218 FOREST TREES OF NORTH AMERICA. 



407. Thrinax argentea, Loddiges; 



Desfontaines, Cat. 3 ed. 31. Reenier & Schultes, Syst. vii, 1300. Martius, Hist. Palm, iii, 256, 1. 103, f. 3, t. 163. Kunth, Enum. iii, 253. 

 Dietrich, Syn. ii, 1091. Walpers, Ann. v, 818. Grisebach, Fl. British West Indite, 515. Chapman, Fl. S. States, Suppl. 651. 



Palma argentea, Jacqnin, Fragni. :W, No. 125, t. 43, f.l. Miirter iu Bom. Physik. Arbeiten. ii, 76. 

 SILVER-TOP PALMETTO. BR1CKLEY THATCH. BRITTLE THATCH. 



Semi-tropical Florida, on a nameless key 10 miles west of Key West, Elliott's Key, Key Largo, Piney Key, 

 Boca Chica Key, Key West, Gordon Key, and on the small keys south and west of Bahia Honda Key (Curtiss); in 

 the West Indies. 



A small tree, 7 to 9 meters in height, with a trunk 0.15 to 0.20 meter in diameter. 



Wood light, soft ; fibro-vascular bundles small, very numerous ; interior of the trunk spongy, much lighter 

 than the exterior ; specific gravity, 0.7172 ; ash, 3.01 ; used for piles, the foliage in the manufacture of ropes, for 

 thatch, etc. 



408. Oreodoxa regia, HBK. 



Nov. Genera & Spec, i, 305. Martius, Hist. Palm, iii, 168, t. 156, f. 3-5. Richard, Fl. Cuba, 348. Kunth, Enum. iii, 182. Spaoh, 

 Hist. Veg. xii, 68. 111. Hort. ii, 28 & t. Walpers, Ann. v, 807. Grisebach, Fl. British West Indies, 327. London Gard. Chronicle, 

 1875, 302, f. 66. Chapman, Fl. S. States, Suppl. 651. 



CEnomrpus regia, Sprengel, Syst. ii, 140. 



0. Oleracea, ? Cooper in Smithsonian Rep. I860, 440. 



ROYAL PALM. 



Semi-tropical Florida, " Little and Big Palm hummocks," 15 and 25 miles east of cape Romano (Curtiss), near 

 the mouth of Little river, and on Elliott's Key ; in the West Indies. 



A tree 18 to 30 meters in height, with a trunk 0.60 meter in diameter ; rich hummocks, often forming extensive 

 groves ; in Florida rare and local. 



Wood heavy, hard ; fibro-vascular bundles large, very dark, conspicuous ; interior of the trunk spongy, much 

 lighter than the exterior ; color, brown ; specific gravity, exterior of the trunk, 0.7982, interior, 0.2128 ; ash, 2.54. 



LILIACE^. 



409. Yucca canaliculata, Hooker, 

 Bot. Mag. t. 5201. Baker in London Gard. Chronicle, 1870, 1217. Eugelmaun in Trans. St. Louis Acad. iii, 43. 



Y. Treculiana, Carriere in Rev. Hort. vii, 280. Baker in London Gard. Chronicle, 1870, 828. Engelmann in Trans. St. 

 Louis Acad. iii, 41. Vasey, Cat. Forest Trees, 38. London Garden, xii, 328, t. 94. 



SPANISH BAYONET. 



Southern Texas, Matagorda bay, and from the Brazos and Guadalupe rivers south into Mexico. 



A small tree, 5 to 8 meters in height, with a trunk 0.30 to 0.75 meter in diameter ; dry, gravelly, arid soil. 



Wood, like that of the whole genus, showing distinct marks of concentric arrangement, fibrous, spongy, heavy, 

 difficult to cut and work; color, light brown ; specific gravity, 0.6677 ; ash, 6.27. 



The bitter, sweetish fruit cooked and eaten by the Mexicans; the root stock, as in the whole genus, saponaceous 

 and largely used by the Mexicans as a substitute for soap. 



410. Yucca brevifolia, Engelmann, 



King's Rep. v, 496 ; Trans.St. Louis Acad. iii, 47. Parry in Am. Nat. ix, 141, 351. Vasey, Cat. Forest Trees, 38. Watson, Bot. California, 

 ii, 164. 



F. Draconis, f var. arborescens, Tonvy in Paciiic R. R. Eop. iv, 147. 



