Ptelea. Xanthoxylum.] RUTACEA. 155 
Var. mollis. Torr. & Gray, Fl. 1.680. Engelm & Gray, Pl. Lindh. 33.  Tor- 
rey, Marcy’s Rep. 282. Gray, Pl. Wright. 1. 31; Hall’s Pl. Tex. 5. Wood, Bot. & 
Fl. 71. 
P. (#) tomentosa. Raf. Fl. Lud. 108. 
P. mollis. M.A. Curtis, Am. Jour. Sci. 2. 7. 406 (Bot. Zeit. 8. 529); Bot. N. 
Car. 107. Walp. Ann. 2. 259. Chapman, 67. Young, Fl. Texas, 196. 
RUTA GraveEo.ens, Linn. Gray, Manual, 679. 
THAMNOSMA montanum. Torrey, Frem. Rep. 313 (Bot. Zeit. 5.41); Pac. 
R. Rep. 4. 73, t. 3; Mex. Bound. 42. Walp. Ann. 1. 160. Gray, Pl. Thurb. 804; 
Ives’s Rep. 9. Watson, King’s Rep. 5. 418. 
T. Texanum. Torrey, Mex. Bound. 42. Gray, Hall’s Pl. Tex. 5. 
Rutosma Texanum. Gray, Pl. Lindh. 158; Genera, 2. 144, t.155; Pl. Wright. 
1, 29 & 2. 26; Pl. Thurb. 298 & 304. Torr. & Gray, Pac. R. Rep. 2. 161. 
XANTHOXYLUM Americanum. Mill. Dict.; DuRoi, Obs. Bot. 57. Wan- 
genh. Beschreib. 116. Torr. & Gray, Fl. 1. 214. Torrey, Fl. N. Y. 1. 132; Nicol. 
Rep. 147. Emerson, Mass. Trees, 509. Gray, Genera, 2. 148, t. 156; Pac. R. Rep. 
12. 41; Struct. Bot. 405, f.759-766; Manual, 110. Richards. Arct. Exped. 423. 
Parry, Pl. Minn. 610. Engelm. Pl. Upp. Miss. 187. 
X. Clava-Herculis. Lam. Dict. 2. 88; Ill. t. 811, f. 3. Ait. Hort. Kew. 3. 399. 
Moench, Meth. 340. James, Long’s Exped. 1. 317. 
X. fraxinifolium. Marsh. Arbust. 167. 
X. fraxineum. Willd. Berl. Baum. 418; Spec. 4. 757; Enum. 1018. Persoon, 
2.615. Ait. f. Hort. Kew. 5. 882. Pursh, 210. Nutt. Genera, 2. 236. Nouv. Du- 
ham. 7. 3, t.2. James, Long’s Exped. 2.101. Bigel. Med. Bot. 3. 156, t. 59; FI. 
Bost. 876. DC. Prodr. 1.726. Spreng. Syst. 1. 945. Torrey, Compend. 373. 
Hook. FI. Bor.-Am. 1. 118. Raf. Med. Bot. 2. 118, f. 96. Don, Mill. 1. 802. Beck, 
Bot. 70. Spach, Hist. Veg. 2. 364. Lindl. Fl. Med. 216. Dietr. 2.1000. Eat. & 
Wr. 482. Nees, Pl. Wied, 5. Loud. Arbor. 1. 488, f. 158 & t. 58. Agardh, Theor. 
Syst. t.19,f.9. Schnizl. Icon. t. 250, f. 1-14. Maout & Decne, 365, figs. Baill. 
Hist. Pl. 4. 389, f. 433-438. 
X. mite. Willd. Enum. 1013. Poir. Suppl. 6. 622. DC. Prodr. 1. 727. Don, 
Mill. 1. 802. Loud. Arbor. 1. 489. 
X. ramiflorum. Michx. Fl. 2. 235. 
X. tricarpum. Hook. Fl. Bor.-Am. 1. 118, not Michx. 
Thylax fraxineum. Raf. Med. Bot. 2. 114. 
X. Caribeeum. Lam. Dict. 2.40. See syn. Trian. & Planch. in Ann. Sci. Nat. 
5. 14. 315. 
% X. Floridanum. Nutt. Sylva, 8. 14, t. 85. Chapman, 66. Wood, Bot. & FI. 
70. Young, Fl. Texas, 194. 
XX. Clava-Herculis. Linn. Spec. 270, exel. hab. Jam., not Lam. nor DC. Willd. 
Spec. 4. 754, in part. Elliott, 2. 690. Trian. & Planch. in Ann. Sci. Nat. 5. 14. 317, 
with syn. 
X. fraxinifolium. Walter, 243. 
Fagara fraxinifolia. Tam. Ill. t. 334. 
X. Carolinianum. Lam. Dict. 2. 89; Ill. t. 811,f.1. Torr. & Gray, Fl. 1. 214. 
Engelm. & Gray, Pl. Lindh. 5. Gray, Genera, 2. 148, t. 156, f. 13, 14 (fl.); Man- 
ual, 110; Hall’s Pl. Tex. 5. Scheele, Rom. Texas, 432. Nutt. Sylva, 3. 8, t. 83. 
Curtis, Bot. N. Car. 103. Chapman, 66. 
X. aromaticum. Willd. Spec. 4. 755, excl. syn. Jacq. f. Ecl. 1. 103, t. 70. 
Pseudopetalon glandulosum & tricarpum. Raf. Fl]. Lud. 108; Med. Bot. 2. 114. 
