Spring Flora of Oklahoma 
61 
FAMILY 33. PLATANACEiE. Plane Tree Family. 
Trees with simple, alternate, petioled leaves, with stip¬ 
ules. The bases of the petioles covering the buds. Flow¬ 
ers monoecious, in axillary, long peduncled, globose. 
Calyx and corolla very inconspicuous, each consisting of 
3-8 minute scales, or wanting. Stamens as many a 3 the 
sepals and opposite them. Pistils several, conversely 
conical, hairy at the base. Styles long. Capsule 1-seeded. 
I. PLATANUS L. 
Characters of the family. 
1. Platanus occidentals L. Sycamore. Button-wood. A large 
tree, bark light-colored, smooth, peeling off in large, thin plates. 
Leaves large, round-heart-shaped, angularly lobed and toothed, dense¬ 
ly white-woolly when young, becoming smooth with age. Stipules 
large, toothed. 
River banks. Cleveland county to eastern part of state. May. 
FAMILY 34. ROSACEiE. Rose Family. 
Herbs, shrubs or trees with alternate, stipulate leaves 
and perfect flowers. Calyx 5-lobed. Petals 5, rarely 
wanting, inserted with the stamens on the edge of a disk 
that lines the calyx tube. Stamens many. Carpels 1 or 
more, distinct or united, superior or inferior. Fruit a 
pome, a drupe or group of drupes, or 1-several achenes 
or follicles, rarely a berry or capsule. 
Carpels not enclosed in the fleshy calyx-tube. 
Fruit of dry achenes; receptacle very pulpy. 
I. Fragaria. 
Fruit of fleshy or nearly dry drupelets; ovary 2-ovuled. 
II. Rubus 
