Honey locust thorn
Rosa thorns
Rose thorns
Honey locust thorn, light micrograph
Archduke butterfly caterpillar
Long-horned orb-weaver spider
Sea urchin
Heart shaped cactus
Thorn of an agave, close-up
Cactus Facheiroa ulei abstract
Mammillaria geminispina cactus
Euphorbia officinarum subsp. echinus
Sweet chestnuts (Castanea sativa)
Houseleek (Sempervivum 'Blue Boy')
Thorn apple (Datura stramonium) seed pod
Detail of Cardon Cactus (Pachycereus Pringlei)
Cactus spines
Bramble stem, foliage and root system
Eryngium 'Dove Cottage Hybrid'
Parodia herteri cactus
Gymnocalycium stenopleurum cactus
Gymnocalcyium horstii cactus
Parodia cactus and succulents
Blue Agave (Agave tequilana)
Slender candelabra euphorbia (Euphorbia avasmontana)
Succulent spiny spurge (Euphorbia grandicornis)
Eryngium x tripartitum flowers
Cactus, Epithelantha micromeris
Holly (Osmanthus heterophyllus)
Houseleek (Sempervivum montana)
American sweetgum (Liquidambar styraciflua) fruit
Chilean Rhubarb (Gunnera manicata)
Thorn apple seed pod
Ceiba;name of a genus of many species of large trees found in tropical areas;including Mexico;Guatemala;Central and South America
Cactus plants
Cactus plant
Fox-tail agave (Agave attenuata)
Acacia thorns
Sea holly
Blessed thistle (Cnicus benedictus)
Pest control
Sea holly (Eryngium giganteum)
Pineapples (Ananas comosus)
Century plant leaves
Spurge (Euphorbia canariensis)
Castor oil fruits (Ricinus communis)
Teasel flower head
Polaskia chichipe cactus
Acacia flowers (Acacia karoo)
Cherry laurel (Prunus laurcocerasus)
Calliandra haematocephala
Cactus in flower
Dried teasel abstract
Centaurea sphaerocephala flower
Bramble (Rubus sp.) branch, X-ray
Teasel (Dipsacus sylvestris)
Pochote tree (Pachira quinata), Oaxaca, Mexico
Ripe sloes (Prunus spinosa)
Wind sculpted hawthorn tree (Crataegus monogyna)
Beech (Fagus sylvatica)
Cactus plant spines
Alluaudia procera spines and leaves
Cacti
Prickly pear cactus, Opuntia ficus-indica
Prickly pear cactus (Opuntia sp.)
Thistle flower
Fresh green succulent plants in garden
Sweet chestnut
Carline thistle
Acacia karoo thorns
Cold frame to protect plants from weather and pests
Lythrum salicaria 'Fire Candle'
Orchid primrose (Primula vialii) flowers
Veronicastrum virginicum 'Fascination'
Astilbe chinensis 'Purpurlanze'
Delphinium 'Blue Tit' flowers
Redcurrant bush galled by blister aphids
South African porcupine
Cabbage thistle (Cirsium oleraceum)
Spear thistle flower
Cactus variety
Close-up of cactus plant, Yelapa, Jalisco, Mexico
Close-up of thorns on a spiked plant, San Miguel de Allende, Guanajuato, Mexico
Cactus (Winterocereus aureispina)
Gorse (Ulex europaeus), Pembrokeshire, Wales, UK
London plane (Platanus ラ hispanica) fruit
Balm of Gilead (Cedronella canariensis) stem
Prickly pears (Opuntia ficus-indica)
Saguaro cactus
Cactus
Alluaudia procera tree
Cacti garden
Flowering cactus (Cleistocactus sepium)
Aloe vera
Teasel seed head
Thorny plant stalk
Cactus against a clear blue sky
Close-up of cactus
Peacock butterfly caterpillars
Prickly pear (Opuntia ficus-indica)
Venus flytrap leaf, SEM
Hand covering blueberry bush with netting
Young vegetable plants growing in tubes
Venus flytrap (Dionaea muscipula)
Plant trichome, light micrograph
Star cactus (Astrophytum ornatum)
Echinopsis smrziana
Thornapple seeds
Holly leaves
Goosegrass leaf, SEM
Stachys recta calyx, light micrograph
Cabbage palm (Cordyline australis) in fleece for protection
Pumpkin seedlings
Puncture vine (Tribulus terrestris)
Yong Indian crested porcupine
Overlapping rose thorns, X-ray
Thorn, extreme close-up
Ball cactus (Parodia magnifica)
Aylostera 'Apricot Ice'
Thorn apple on white background
Cotton thistle (Onopordum acanthium)
Spear thistle (Onopordum sp.)
Lava cactus
Agave Plant
Caterpillar
Bee sting
Close up of thorns of plant from agave species
Carnivorous plant leaf scales, SEM
Cleistocactus cactus
Alluaudia procera leaves
Didieriaceae thorns
Mammillaria zeilmanniana
Flowering cactus plant
Mammillaria spinosissima in flower
Sceptrum banksia (Banksia sceptrum)
Aloe vera flowers
Venus flytrap leaves, SEM
Sunflower pollen, SEM
Flower pollen
Raptor perched in the top of a thorny acacia tree
Blackstart in a tree
Spiny bush cricket
Hedgehog cactus (Echinocereus sp.)
Echeveria plant
Robin's pincushion galls
Thorns of an agave
Ferocactus cactus
Marigold pollen grain, SEM