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Dendrology Lab Week 2

by: Naomi Hampton

Dendrology Lab Week 2 FORY 3100

Marketplace > Auburn University > forestry > FORY 3100 > Dendrology Lab Week 2
Naomi Hampton
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About this Document

These are the descriptions for the trees covered in week 2 of lab.
Dr. Nancy Loewenstein
Class Notes
dendrology, Trees




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This 14 page Class Notes was uploaded by Naomi Hampton on Thursday August 25, 2016. The Class Notes belongs to FORY 3100 at Auburn University taught by Dr. Nancy Loewenstein in Fall 2016. Since its upload, it has received 7 views. For similar materials see Dendrology in forestry at Auburn University.

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Date Created: 08/25/16
bigleaf magnolia Magnoliaceae Magnolia macrophylla  Leaves: deciduous, simple, alternate, blades heart-shaped or lobed at base, 20-30in long, upper glabrous, dark green, lower glaucous, pubescent  Twigs: stout, brittle, densely tomentose when young  Buds: terminal winter buds bluntly pointed, flattened, 1 ¾-2in long, covered w/white hairs, pith large, homogenous  Flowers: bisexual, creamy white, 10-12in diameter, petals frequently w/conspicuous purplish blotches near base inside  Fruit: cone-like aggregate of follicles, ovoid to round, densely pubescent, 2 ½-3in long  Bark: thin, gray, smooth, forming small inconspicuous plates on older trees  Range: mesic, wooded ravines, isolated populations in Piedmont/upper Coastal Plain, throughout most of Southeast, east of Mississippi River  Site:  Form: largest simple leaves and flowers of dicotyledonous native trees, seldom over 50ft tall and 8-10 in diameters, short-lived black locust Fabaceae Robinia pseudocacia  Leaves: deciduous, pinnately compound, alternate, 8-14in long, 7-21 leaflets, ½-2in long, elliptical or oval, entire, tips blunt or notched, sometimes short bristle, glabrous, bases of petioles swollen  Twigs: zigzag, stout, paired stipular spines at each node, dark brown  Buds: terminal bud absent lateral buds hidden beneath leaf scar  Flowers: white, showy, dangling in racemes 4-6in long, fragrant  Fruit: legume, brown, 2-4in long, flat  Bark: gray-brown to almost black, thick, deeply furrowed into net-like ridges  Range: moist mountain slopes to drier rocky soils, native to mountains, widely planted, naturalized throughout Piedmont, occasionally in coastal plain  Site:  Form: short-lived, 40-60ft tall, occasionally more than 90ft tall, forked twisted, or crooked trunks, broad, irregular open crown black willow Salicaceae Salix nigra  Leaves: deciduous, simple, alternate, blades lanceolate, about 7in long, ¾ in wide, tips long acuminate, bases wedge-shaped, margins finely serrate, teeth tipped w/red glands, lower surfaces not glaucous, stipules wing-like  Twigs: brittle, glabrous, slender, purple to green  Buds: terminal bud absent, lateral buds small pointed, flattened against twig, cap-like  Flowers: unisexual, small, lacking petals/sepals, 3-4in long  Fruit: capsule, 2-valved, ovate, < ¼ in diameter  Bark: light to dark gray or almost black, moderately fissured, forms forking ridges w/long scaly plates  Range: floodplains, stream banks, marshes, low, moist areas throughout eastern North America  Site:  Form: becomes tree in some swampy areas, 80-100ft tall, rarely 12-18in diameter, shrubby, rapid but short lived boxelder Aceraceae Acer negundo  Leaves: deciduous, pinnately compound, opposite, leaflets 3-7, leaflets 2-4in long, 1 ½-2 ½ in wide, coarsely toothed or slightly lobed margins, lower pubescent  Twigs: greenish to purple w/white bloom, glabrous, new twigs green  Buds: terminal bud pointed, 1/8-1/4in long, reddish, woolly, slightly stalked, lateral buds nearly globose  Flowers: unisexual, ¼ in long, staminate in long-stalked cluster, pistillate in long-stalked pendulous racemes  Fruit: double samara, paired, wings 1-2in long, numerous in pendulous racemes  Bark: gray-brown and smooth on young trees, develop shallow fissures w/narrow, often rounded ridges w/age  Range: streams, floodplains, edges of swamps, moist sites, less common in Atlantic Coastal Plain  Site:  Form: short-lived, usually <50ft, sometimes reaching 75-80ft and more than 2ft diameter, short trunk w/numerous epicormics branches Callery pear (‘Bradford Pear’) Rosaceae Pyrus calleryana  Leaves: deciduous, alternate, simple, finely crenate to wavy, clustered on stout spur shoots, blade length 4-6cm, width 4-6 cm, somewhat coriaceous, broadly ovate to nearly orbicular, crenate margin  Twigs: usually stout, gnarled, rough from bud scale scars, thorns  Buds: large, 1.5cm, glabrous  Flowers: --  Fruit: spherical  Bark: --  Range: --  Site:  Form: small to medium sized tree, up to 15m tall, branched above 1.5m Chinese lespedeza Fabaceae Lespedeza cuneata  Leaves: 3 leaflet (trifoliate), gray-green, oblanceolate, linear leaves, smaller upward, blunt tipped  Twigs: gray-green w/lines of hairs  Buds: --  Flowers: 2-3 in clusters whitish w/purple marks along stem  Fruit: pods 3-4mm long  Bark:--  Range: introduced from Asia eastern US, except DL and NJ  Site:  Form: single to several, wand-like branched above mid-plant, leaning and spreading eastern baccharis, groundsel tree Asteraceae Baccharis halimifolia  Leaves: alternate, spiraling, tardily dehiscent to evergreen