Descriptive Flora 



91 



Flowers small, white to greenish yellow, blackberry-like, with 

 five widely separated petals. Stamens many, surrounding the 

 central cluster of green pistils. Fruit bur-like clusters, radiating 

 with hooked tips that fasten themselves firmly in one's clothing 

 and play havoc with any perfectly good disposition. In moist, 

 shady river bottoms and ravines. Not common. 



Rosa bract eat a Wendl. Wild Rose. McCartney Rose. "Rosa" 



A climbing or trailing rose with large white or cream-colored 

 flowers, \y<z to 2" across, opening wide, with five broad petals 

 notched at the top and a center of numerous stamens making a 

 heart of gold in blossom. Leaves pinnately compound, alternate. 

 Leaflets five to eleven, deep green, thick, shiny, oval or obovate, 

 finely saw-toothed. Usually growing in thick, matted screens 

 and climbing over fences. An exotic of Asiatic origin. 



MALACEAE. Apple Family. 

 Crataegus mackensenii Sarg. Mackensen's Hawthorn. "Tejocote" 



Small trees or shrubs armed with slender thorns and bearing 

 flowers in snowy white clusters like apple blossoms. Leaves 

 simple, alternate. Blades ovate to round, slightly lobed, the 

 lobes sharply saw-toothed. Leaf like appendages (stipules) at 

 base of the leaf stalk. Flowers on woolly pedicels. Petals 5. 

 Stamens many. Fruit red, edible, apple-like, the size of small 

 marbles, ripening in fall. March and April. In river bottoms. 

 Species named for Bernard Mackensen, a Texas botanist and 

 resident of San Antonio. 



Crataegus crus-galli L. Cockspur Thorn. Hawthorn. 



A small tree or shrub with blossoms and fruit like the pre- 

 ceding species but having more slender thorns and leaf blades 

 that are thick, shiny, much smaller, obovate or oblanceolate, saw- 

 toothed above the middle and without the leaflike stipules at the 

 base of the petiole. In moist soil. 



