MAGNOLIACEAE. 125 



Family 3. ANNONACEAE. Custard-apple Family. 



Shrubs or trees. Leaves alternate: blades entire. Flowers perfect, 

 monoecious, or dioecious. Calyx of 3, or 2, sepals. Corolla of mostly 6 

 petals much larg-er than the sepals, those of the inner series smaller than 

 those of the outer, or wanting. Androecium of many stamens, the anthers 

 tenuinating in a blunt glandular appendage. Gynoecium of few or many 

 distinct carpels. Fruit a simple or aggregate berry. 



1. ASIMINA Adans. Ill-scented plants. Leaves mostly deciduous: 

 blades broadened upward. Petals 6, much larger than the sepals, spreading, 

 becoming purple. Carpels few: style subulate. Fruits drooping. 



1. A. triloba (L.) Dunal. A shrub or tree 3-12 m. tall: leaf -blades cuneate 

 to obovate-cuneate or oblong-cuneate, or rarely obovate, 10-30 cm. long: 

 pedicels 10-20 mm. long in anthesis: inner petals less than 20 mm. long: 

 seeds 20-25 mm. long. — Eather common, on river and creek banks. — Spr. — 

 Papaav. 



Family 4. MAGNOLIACEAE. Magnolia Family. 



Shrubs, trees, or vines. Leaves alternate, sometimes apparently 

 whorled : blades entire, toothed, or whorled. Flowers perfect or monoe- 

 cious. Calyx of 3 petaloid sepals or rarely more. Corolla of 5 imbricate 

 -petals as large as the sepals or larger, or more. Androecium of many 

 stamens or rarely of few. Gynoecium of several or many distinct carpels. 

 Fruit a cone of accrescent carpels which become baccate or follicular, or 

 samara-like. 



Leaves not lobed, sometimes merely auricled at the base : mature carpels dehiscent 



berries. 

 Leaves 4-lobed : mature carpels samara-lil<e, indehiscent. 1. Magnolia. 



2. LlEIODENDEON. 



1. MAGNOLIA L. Shrubs or trees. Leaves deciduous or persistent : 

 blades entire or auricled at the base. Flowers perfect, white. Sepals and 

 petals about equal in size. 



Leaves alternate ; blades small : fruit-cones oval, ovoid or globular. 



1. M. virginiana. 

 Leaves approximate at the tips of the branches ; blades large : 



fruit-cones oblong. 2. M. tripctala. 



1. M. virginiana L. A shrub, or tree becoming 25 m. tall, the twigs silky: 

 leaf -blades oblong, elliptic, or oval, 5-15 cm. long: flowers white, globose- 

 campanulate, 3-8 cm. wide: petals elliptic, oblong, oval, or obovate: fruit 

 oval or ovoid, 3-5 cm. long: seeds 8-10 mm. long. — E. S. Eare, in swamps, 

 — Schists. — Spr. — Sweet-bay. Laurel-magnolia. 



2. M. trlpetala L. A tree becoming 14 m. tall, the twigs glabrous: leaf- 

 blades elliptic-oblanceolate or obovate-oblanceolate, 20-70 cm. long: flowers 

 creamy -white, unpleasantly scented: petals oblong-oblanceolate, 11-16 cm. 

 long: fruit oblong, 8-12 cm. long: seeds about 1 cm. long. — Lower Susque- 

 hanna valley. Eare, in ravines. — Schists. — Spr. — Umbrella-tree. 



2, URIODENDRON L. Trees. Leaves deciduous: blades lobed. 

 Flowers perfect, greenish-yellow. Sepals 3, reflexed. Petals 6, broader than 

 the sepals, erect. Fruit a cone of appressed samara-like carpels. 



1. L. Tulipifera L. Tree becoming 60 m. tall, the bark with flat ridges: leaf- 

 blades 6-20 cm. wide, 4-lobed, truncate or notched at the apex: flowers cam- 



