ANALYTICAL KEY 13 



i. Leaves simple. 

 j. Flowers pink. Wild Crab, PYBTTS CORONARIA (p. -jy^. 



■j. Flowers white, 

 k. Ovary one-celled. Wild Plum, PRTTNTTS AMERICANA (p. 80). 

 k. Ovary 2—5 celled. 



Hawthorn, CRATAEGUS (many species) (p. ^^). 

 ji Flowers yellow or yellowish-green. 

 k. Leaves pinnately veined. 



Barberry, BERBERIS VULGARIS (p. dj). 

 k. Leaves palmately veined {.Gooseberry). 

 L Ovaries and fruits bristly; calyx lobes decidedly shorter than the 

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



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

 tube; leaves smoothish. RIBES OXYACANTHOIBES (p. 75)- 

 h. Plants unarmed. 

 i. Leaves compound. 

 j. Leaves trifoliolate. 

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

 toothed. Fragrant Sumac, RHUS 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 BLANBA (p. 79). 

 i. Leaves simple. 

 j. Petals six, brown purple; sepals three. 



Papaw, ASIMIN;A TRILOBA (p. ^^'). 

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

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

 Redbud, CERGIS CANADENSIS (p. 82). 

 k. Flowers appearing after the leaves; corolla regrular, 



Rose-flowering Raspberry, RUBUS ODORATUS (p. .81). 

 j. Petals greenish or yellowish. 

 k. Leaves palmately. veined. 



Wild Black Currant, RIBES ELORIDUM (p. 75). 

 k* Leaves pinnately veined (Holly family). 

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



WiNTERBERRY, ILEX VERTICILLATA (p. 89). 

 I. Petals linear, free from the stamens. 



Mountain Holly, NEMOPANTHUS MUCRONATA (p. 89). 

 j. Petals white. 

 k. Stamens four; calyx four-parted. 



Alternate-leaved Dogwood, CORNUS ALTERNIFOLIA (p. 100). 

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

 1, Stamens 15-20; pistil solitary {Prunus). 

 m. Flowers racemose, appearing after the leaves. 



Chokeberry, prunus 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, PRUNUS PENNSYLVANICA (p. 80). 



