and Evohuhis argenteus (C. A. Geyer, no. 276!), valleys in the mountains beyond the Limpia (C. 
Wright, no. 09!), Florida and Alabama (Rugel!), New Orleans (Drummond!), Darien (Seemann, no. 1049!), 
Rio Grande (Tweede!), Eio Grande do Sal, Brazil (Isabelle!), Columbia (Hartweg, no. 900!). 
20. PoLYGALA (§ Timutua) paniculata, Linn., De Cand. Prodr. vol. i. p. 329. Cerro dc Pinal. 
+ 
I found both the white and the purple-flowering variety. 
Geographical distribution: In Mexico, Jalapa (Coulter, no. 724!), Mirador (Linden, no. 172!), Real 
del Monte to Zacatecas (Coulter, no. 727 !) ; out of Mexico: Guatemala (Skinner!), Texas (Berlandier, no. 
2138 I), Columbia (Hartweg, no. 898 !), Loja, Ecuador (Seemann, no. 838 !). 
21. PoLYGALA (§ Timutua) scoparia, H.B.K., De Cand. Prodr. vol. i. p. 329. — P. spinescens, 
Gillies in Hook. Bot. Misc. vol.'iii. p. 146 ! New Mexico (H. B.). 
Geographical distribution : Near El Parso, New Mexico (C. Wright, no. 100 !), Chile (Gillies !). 
22. PoLYGALA (§ Senega) floribunda, Benth. Plant. Hartw. p. 58. — P. ligustroides j Aug. St. Hil. 
Fl. Bras. Mer. vol. ii. p. 49 ! — P. oleafoUa, A. St. Hil. 1. c. ! Zonaguia (Hartweg !), 
On comparing the specimens of Hartweg, no. 447, and described by Bentham as P.JlorihunJaj it will 
