ACEEACEAE. 65 



1. Ae. Pavia L. Small tree or shrub: leaflets 5-7; blades oblanceolate or 

 elliptie-oblaneeolate : calyx 15-17 mm. long: corolla red; lateral petals 2-3 cm. 

 long, with suborbicular blades : capsules 3-5 cm. in diameter. — Spr. 



The Red-ruckeye grows in rich woods in northern Florida. The wood is pale, 

 often whitish, close-grained, but light and soft. (Cont.) 



Family 6. ACEEACEAE. Maple Family. 



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

 Flo\Yers perfect or polygamous, in cymes, racemes, or panicles, 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. Gynoecium of 2 more or less united 

 carpels. Fruit 2 nutlets with wings (samaras). 

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



cious. with a disk. " 1. Acer. 



Leaves with pinnately compound blades : flowers dioecious, without a disk. 2. Rulac. 



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



compound. Flowers polygamous-dioecious. Stamens mostly 8. Samaras 2 



together. — Spr. — Maple. 



Flower-clusters expanding before the leaves, not drooping. 



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



Petals present : ovary glabrous. 



Leaf -blades prominently and sharply lobed, the lobes prom- 

 inently toothed: samaras mostly less than 3 cm. long. 2. A. riihrum. 

 Leaf-blades shallowly lobed, the lobes shallowly toothed : 



samaras mostly over .3 cm. long. 3. A. caroliniannm. 



Flower-clusters expanding with the leaves, drooping. 4. A. floridanum. 



1. A. saccharinum L. Tree rarely 36 m. tall, the bark flaky at maturity, gray, 

 or that of the twigs reddish-brown: leaf -blades about as long as broad, 10-15 

 cm. long, with 3-5 prominent incised lobes longer than the body, silky when 

 young, glabrate, bright-green above, glaucous or silvery-white beneath, trun- 

 cate or cordate at the base: calyx greenish or yellowish: samaras 5-6 cm. long, 

 tomentose, or glabrate at maturity, green, at length widely spreading. 



The SiLVER-M.\PLE grows in the Apalachicola river swamps in northern Florida. 

 The pale-brown heart-wood is close-grained, rather light, and brittle. Also known 

 as Soft-maple. (Cont.) 



2. A. rubrum L. Tree sometimes 35 m. tall, the bark dark-gray and fissured 

 on the trunk, smooth and pale or white-gray on the branches: leaf -blades com- 

 monly broader than long, bright-green above, light-green or pale beneath, 

 shallowly but prominently 5-lobed, rather evenly serrate, cordate at the base: 

 flower-clusters red or yellowish: sepals nearly distinct: petals narrower than 

 the sepals: samara- wings diverging at about 45 degrees, commonly red, 1.5- 

 2.5 cm. long. 



The Red-maple grows In swamps in northern Florida and the adjacent parts 

 of the peninsula. The light-brown heart-wood is close-grained, heavy, and hard, 

 but weak. (Cont.) 



3. A. carolinianum Walt. Tree usually smaller than A. nibnim, the bark 

 often shaggy in age: leaf -blades commonly longer than broad, dark-green 

 above, glaucous or white beneath, shallowly and bluntly 3-lobed near the apex, 

 or merely coarsely toothed: samara-wings converging or slightly diverging, 

 larger than those of A. ruhrum, commonly 3-4 cm. long. 



The CAEOLiNA-^rAPLE grows in river-swamps and low grounds in northern 

 Florida and the upper half of the peninsula. The wood is similar to that of 

 A. ruhrum. (Cont.) 



4. A. floridanum (Chapm.) Pax. Tree rarely over 18 m. tall, the bark rather 

 close, but rough in age, chalky- white : leaf-blades rather broader than long, 

 5-6 em. broad, with 3-5 blunt few-toothed lobes about as long as the body, 



Trees of Florida 5. 



