The Trees of Texas 111 



ter, ol)ov<ite to globose, about ^4' long, dull orange with small 

 dots. 



In tin- bottom lands of the Trinity River. 



9. Crataegus Texana Buckley. Texas Thorn. A medium 

 sized round topped tree 25-30 high with scaly bark, reddish 

 brown twigs and chestnut colored spines. Leaves broadly 

 ovate, pointed at the 'apex, doubly serrate, frequently 4-5 

 lobed above the middle, 3'-4' long, 21//-3' wide, amooth above, 

 hairy below. Corymbs many flowered, hairy, the flowers large. 

 Fruit ripening in the autumn, pear-shaped when young, be- 

 coming short oblong at maturity, %'-!' long, bright scarlet, 

 with pale dots. In bottom lands, central and west Texas. 



AMYGDOLACEAE Reichenbach. The Plum Family. 



Trees or shrubs with alternate simple serrate leaves which 

 are firm or leathery and sometimes persistent until the follow- 

 ing season. Flowers regular, perfect, petals 5, sepals 5, stam- 

 ens numerous. Fruit a one seeded edible drupe. 



Drupes fleshy. 



Flowers umbellate to corymbose, borne before 

 the leaves on branchlets of the previous 



season -. 1. Primus. 



Flowers racemose, borne on branchlets of the 



year after the leaves 2. Padus. 



Drupes dry or nearly so, leaves persistent 3. Laurocerasus. 



PRUNUS (Tournefort) L. Plums and ('berries. 



Drupe purple, red, yellow or orange, with a bloom. . P. tarda. 

 Drupe red or orange without bloom. 



Leaves oblong to obovate, petioles not glandular. . P. Americana. 



Leaves ovate-lanceolate to lanceolate, petioles 



glandular P. hortulana. 



1. Prunus tarda Sargent. Texan Sloe. A small tree 20- 

 25 high with spreading branches, thin, scaly bark, and lus- 

 trous branchlets which become dull with age. Leaves oblong 

 to obovate l^'-S' long, %'-l l /4' wide, pointed, firm, serrate, 

 yellowish green and smooth above, somewhat hairy along the 

 midrib and prominent veins below. Flowers in clusters of 



