ANALYTICAL KEY 13 



i. Leaves simple. 



j. Flowers pink. WILD CRAB, PYRTJS CORONARIA (p. 77). 



j. Flowers white. 



k. Ovary one-celled. WILD PLUM, PRUNTJS AMERICANA (p. 80). 

 k. Ovary 25 celled. 



HAWTHORN, CRATAEGTTS (many species) (p. 77). 

 j. Flowers yellow or yellowish-green. 

 k. Leaves pinnately veined. 



BARBERRY, BERBERIS VULGARIS (p. 67). 

 k. Leaves palmately veined (Gooseberry). 



1. Ovaries and fruits bristly; calyx lobes decidedly shorter than the 

 tube; leaves pubescent. RIBES CYNOSBATI (p. 75). 



1. Ovaries and fruits smooth; calyx lobes as long as or longer than 

 tube; leaves smoothish. RIBES OXYACANTHOIDES (p. 75). 

 h. Plants unarmed. 

 i. Leaves compound. 

 j. Leaves trifoliolate. 



k. Flowers appearing decidedly before the leaves; leaves rounded, 

 toothed. FRAGRANT SUMAC, RHTJS CANADENSIS (p. 89). 



k. Flowers appearing after the leaves; leaves pointed, entire. 



HOP TREE, PTELEA TRIFOLIATA (p. 87). 

 j. Leaves pinnate. 

 k. Stipules free from the petiole. 



MOUNTAIN ASH, PYRUS AMERICANA (p. 77). 

 k. Stipules adnate to the petiole. 



WILD ROSE, ROSA BLANDA (p. 79). 

 i. Leaves simple. 

 j. Petals six, brown purple; sepals three. 



PAPAW, ASIMINA TRILOBA (p. 66). 



j. Petals five, rose purple or red-purple; sepals five-parted. 

 k. Flowers appearing decidedly before the leaves; corolla irregular. 

 REDBUD, CERCIS CANADENSIS (p. 82). 

 k. Flowers appearing after the leaves; corolla regular. 



ROSE-FLOWERING RASPBERRY, RTIBTJS ODORATUS (p. 81). 

 j. Petals greenish or yellowish. 

 k. Leaves palmately veined. 



WILD BLACK CURRANT, RIBES FLORIDUM (p. 75). 

 k. Leaves pinnately veined (Holly family). 

 1. Petals oval to obovate, adnate to the stamens. 



WINTERBERRY, ILEX VERTICILLATA (p. 89). 

 1. Petals linear, free from the stamens. 



MOUNTAIN HOLLY, NEMOPANTHTJS MUCRONATA (p. 89). 

 j. Petals white. 

 k. Stamens four; calyx four-parted. 



ALTERNATE-LEAVED DOGWOOD, CORNTJS ALTERNIFOLIA (p. 100). 

 k. Stamens fifteen or more; calyx five-parted (Rosaceae). 

 1. Stamens 1520; pistil solitary (Primus). 

 m. Flowers racemose, appearing after the leaves. 



CHOKEBERRY, PRTJNUS VIRGINIANA (p. 80). 

 m. Flowers umbellate, appearing before or with the leaves. 

 n. Flowers appearing with the leaves; bark red-brown; distinctly 

 tree-like in habit, with a conspicuous primary trunk. 



WILD RED CHERRY, PRTTNTJS PENNSYLVANICA (p. 80). 



