CATALOGUE OF FOREST TREES. 29 



21. Porliera angustifolia, Gray, 

 Smithsonian Contrib. iii, 28. Torrey, Bot. Mcx. Boundary Survey, 42. 



Guaiacum angmtifolium, Engeluiann, Wializnu" Rep. 29. Gray in Jour. Boston Soc. Nat. Hist, vi, 158; Genera, ii, 123, 

 t. 149. Walpers, Ann. iii, 840. Watson in Proc. Am. Acad. xvii, 334. 



Western Texas, valley of the Colorado river to the Eio Grande (Austin, Matagorda bay, New Braunfels., San 

 Antonio, Brownsville, FortMcIntosh), extending west to the Bio Pecos (Havard); in northern Mexico. 



A small tree, 8 to 10 meters in height, with a trunk 0.15 to 0.20 meter in diameter, or toward its eastern, northern, 

 and western limits reduced to a low shrub; reaching its greatest development in the United States on the calcareous 

 hillsides bordering the valley of the Guadalupe river. 



Wood exceedingly heavy, very hard, close-grained, compact, the open ducts smaller and less regularly 

 distributed than in Guaiacum ; medullary rays very thin, numerous ; color, rich dark brown, turning green with 

 exposure, the sap-wood bright yellow ; specific gravity, 1.1101 ; ash, 0.51 ; probably possessing medicinal properties 

 similar to those of lignum-vitae. 



RUTAOE^l. 



22. Xanthoxylum Americanum, Miller, 



Diet. No. 2. Du Roi, Obs. Bot. 57. Wangenheim, Arner. 116. Torrey & Gray, Fl. N. America, i, 214. Torrey in Nicollet's Rep. 147. 

 Emerson, Trees Massachusetts, 509 ; 2 ed. ii, 581. Gray, Genera, ii, 148, t. 156; Pacific R. R. Rep. xii 2 , 41 ; Manual N. States, 5 

 ed. 110. Richardson, Arctic Exped. 423. Parry in Owen's Rep. 610. Darby, Bot. S. States, 253. Cooper in Smithsonian Rep. 

 1858, 250. Wood, 01. Book, 282; Bot. & PI. 70. Engelmann in Trans. Am. Phil. Soc. new ser. xii, 187. Koch, Dendrologie, i, 

 563. Vasey, Cat. Forest Trees, 8. 



X. Clava-Herculis, Lamarck, Diet, ii, 38; 111. t. 811, f. 3 [not Linnaeus]. Aiton, Hort. Kew. iii, 399. Mcench, Meth. 340. 

 X. fraxinifolium, Marshall, Arbustum, 167. B. S. Barton, Coll. i, 52; ii, 38. 



X. fraxineum, Willdenow, Spec, iv, 757; Enum. 1013; Berl. Baumz. 413. Persoon, Syn. ii, 615. Desfontaines, Hist. Arb. 

 ii, 343. Alton, Hort. Kew. 2 ed. v, 383. Pursh, Fl. Am. Sept. i, 210. -Nuttall, Genera, ii, 236. Nouveau Dnhamel, vii, 

 3, t. 2. Hayne, Dend. Fl. 197. Bigolow, Med. Bot. iii, 156, t. 59; Fl. Boston. 3 ed. 405. Do Candolle, Prodr. i, 726. 

 Sprengel, Syst. i, 945. Torrey, Compend. Fl. N. States, 373. Rafinesque, Med. Bot. ii, 113, f. 96. Don, Miller's Diet, 

 i, 802. Eaton, Manual, 6 ed. 399. Beck, Bot. 70. Spach, Hist. Veg. ii, 364. Linclley, Fl. Med. 216. Loudon, 

 Arboretum, i, 488, f. 158 & t. Dietrich, Syn. ii, 1000. Hooker, Fl. Bor.-Am. i, 118. Eaton & Wright, Bot. 482. Nees, 

 PI. Wied. 5. Griffith, Med. Bot. 195, f. 103. Browne, Trees of America, 150. Agardh, Theor. & Syst. PL 1. 19, f. 9. 

 Schnizlein, Icou. t. 250, f. 1-14. Maout & Decaisne, Bot. English ed. 324 & figs. Baillon, Hist. PL iv, 398 r f. 433-438. 



X. mite, Willdenow, Enum. 1013. Poiret, Suppl. v, 622. De Candolle, Prodr. i, 727. Don, Miller's Diet, i, 802. Loudon, 

 Arboretum, i, 489. 



X. ramrflorum, Michaux, Fl. Bor.-Am. ii, 235. 



X. tricarpum, Hooker, Fl. Bor.-Am. i, 118 [not Michaux]. 



Thylax fraxineum, Rafinesque, Med. Bot,ii, 114. 



PRICKLY ASH. TOOTHACHE TREE. 



Eastern Massachusetts, west to northern Minnesota, eastern Nebraska, and eastern Kansas, south to the 

 mountains of Virginia and northern Missouri. 



A small tree, not often 7 meters in height, with a trunk 0.15 to 0.20 meter in diameter; or, reduced to a shrub, 

 1.50 to 1.80 meter in height; common and reaching its greatest development in the region of the great lakes; 

 rocky hillsides, or more often along streams and rich river bottoms. 



Wood light, soft, coarse-grained; medullary rays numerous, thin ; color, light brown, the sap-wood lighter; 

 specific gravity, 0.5054; ash, 0.57. 



The bark of Xanthoxylum, an active stimulant, is used in decoction to produce diaphoresis in cases of 

 rheumatism, syphilis, etc., and as a popular remedy for toothache (U. S. Dispenxatvry, 14 ed. 940. Bentley in 

 Tendon Pharm. Jour. 2 ser. v, 399. Guibourt, Hist. Drogues, 1 ed. iii, 562. Nat. Dispensatory, 2 ed. 1535). 



