MORACE^E 



331 



lobes much broader than the others, dark green, covered with pale scattered hairs; ovary 

 green and glabrous, with short stigmatic lobes. Fruit: syncarp \' long, red becoming 

 dark purple or nearly black, sweet and palatable; drupe \' long, ovoid, rounded at the 

 ends, with a thin fleshy outer covering and a thick-walled light brown nutlet; seed ovoid, 

 pointed, pale yellow. 



A tree, sometimes 15-20 high, with a trunk occasionally 12'-14' in diameter, and slen- 

 der branchlets covered when they first appear with soft white hairs, soon becoming gla- 



Fig. 30! 



brous or nearly so, and in their first winter light orange-red and marked by small lenticels 

 and small horizontal nearly orbicular elevated concave leaf-scars displaying a ring of 

 fibro- vascular bundle-scars; often a shrub. Winter-buds ovoid, acute, sharp-pointed, and 

 covered by thin lustrous chestnut-brown ovate rounded scales scarious on the margins, 

 those of the inner rows ovate-oblong, rounded at apex, pale-pubescent on the outer surface, 

 and nearly 1' long when fully grown. Bark smooth, sometimes nearly \' thick but usually 

 thinner, light gray slightly tinged with red, deeply furrowed and broken on the surface into 

 slightly appressed scales. Wood heavy, hard, close-grained, dark orange color or some- 

 times dark brown, with thick light-colored sapwood. 



Distribution. Dry limestone hills, or westward only in elevated mountain canons in 

 the neighborhood of streams ; valley of the Colorado River, Texas, southward into Mexico 

 and through the mountain regions of western Texas and southern New Mexico to the 

 Santa Rita Mountains and the canons of the Colorado Plateau, Arizona. 



2. MACLURA Nutt. 

 Toxylon (loxylon) Rafn. 



A tree, with thick milky slightly acrid juice, thick deeply furrowed dark orange-colored 

 bark, stout tough terete pale branchlets, with thick orange-colored pith, lengthening by 

 an upper axillary bud, marked by pale orange-colored lenticels and armed with stout 

 straight axillary spines, short stout spur-like lateral branchlets from buds at the base of 

 the spines, and thick fleshy roots covered by bright orange-colored bark exfoliating freely 

 in long thin persistent papery scales. Leaves involute in the bud, ovate to oblong-lanceo- 

 late, acuminate and apiculate at apex, rounded, cuneate or subcordate at base, entire, 

 penniveined, the veins arcuate near the margins and connected by conspicuous reticulate 

 veinlets; petioles elongated, slender, terete, pubescent; stipules lateral, nearly triangular, 

 minute, hoary-tomentose, caducous. Flowers dioecious, light green, minute, appearing in 



