PLATANACEAE. 29 



Leaf -blades 2-3-pinnate : fruit a legume : 

 ovary several-ovuled. 

 Petals valvate in the bud. Fam. 6. Mimosaceae. 



Petals imbricate in the bud. Fam. 7. Cassiaceae. 



Flowers irregular. 



Upper petal enclosed by the lateral ones in the bud : 



corolla not papilionaceous. Fam. 7. Cassiaceae. 



Upper petal enclosing the lateral ones in the bud : 



corolla papilionaceous. Fam. 8. Fabaceae. 



Family 1. HAMAMELIDACEAE. Witch-hazel Family. 



Shrubs or trees. Leaves alternate : blades mostly toothed. Flowers 

 perfect, monoecious, or polygamous, variously clustered or silicate. Calyx 

 of 4 or 5 sepals. Corolla of 4 or 5 narrow petals, or wanting. Androe- 

 cium of 4-many stamens. Gynoecium 2- or 3-earpellary. Ovary 2- or 

 3-celled : styles distinct. Fruit a leathery or woody ca^jsule, often elas- 

 tically dehiscent. 



1. HAMAMELIS L. Shrubs or trees with perfect or polygamous flowers, 

 which are borne 3 together on short lateral peduncles. Sepals spreading or 

 reflexed. Stamens 4; filaments short-subulate. Capsule abruptly beaked. 

 1. H. virginiana L. Small tree or shrub: leaf -blades suborbicular, oval- 

 elliptic or obovate, 4-15 cm. long, coarsely erenate: petals yellow, 1-2 cm. 

 long: capsules ovoid to subglobose, 12-15 mm. long, elastically dehiscent. — 

 Fall. 



The Witch-hazel grows in rich or low woods in northern Florida. The brown 

 heart-wood is close-grained, heavy, and hard. (Gont.) 



Family 2. ALTINGIACEAE. Sweet-gum Family. 



Shrubs or trees. Leaves alternate : blades toothed or palmately lobed. 

 Flowers usually monoecious, borne in heads. Calyx and corolla wanting. 

 Androecium of numerous stamens interspersed in scales. Gynoecium of 

 2 partially united carpels. Stigmas introrse. Fruit a head of many con- 

 creted capsules. 



1. LIQUIDAMBAR L. Trees with balsamic sap and corky-winged 



branches. Leaf-blades palmately lobed. Staminate flowers in racemes or 



panicled heads. Pistillate flowers in solitary heads. Fruiting head drooping. 

 Fertile seeds winged at one end. 



1. L. Styraciflua L. Tree becoming 45 m. tall: leaf -blades 5-lobed, the lobes 

 triangular or lanceolate: fruiting heads 3-4 cm. in diameter, persistent: 

 fertile seeds about 1 cm. long. — Spr. 



The Sweet-gum grows in swamps and low hammocks in northern Florida and 

 In the peninsula as far south as the Everglade region. The brown and often red- 

 tinged heart-wood is close-grained, heavy and hard but weak. Also known as 

 Bilsted. (Cont.) 



Family 3. PLATANACEAE. Plane-tree Family. 



Trees. Leaves alternate : blades palmately lobed. Flowei's monoecious, 

 minute, borne on globose receptacles, the heads dense, solitary, spicate, or 

 racemose. Perianth obsolete. Staminate flowers veiy numerous : stamens 

 3-8 : filaments nearly obsolete : anthers elongate, each surmounted by a 

 dilated connective. Pistillate flowers less numerous than the staminate: 

 carpels 2-9, 1-celled, mingled with staminodia which are pilose at the 

 apex, surrounded by long-jointed persistent hairs: styles terminal: stigma 

 1-sided. Fruit a head of elongate achenes, each surrounded by rigid hairs- 



