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Lab 10 Type B
give common name from description
14
Biology
Undergraduate 1
11/14/2010

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Term

Habit: small tree

Leaves: neeles in fascicles of 2, dark green and twisted

Twigs: thin and pliable

Buds: long, light brown, slender, bendable

Bark: thick, grayish-reddish brown outer plates, smooth at top of tree

Reproductive structure: seed cone, small, ovoid, 1-3 inches long, serotinous

Habitat: deep well drained acidic soils, sandy soils along ridges, southeastern coastal plains, xeric sand community

Definition
sand pine
Term

Habit: shrub-small tree

Leaves: alternate, lobed or unlobed, 1-3 lobes, different lobe types on same tree

Twigs: smooth, light green

Bark: dark and furrowed

Fruit: small clustered blue/black fruits, about 1/2 inch long

Habitat: well-drained, sandy soils and in open woodlands, southeastern coastal plains, xeric sand community

Definition
sassafras
Term

Habit: medium-large tree

Leaves: fascicles of 2 (sometimes 3 or more), 15-23 cm long, long sheath, needles tufted at branch ends

Twigs: orange-brown

Buds: silvery-brown, not fringed

Bark: furrowed when young, becoming plated with age, orange-purplish brown outer bark, inner bark ivory

Reproductive structure: seed cone, ovoid-conic, stalked, very lustrous, umbo armed

Habitat: along ponds and streams, moist areas protected from fire, southeastern coastal plains, xeric sand community

Definition
slash pine
Term

Habit: medium tree

Leaves: needles in fascicles of 3 (rarely 4 or 5), 20-46 cm long, tufted at brach ends

Twigs: stout, orange-brown

Buds: large, covered with silvery fringed scales

Bark: rough and black, becoming red and platy, fire resistant

Reproductive structure: seed cone, ovoid, sessile, umbo armed, seeds large

Habitat: well drained sands, tolerates poor wet sites, southeastern coastal plains, xeric sand communty

Definition
longleaf pine
Term

Habit: medium tree with denser crown than other southern pines

Leaves: needles in fascicles of 3 ( sometimes 2), 10-32 cm long

Twigs: yellowish brown, fine tomentum 1st season

Buds: reddish brown, not fringed, not resinous

Bark: dark and scaly, becoming brwon and platy and eventually cinnamon colored, inner bark slate gray

Reproductive structure: seed cone, oviod, sessile, flat, umbo armed with sout triangular prickle

Habitat: wet to dry, lowlands to old fields, southeastern coastal plains, xeric sand community

Definition
loblolly pine
Term

Habit: medium tree, trunk divides early into many arching branches

Leaves: alternate, simple, ovate, doubly serrate, wedge-shaped base

Twigs: reddish brown, pubescent becoming glabrous

Buds: ovoid, acute, chestnut brown, pubescent, hook-tipped

Bark: salmon pink, exfoliating and scaly

Fruit: samara, dispersed in late spring after flood waters recede

Habitat: riverbanks, streamsides, floodplains, southeast coastal plains, riverbottom community

Definition
river birch
Term

Habit: small tree, poorly formed

Leaves: alternate, simple, elliptical, doubly serrate, unbranched veins, blue-green

Twigs: slender, pale green and pubescent becoing dark red then gray and glabrous

Buds: ovoid, square in cross-section, brown with whitish margin, laterals appressed

Fruit: nutlet subtended by a 3-lobed bract in persistent clusters

Habitat: mesic soils best, but tolerant of a wide range of soil types, southeastern coastal plains, riverbottom community

Definition
bluebeech; American hornbeam
Term

Habit: small to medium tree

Leaves: alternate, simple, oval, entire, lustrous, veins divergent, not arcuate, petioles short

Twigs: slender, pith diagramed

Buds: terminal bud dark red, laterals divergent

Bark: long, irregular blocky ridges or wide plates

Fruit: fleshy blue-black drupe on long pedunchle in small cluster, sour

Habitat: dense forests, swampy soils with high water tables, also tolerates upland sites, southeastern coastal plains, riverbottom community

Definition
blackgum; black tupelo
Term

Habit: large tree

Leaves: alternate, simple, broadly ovate, 3-5 lobed with broad and shallow sinuses, margins toothed, pubescent along veins below, petioles stout and hollow at base, encircle bud

Twigs: zigzag, stipular scars encircle twig

Buds: divergent, resinous with caplike scale

Bark: creamy white, green and brown in camo-like pattern, becoming fissured with age

Fruit: multiple of achenes, each with hairy seedcoat on denst brown head with long peduncle

Habitat: floodplains, lake edges, wet soils, southeastern coastal plains, riverbottom community

Definition
sycamore
Term

Habit: medium to large tree

Leaves: alternate, pinnately compound, 9-17 leaflets, sessile or nearly so, lanceolate, serrate, may be slightly pubescent

Twigs: reddish brown with orange lenticels, usually pubescent

Buds: large, valvate, yellowish brown, scurfy

Bark: brown with scaly, interlacing ridges

Fruit: nut in clusters of 3-11, ellipoidal, globose, or pear-shaped, husk green becoming black, split along 4 lines, nuut sweet, brown, slightly ridged

Habitat: bottomlands, southeastern coastal plains, riverbottom community

Definition
pecan
Term

Habit: small in north, larger in south

Leaves: scale-like, decussate, circular glands on back, blue-green turning brown the 2nd year, persistent, in flattened sprays

Twigs: blue green becoming brown

Buds: inconspicuous

Bark: ashy gray to reddish brown, shreddy and fibrous

Reproductive structure: seed cone, spherical and upright, fleshy and bluish purple when mature, becoming brown

Habitat: swamps, wet soils, along streams in dense stands, southeastern coastal plains, riverbottom community 

Definition
Atlantic white-cedar
Term

Habit: medium to large tree with buttressed trunk

Leaves: alternate, simple, palmately lobed (like a star), margin serrate, fragrant when crushed, petioles long

Twigs: moderately stout, gree, orange, or yellowish brown, lenticellate, corky ridges develop after first year

Buds: ovate, lustrous, orange-brown

Bark: grayish brown, deeply furrowed into flaky ridges, exudes liquid

Habitat: moist bottomlands preferred, but adapts well to a wide range of upland sites, southeastern coastal plains, riverbottom community

Definition
sweetgum
Term

Habit: medium tree

Leaves: alternate, simple, spatulate to ovate, entire but may be terminall lobed or pinnately lobed, bristle-tipped, axillary tufts below

Twigs: slender and glabrous

Buds: small and reddish brown

Bark: dark gray, ridges become wider with age

Fruit: acorn, hemispherical, black, often striated, sessile or nearly so, cup scales appressed and tomentose

Habitat: bottomlands, moist uplands, old fields, southeastern coastal plains, riverbottom community

Definition
water oak
Term

Habit: large tree, trunk widely buttressed and fluted

Leaves: deciduous, yellow-green, feathery, appearing 2-ranked

Twigs: green maturing to red-brown, slender

Buds: small, brown, ovate

Bark: fibrous, shallowly furrowed, scaly with age, dark reddish-brwon to gray

Reproductive structure: woody seed cone, globose, purplish brown when mature, 4-sided scales, seeds resin coated, triangular with thick, warty coats

Habitat: seasonally flooded sites, blackwater rivers, swampls, lake margins, southeastern coastal plains, riverbottom community

Definition
bald-cypress
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