leathery, diamond becoming obovate to elliptic upward, short petioles, course blunt teeth above mid-leaf, margins becoming entire, upward surfaces green to grayish-green  Twigs: slender, dark green and ribbed w/slightly sticky resin, become light green  Buds: --  Flowers: dioecious, terminal branched clusters of small heads  Fruit: achene, pale ribbed, topped with white bristles  Bark: green w/tan scaly stripes, becoming tan and slightly fissured, pith white and solid  Range: open forest, disturbed places  Site:  Form: bushy, branched shrub to about 4m tall flowering dogwood Cornaceae Cornus florida  Leaves: deciduous, simple, opposite, blades ovate to broadly elliptical, 3-6 in long, bases rounded, veins curving to run parallel w/margins, margins entire, sparsely pubescent, strings inside leaf hold it together  Twigs: slender, green or purplish, small dark lenticels, leaf scars nearly encircling twig, V- shaped  Buds: terminal leaf buds pointed, appear as 2 valvate scales, lateral buds small, enclosed by petiole  Flowers: bisexual, yellowish green, 1/4 in across, 4 petals, tight clusters surrounded by 4 large, showy , white, petal-like bracts  Fruit: drupe, shiny red, elliptical, calyx lobes persistent  Bark: dark brown, rough, broken into small rectangular plates at early age, older trees breaking into square, scaly blocks  Range: understory tree, well-drained, upland soils, deep, mesic soils along streams, lower slope throughout southeast and eastern U.S.  Site:  Form: 30ft tall, frequently wider than tall, distinctive, low, upturned branches, flat-topped crown redbud Fabaceae Cercis canadensis  Leaves: deciduous, simple, alternate, blades broadly ovate, 3-5in diameter, tips acute, bases heart-shaped, margins entire, palmately veined, upper glabrous, lower pubescent to glabrous, petioles swollen, stipules small, papery  Twigs: zigzag, slender, light brown to reddish; lenticels small, horizontal  Buds: terminal bud absent, lateral buds often superposed, 1/8in long or less, ovoid, 2 scales on leaf buds, 8 scales preformed flower buds  Flowers: bisexual, petals purplish pink, 1/8in long, 4-8 per fascicle, produced on twigs of previous year  Fruit: legume, flat, oblong, 3-4 in long, stalked, dark brown  Bark: dark gray to brown, slightly furrowed, breaking into thin scaly plates  Range: wide range of sites, along streams, fertile moist bottomlands, drier slopes and ridges, southeast  Site:  Form: 35-40ft tall, short trunk, numerous upright spreading branches river birch Betulaceae Betula nigra  Leaves: deciduous, simple, alternate, 2-ranked, blades triangularly ovate, bases truncated or angularly wedge-shaped, margins doubly serrate, lower densely pubescent when young, glabrous or pubescent on veins mature, petioles densely pubescent  Twigs: slender, zigzag, red-brown, lenticels horizontally elongated  Buds: terminal bud absent, winter lateral buds ¼ in long, ovoid, acute, 3 visible scale, usually hooked  Flowers: unisexual, tiny  Fruit: nutlets ¼ - ½ in long, ciliate wings, upright cone-like clusters of pubescent bracts  Bark: reddish to gray-brown, often pinkish, peeling into thin papery layers on young trees older trees darker grayish brown, shreddy plates  Range: floodplain species, streams, rivers, wet bottomlands, southeast  Site:  Form: 60-80ft high, short trunk, forked spreading crown sawtooth oak Fagaceae Quercus acutissima  Leaves: 4-8 in, pointed teeth, oblong to lanceolate, bristle tips, coarse  Twigs: --  Buds: --  Flowers: --  Fruit: acorn tendrils from cap, enclosed in cups w/long, spreading, recurving scales  Bark: deeply furrowed  Range: --  Site:  Form: -- silverbell Styracaceae Halesiia spp.  Leaves: alternate, simple, obovate to elliptical, slender short-petiolate, w/o stipules, blades pinnately veined  Twigs: large twigs tend to be striped, leaf scar crescent to horseshoe shaped, single vascular bundle scar,  Buds: axillary winter buds 2 and superposed  Flowers: pendant, bisexual, radially symmetrical, short racemes 2 to 6 or 7  Fruit: hard, 1-3 seeds, dry, indehiscent, 2- or 4-winged  Bark: finely furrowed, ridges, sloughing in thin narrow plates  Range: shade tolerant, bottomlands  Site:  Form: shrubs or tree greenbriar Smilacaceae Smilax spp.  Leaves: alternate, deciduous or evergreen, often w/3 main veins, netted interveins, shiny green top, duller under  Twigs: --  Buds: --  Flowers: small, trumpet-shaped, small axillary clusters, greenish to yellowish to brownish, dioecious  Fruit: berry, green turning red to blue or black, contain 1-3 seeds  Bark: --  Range: southeast  Site:  Form: thorny vines, climb by tendrils Virginia creeper Vitaceae Parthenocissus quinquefolia  Leaves: alternate, palmately compound, 5 leaflets, leaflets ovate to elliptic to obovate, 4- 15cm long, 5-8cm wide, margins coarsely serrate above middle, pale, soft hairy beneath, larger petioles, pale tan to reddish and finely hairy  Twigs: round in cross-section, nodes frequent and flattened, infrequently branched, pale lenticel dots, branched tendrils opposite leaves of growing shoots  Buds: --  Flowers: tiny flowers in terminal/axillary red branched clusters, 5 petals, yellowish green  Fruit: drupe black to dark blue and white waxy, spherical  Bark: --  Range: native, TX to FL, north to s Canada, west MN  Site:  Form: woody vine, old stems to at least 6cm diameter


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