188 



sinaliei' tree thao tiie better known Big Cottonwood, seldom renclilnfi: a 

 lieiglit of more than 30 or 50 feet, and 1.] feet in diameter. The timber 

 is ver^y liglit and soft. 



Descripiion. — Leave8 smootli both sides, chiefly ovate-iuuce-shai^ed (sometimes nar- 

 rowly hmce-shaped), with a loug taperiug point, mostly rounded at the base, or some- 

 times tapering slightly at the base; margin with small rounded teeth. Branches 

 round, with smooth bark. 



85.— Cottonwood. Carolina Poplar. Bia Cottonwood. Neck^ 

 LACE Poplar. (Pojynlus monilifera^ Aiton.) 



The common cotton wood along the eastern base of the Eocky Moun. 

 tains (and eastward to the Atlantic Coast). It is abnndant on all the 

 water-courses, and valuable chietly for the rapidity of its growth. The 

 timber is of little commercial importance, yet it is considerably used 

 for cheap lumber, light fuel, -and in the manufactnre of paper-puli) 5 

 unless well protected, it decays rapidl.y when exposed to the weather. 

 In western towns this tree is largely employed as a shade tree, as it 

 reaches a desirable size in a comparatively short time, and is therefore 

 often preferred to other trees. It grows to a height of over 100 feet, 

 and 4 to 6 feet in diameter. 



DcscriiHion. — Leaves broadly triangle-shaped, somewhat licart-shaped or truncated 

 at the base, long-pointed ; margin with blunt incurved, liairy teeth. Young branches 

 angled, but becoming round with age. 



8t).— Cottonwood. White Cottonwood. (Poinilus Fremontii^Wsit 

 son, var. WisUzeni, Watson.) 



This species is found in southern Colorado, through l^ew Mexico 

 (western Texas, Arizona, southern California), and is the prevailing Cot- 

 tonwood of the arid localities ; rather abundaiit along streams in open 

 country, but quite rare on precipitous sites. It is a large tree, com- 

 monly attaining a height of 50 to 80 feet, with a diameter of 3 to 4 feet. 

 The wood is soft and light, but supplies the ordinary fuel of the region. 



Descrl2)iion. — Leaves broadly triangle-shaped, sharp-pointed, somewhat wedge- 

 shaped or truncate, and with more or less broad shallow sinuses at the base ; margin 

 with a few distant, blunt (occasionally incurved) teeth. YouDg bark yellowish, but 

 becoming gray with age. 



LILIACE^: LILY FAMILY. 



[Tbe pLmts bclonfring to this family are termed endosrenona or inside jirowcrs, the woody stems 

 beiug made up of a miugled mass of fibers, aud not marked by aunual rings as in tbe pines, maples, 

 t lms, etc. — exogenous or outside growers ] 



87.— Spanish Bayonet. {Yncca elata, Engelmano.) 



A small tree, with a trunk usually not more than 10 to 15 feet in 

 height aud 4 to 7 inches in diameter. It is commonly met with in the 

 dry gravelly soil of table-lands, ranging through western Texas, Ari- 

 zona to Utah (probably in ISTew Mexico), and southward into Mexico, 

 wood light, soft, and brittle. 



