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Many species of cactus have long, sharp spines, like this Opuntia. A cactus (pl.: cacti, cactuses, or less commonly, cactus) [3] is a member of the plant family Cactaceae (/ kækˈteɪsi.iː, - ˌaɪ /), [a] a family comprising about 127 genera with some 1,750 known species of the order Caryophyllales. [4] The word cactus derives, through Latin ...
Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Saguaro spines. The spines on a saguaro are extremely sharp and can grow to 7 cm (3 in) long, [7] and up to 1 mm (1 ⁄ 32 in) per day. When held up to the light or bisected, alternating light and dark bands transverse to the long axis of spines are visible. These bands have been correlated to daily growth.
Opuntia, commonly called the prickly pear cactus, is a genus of flowering plants in the cactus family Cactaceae, many known for their flavorful fruit and showy flowers. [1] Cacti are well-adapted to aridity; however, they are still vulnerable to alterations in precipitation and temperature driven by climate change. [2]
Opuntia maxima Mill. Opuntia paraguayensis K.Schum. Opuntia ficus-indica, the Indian fig opuntia, fig opuntia, or prickly pear, is a species of cactus that has long been a domesticated crop plant grown in agricultural economies throughout arid and semiarid parts of the world. [3] O. ficus-indica is the most widespread and most commercially ...
The Flagellation of Christ, in art sometimes known as Christ at the Column or the Scourging at the Pillar, is an episode from the Passion of Jesus as presented in the Gospels. As such, it is frequently shown in Christian art, in cycles of the Passion or the larger subject of the Life of Christ. Catholic tradition places the Flagellation on the ...
Fouquieria splendens (commonly known as ocotillo / ɒ k ə ˈ t iː j oʊ / (Latin American Spanish:), but also referred to as buggywhip, coachwhip, candlewood, slimwood, desert coral, Jacob's staff, Jacob cactus, and vine cactus) is a plant indigenous to the Mojave Desert, Sonoran Desert, Chihuahuan Desert and Colorado Desert in the Southwestern United States (southern California, southern ...
A dendritic spine (or spine) is a small membranous protrusion from a neuron's dendrite that typically receives input from a single axon at the synapse. Dendritic spines serve as a storage site for synaptic strength and help transmit electrical signals to the neuron's cell body. Most spines have a bulbous head (the spine head), and a thin neck ...