184 ACEEACEAE. 



orange, 3-valved, the scarlet seeds persistent and conspicuous in early winter. 

 Common, in thickets and fence-rows. Early sum. STAFF-TREE. SHRUBBY- 

 BITTERSWEET. CLIMBING-BITTERSWEET. WAXWORK. 



FAMILY 4. STAPHYLEACEAE. BLADDERNUT FAMILY. 



Shrubs or trees. Leaves mostly opposite : blades pinnately compound. 

 Flowers perfect or polygamous, racemose or paniculate, drooping. Calyx 

 of 5 sepals. Corolla of 5 equal petals. Androecium of 5 stamens. 

 Gynoeeium of 2 or 3 partially or wholly united carpels. Fruit an inflated 

 capsule. 



1. STAPHYLEA L. Shrubs or small trees. Leaf -blades pinnate, often 

 3-foliolate. Racemes cluster-like, drooping. Sepals and petals nearly erect. 

 Capsule bladdery, 2-3-lobed. 



1. S. trifoliata L. Shrub: leaflets 3: blades oval or elliptic, varying to ovate 

 or obovate, 5-10 cm. long, serrate: racemes 5-10 cm. long: sepals 7-10 mm. 

 long: petals spatulate, surpassing the sepals: capsules 4-6 cm. long, the lobes 

 apiculate. Common, in rich woods and along streams. Spr. BLADDERNUT. 



FAMILY 5. AESCULACEAE. BUCKEYE FAMILY. 



Shrubs or trees. Leaves opposite: blades palmately compound. 

 Flowers polygamous, in terminal erect racemes or panicles. Calyx of 4 or 

 5 partially united sepals. Corolla of 4 or 5 unequal clawed petals. 

 Androecium of 5-8 stamens. Gynoeeium of 3 united carpels. Fruit a 

 leathery loculicidal capsule. 



1. AESCULUS L. Shrubs or trees. Leaf -blades palmately 5-9-foliolate. 

 Petals with their claws mostly in the calyx-tube. Filaments slender. Capsule 

 smooth or echinate. HORSE-CHESTNUT. 



1. A. parviflora Walt. Shrub: leaflets 5-7: blades elliptic-oblanceolate to 

 obovate, 5-18 cm. long: calyx 5-7 mm. long: lateral petals 12-15 mm. long: 

 capsules globular, 2.5-3 cm. in diameter. S. In thickets, near Fishing Creek. 

 Nat. southward. Early sum. BUCKEYE. 



FAMILY 6. ACERACEAE. MAPLE FAMILY. 



Shrubs or trees. Leaves opposite: blades simple or compound. 

 Flowers perfect or polygamous, in cymes, racemes, or panicles, or often in 

 congested clusters. Calyx of 4 or 5, or rarely more, deciduous sepals. 

 Corolla of 4 or 5, or rarely more, petals, or wanting. Androecium of as 

 many stamens as there are sepals. Gynoeeium of 2 more or less united 

 carpels. Fruit 2 nutlets with wings (samaras). 



Leaves with simple or rarely digitately compound blades : flowers polygamo- 



dioecious. 1. ACER. 



Leaves with pinnately compound blades : flowers dioecious. 2. NEGUNDO. 



1. ACER [Tourn.] L. Shrubs or trees. Leaf -blades simple or digitately 

 compound. Flowers polygamous-dioecious. Disk present. Stamens mostly 8. 

 Samaras 2 together. Spr. MAPLE. 



Flower-clusters expanding before the leaves, sessile or nearly so, not drooping. 



Petals wanting or obsolete : ovary pubescent. 1. A. saccharinum. 



Petals present : ovary glabrous. 2. A. rubrum. 



Flower-clusters expanding with the leaves, drooping : petals 

 wanting. 



