Raphides in EpipremnumDevil's ivy (600x magnification)
Raphides (/ˈræfɪdiz/RAF-id-eez; singular raphide/ˈreɪfaɪd/RAY-fyde or raphis) are needle-shaped crystals of calcium oxalate monohydrate (prismatic monoclinic crystals) or calcium carbonate as aragonite (dipyramidal orthorhombic crystals), found in more than 200 families of plants.
Both ends are needle-like, but raphides tend to be blunt at one end and sharp at the other.
processed to make them edible, however, the raw plants contain raphid or raphide crystals of calcium oxalate along with other irritants (possibly including...
characteristics that unite monophyletic groups of taxa); Calcium oxalate raphides Absence of vessels in leaves Monocotyledonous anther wall formation* Successive...
needle-shaped crystal of calcium oxalate found in some plants. It is a form of raphide. This disambiguation page lists articles associated with the title Styloid...
climates as well as subtropical and tropical climates. Fishtail palms contain raphides. Fishtail palm at Bhopal Fishtail palm at Bhopal Fishtail palm flower in...
tuberous, and the leaves nearly always contain calcium oxalate crystals or raphides, in varying degrees. The leaves can vary considerably from species to species...
vary in their toxicity levels. They contain calcium oxalate crystals in raphide bundles, which are poisonous and irritating. The sap may cause skin irritation...
tongue (also used for Sansevieria species) refer to the poisoning effect of raphides, which can cause temporary inability to speak. Dieffenbachia was named...
Myrmecodia). The plants usually contain iridoids, various alkaloids, and raphide crystals are common. The leaves are simple, undivided, and entire; there...
them together, such as a lack of mycorrhizal associations and tapetal raphides. Estimates differ as to when the Commelinales evolved, but most suggest...
inflammation, and ulcers. The leaves contain calcium oxalate crystals and crystal raphide, and should not be consumed by humans. Trillium erectum is cultivated as...
form. In bundles they are known as druse and as crystals they can be of raphide [needle] form. When the end of an idioblast is broken the crystals or other...
though this is rarely done for giant taro as it contains higher amounts of raphides which cause itching. The reconstructed word for giant taro in Proto-Austronesian...
though this is rarely done for giant taro as it contains higher amounts of raphides which cause itching. The reconstructed word for giant taro in Proto-Austronesian...
quinquefolia do not produce urushiol, the sap within the leaves and stem contains raphides (needle-shaped crystals of calcium oxalate) which can puncture the skin...
bundles completely encircling the fibrous cylinder, and does not have raphide-containing idioblasts in the foliar margin, unlike B. capitata (Sant'Anna-Santos...
poisonous; the culprits are needle-shaped crystals of calcium oxalate called raphides, which can cause intense burning, reddening of the skin, irritation, and...
apertures). Fruit capsular or schizocarp. Phytochemistry: Often containing raphides, Specific characteristics which help to distinguish this order include...
among the four, because they were less likely to contain the irritating raphides present in the other plants. Taro is also identified as one of the staples...
plants are toxic, mostly due to trichosclereids (long sharp cells) and raphides. Plants can grow to over 40 m (131 ft) with leaves up to 3 m (10 ft) long...
as much as 0.7% of oxalates in the form of calcium oxalate crystals as raphides. The risk of death, if even possible, is extremely low if ingested by an...
toxic to cats and dogs by the ASPCA, because of the presence of insoluble raphides. Care should be taken to ensure the plant is not consumed by pets. Symptoms...
for humans. Fruits of plants of the Araceae (Arum family) often contain raphides and trichosclereids – needle-like structures of calcium oxalate. In M....
poisonous due to the presence of calcium oxalate crystals in the form of raphides. All parts of the plant are poisonous, typically producing local irritation...
mineral whewellite, forming envelope-shaped crystals, known in plants as raphides. The two rarer hydrates are dihydrate CaC2O4·2H2O, which occurs naturally...
bundles completely encircling the fibrous cylinder, and does not have raphide-containing idioblasts in the foliar margin, unlike B. capitata (Sant'Anna-Santos...
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