DICOTYLEDONS. 57 



2. j\r. ALBA L. White ]\[ulberry. A small tree; leaves ovate- 

 cordate, acute at the apex, rounded and often oblique at the base, 

 serrate or sometimes lobed, smooth and shining on both sides, 

 mature fruit light red or white. April-May. Fruit June-rJuly. 

 Introduced and common about old dwellini>s. 



II. TOXYLON. ^ 



A small tree with milky juice ; leaves alternate, i)etioled, 

 spines axillary ; flowers dioecious ; staniinate flowers in short 

 axillary racemes ; calyx 4-parted ; stamens 4, inflexed in 

 the bud; pistillate flowers in axillary, pedunculate, capitate 

 clusters ; calyx 4-parted, ovary sessile, style long- ; calyces 

 becoming thickened and fleshy in fruit and aggregated into a 

 large, dense, globular head. 



T. POMiFERUM Raf. Osage Orange. A small tree with ridged, 

 yellowish-brown bark ; leaves puberulent when young, becoming- 

 smooth and shining with age, ovate or ovate-oblong, acuminate at 

 the apex, obtuse or subcordate at the base, entire, petioled ; stanii- 

 nate racemes about 1 in. long; pistillate flower clusters about 1 in. 

 in diameter ; fruit yellowish, tiibercled, 3-4 in. in diameter. In rich 

 soil. April-]\Iay ; fruiting- in October or November. Native in 

 Texas and extensively planted for liedges. Wood very durable 

 when exposed to the weather, and used for fence posts. As the 

 wood does not swell or shrink with changes in its moisture, it is 

 valued highly for wlieel hubs, etc. 



III. BROUSSONETIA. 



Small trees with milky juice ; leaves alternate, pctioliMl ; 

 flowers dicecious ; staminate in cylindrical spikes, witli a4-ch'ft 

 calyx, 4 stamens and a rudimentary ovary; })istilhite flowers 

 in ca])itate clusters, calyx o 4-toothed, ovary stalked, style 

 U-cleft, I'ruit in a globular liead. 



B. I'Ai'YRri'ERA (\j.) Vent. Paper MrLUERRV. A round-headed 

 tree with yellowish-brown bark; leaves cordate, often irregularly 

 2-3-lobed, serrate, rough above, tomentose beneath, long-jx'tioled ; 

 staminate sjiikfdets j)e(hnicled, 2-."! in. long; pistillate heads stout, 

 peduneled, al>out 1 in. in diameter. April .Nhiy. Introduced from 

 Asia and very common about old dooryards. 



