136 LILIACE^. Thrinax. 



desert, in moist alkaline soil, or solitary and scattered near the heads of 

 small ravines formed by watercourses ; often stunted and greatly injured 

 by fire. 



Wood light, soft ; fibro-vascular bundles hard, difficult to cut, dark- 

 colored, conspicuous. 



406. Thrinax parviflora, Sw. 

 Silk-top Palmetto. 



Southern keys of semi-tropical Florida ; in the West Indies. 



A small tree, 9 metres in height, with a trunk rarely exceeding 

 0.10 metre in diameter, or in pine-barren soil often low and stemless 

 (P. Garberi, Chapm.). 



Wood light, soft ; fibro-vascular bundles small, hard, not conspicuous ; 

 color light brown ; the trunk used in making sponge- and turtle-crawls. 



407. Thrinax argentea, Lodd. 



Silver-top Palmetto. Brickley Thatch. Brittle Thatch. 



Southern keys of semi-tropical Florida : in the West Indies. 



A small tree, 7 to 9 metres in height, with a trunk 0.15 to 0.20 metre 

 in diameter. 



Wood light, soft; fibro-vascular bundles small, very numerous; interior 

 of the trunk spongy, much lighter than the exterior ; used for piles, the 

 foliage in the manufacture of ropes, for thatch, etc. 



408. Oreodoxa regia, HBK. 

 Boyal Palm. 



Semi-tropical Florida, — hummocks near Cape Romano to the south- 

 ern keys ; in the West Indies. 



A tree 18 to 30 metres in height, with a trunk 0.G0 metre in diameter ; 

 rich hummocks, often forming extensive groves; in Florida rare ami 

 local. 



Wood heavy, hard; fibro-vascular bundles large, very dark, conspicu- 

 ous ; interior of the trunk spongy, much lighter than the exterior ; color 

 brown. 



LILIACE^E. 



409. Yucca canaliculata, Hook. 

 Spanish Bayonet. 



Texas, — Matagorda Bay, and from the Brazos and Guadalupe Rivers 

 to the Rio Grande ; in northern Mexico. 



A small tree, 5 to 8 metres in height, with a trunk 0.30 to 0.75 metre 

 in diameter ; dry, gravelly, arid soil. 



