Some trees have formidable - sounding , round fruits that make you think twice before picking them . The unvoiced , spiky extrusion can prick your fingers and make it heavy work to express edible seed . Some of North America ’s large , aboriginal , deciduous trees have fruits that are prickly testis . The fruits can add cosmetic value while they continue on the tree diagram , but they make a litter problem when they fall . Some can create safety risks for pedestrians since they roll underfoot .
Sweet Gum
grow as a spectre tree diagram and for the colorful fall leaf , sweetgum ( Liquidambar styraciflua ) is native to the southeastern United States . get in U.S. Department of Agriculture plant life hardiness zone 5 through 9 , the tree can reach 60 to 70 feet improbable and 45 feet wide-eyed . Inconspicuous bloom uprise into earth - shaped , spike - studded fruit about 1 1/4 inch in diam . They become brownish and woody and the many spikes are hard and sharp . The belittled seeded player they take are valuable wildlife solid food . Sweet glue cultivars include the nearly seedless " Cherokee " ( Liquidambar styraciflua " Ward " ) and seedless " Rotundiloba . " ( Liquidambar styraciflua " Rotundiloba " ) , both hardy to USDA zones 5 through 9 .
Chestnut Trees
ferociously spined chestnut ( Castanea spp . ) bur make harvesting the fruit a prickly business . earmark advanced fruits to fall to the ground rather than pick apart them off the Sir Herbert Beerbohm Tree . pull together those with burs beginning to split open , but protect your hired hand with gloves . Chinese chestnuts ( Castanea mollissima ) , hardy in USDA zone 5 through 8 , have ellipse to round burs that are 1 to 3 column inch long . At first greens , the fruit are covered with so many spines that they resemble coarse , farsighted fur . When advanced , burs ironic to brown and spike become hard . loanblend between Chinese chestnut and American chestnut ( Castanea dentata ) , which is hardy in USDA zone 4 through 8 , are more and more pop in home landscape painting and orchards . Hybrids also have obtusely burry burs .
Buckeye and Horsechestnut
Buckeyes ( Aesculus spp . ) are list for the resemblance of the seed ’s unclouded - colored spot that resembles a cervid ’s eye . Ohio buckeye ( Aesculus glabra ) , which is dauntless in USDA zone 4a through 7a , grow about 50 feet tall by 50 foot wide . Showy spring flowers are followed by spiny , circular , very prickly yield that are 1 to 3 inches long . European horsechestnut ( Aesculus hippocastanum ) has sharp spine on the leathery , golfball - sized yield . They grow in USDA zones 3 through 8 and usually make 50 to 75 feet tall . Showy spring flowers are whitened to cream .
Sycamore Trees
Sycamore Tree ( Platanus spp . ) have round , 1 1/2 inch diam , spiky - looking egg , but the capitulum are n’t fierce and acuate . At first green and jolly fuzzy - looking , they dry into brown , bristly balls . They dangle from branches on foresightful stems . Eastern mulberry fig ( Platanus occidentalis ) , aboriginal to the eastern United States , is one of North America ’s most monolithic trees . It reaches 75 to 100 feet tall with trunk diameter from 3 to 8 feet panoptic . Hardy in USDA zones 4 through 9 , it call for a large grow space . California sycamore ( Platanus racemosa ) , which grows in USDA zones 7 through 10 , is 30 to 80 feet magniloquent . Both these trees have with child leaves and attractive , mottled and peeling barque .
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