Thorn apple (Datura stramonium) seed pod
Thorn apple seed pod
Vanilla pod, SEM
Love in the mist seed head (Nigella sp.)
Beech (Fagus sylvatica)
Carline thistle
Calabar beans
Yew tree berries
Honey locust thorn
Century plant leaves
Castor oil fruits (Ricinus communis)
Rose thorns
Polaskia chichipe cactus
Sea holly (Eryngium giganteum)
Yew berries
Larkspur (Consolida regalis)
Deadly nightshade (Atropa belladonna)
Field pennycress seed pod
Teasel seed head
Shepherd's purse seed pod
Carline thistle (Carlina vulgaris)
Sea holly
Blessed thistle (Cnicus benedictus)
Fox-tail agave (Agave attenuata)
Ceiba;name of a genus of many species of large trees found in tropical areas;including Mexico;Guatemala;Central and South America
Spurge (Euphorbia canariensis)
Cactus plants
Cactus plant
Cactus spines
Teasel flower head
Pineapples (Ananas comosus)
Thorn apple (Datura stramonium)
Majidea sp. seed pod
Rubber vine seed pod
Cardiospermum halicacabum seed pod
Tobacco plants
Tobacco flowers and leaves
Deadly nightshade berries
Tobacco plant (Nicotiana tabacum)
Jersey lily (Amaryllis belladonna) flowers
Soya bean pods
HIV particle, artwork
HIV viral capsid, artwork
Acacia thorns
Tobacco (Nicotiana alata) leaf, SEM
Sweet chestnuts (Castanea sativa)
Carnivorous plant leaf scales, SEM
Alluaudia procera leaves
Alluaudia procera tree
Didieriaceae thorns
Mammillaria zeilmanniana
Flowering cactus plant
Flowering cactus (Cleistocactus sepium)
Aloe vera
Flower pollen
Bramble stem, foliage and root system
Houseleek (Sempervivum montana)
Blue Agave (Agave tequilana)
Balm of Gilead (Cedronella canariensis) stem
Thorn, extreme close-up
Henbane flowers
Tobacco flowers
Poison bulb plant
Bittersweet (Solanum dulcamara)
Ragwort (Senecio jacobaea)
Winter aconite (Eranthis hyemalis)
Oolong tea
Jersey lily (Amaryllis belladonna) flower
Spear thistle flower
Cotton thistle (Onopordum acanthium)
Spear thistle (Onopordum sp.)
Thistle flower
Bush lily (Clivia miniata) inflorescence
Flax, Linum usitatissium
Okra (Abelmoschus esculentus)
Tetrapleura tetraptera fruit
Prickly pear (Opuntia ficus-indica)
Willow herb seed pod, SEM
Burl on a sessile oak (Quercus petraea)
Honesty (Lunaria) seed pods
Daffodil (Narcissus sp.) seed pods
Comfrey petals, SEM
Japanese water iris seed pods (Iris sp.)
Carob tree seed pods (Ceratonia siliqua)
Pea pod
Caper spurge (Euphorbia lathyris) seed pods
Vanilla orchid pods
Honey locust thorn, light micrograph
Aloe vera flowers
Venus flytrap leaf, SEM
Sweet chestnut
Holly (Osmanthus heterophyllus)
Venus flytrap (Dionaea muscipula)
Close-up of thorns on a spiked plant, San Miguel de Allende, Guanajuato, Mexico
Alluaudia procera spines and leaves
Prickly pear cactus, Opuntia ficus-indica
Holly leaves
Plant trichome, light micrograph
Centaurea sphaerocephala flower
Cactus against a clear blue sky
Thorny plant stalk
Close-up of cactus plant, Yelapa, Jalisco, Mexico
Close-up of cactus
Close up of thorns of plant from agave species
Agave Plant
Venus flytrap leaves, SEM
Saguaro cactus
Cactus plant spines
Cactus
Cleistocactus cactus
Cacti
Cacti garden
Sunflower pollen, SEM
Prickly pears (Opuntia ficus-indica)
Parodia herteri cactus
Gymnocalycium stenopleurum cactus
Gymnocalcyium horstii cactus
Parodia cactus and succulents
Eryngium 'Dove Cottage Hybrid'
Slender candelabra euphorbia (Euphorbia avasmontana)
Succulent spiny spurge (Euphorbia grandicornis)
Eryngium x tripartitum flowers
Bramble (Rubus sp.) branch, X-ray
Pochote tree (Pachira quinata), Oaxaca, Mexico
Cactus, Epithelantha micromeris
Peacock butterfly caterpillars
Cactus (Winterocereus aureispina)
Teasel (Dipsacus sylvestris)
Water chestnut seed pod
Cabbage thistle (Cirsium oleraceum)
Acacia flowers (Acacia karoo)
Echium vulgare
Seed pod
Bottle tree seed pods
Rosary pea seed pods
Paeonia suffruticosa seed pods
Winter aconite in UV light
Traveller's palm seed pods
Devil's claw seed pods
Sundew leaf with glandular hairs, light micrograph
Thorn apple plants (Datura stramonium)
Lipstick tree seed pod and seeds
Squirting cucumber showing yellow seeds in a green pod
Stachys recta calyx, light micrograph
Sceptrum banksia (Banksia sceptrum)
Fresh green succulent plants in garden