Some weeds only have thorns or spines at leaf nodes. Burs.— Many seeds and fruits bear spines, hooks, and hairs, which adhere to the coats of animals and to clothing. They all are related to anti-herbivore defense mechanisms of plants. 1998.--An analysis of the flowering plant flora of a lowland moist forest in central French Guiana reveals 25 species with adaptations for epizoochorous dispersal by barbs, hooks, or spines (stick-tights). Explosions in fruits literally refer to bursting with all its energy. Buy. Beginners' botany. Several weed species produce seeds with barbs, hooks, spines, and rasps that cling to the fur of animals or to clothing and then can be dispersed to long distances. Some fruits and seeds have hook-like projections, bristles, hairs, spines, which helps them to get attached to the animal skin, hoofs or body parts and after being dispersed, they are dropped off. Some species, notably Xanthium spinosum, are also very thorny with long, slender spines at the leaf bases.. Learn more about seed characteristics, dispersal, and germination. Cactus spines come in a wide variety of lengths, widths, textures, and stiffnesses. You can identify the weed easily at an early growth stage by the spines at leaf bases and the characteristic heart-shaped seed leaves or cotyledons. Fruits of Tribulus, Achyranthes are provided with spines and those of Xanthium, Urena etc., bear curved hooks. 811. rather thin high ribs, straight spines and yellow flower (20 ... large plants with hooked spines (20 st/seeds/samen) $1.72. Ferocactus wislizenii IDD 1754. Ingestion of fleshy fruits by animals with the seeds deposited in feces (droppings). Seed - Seed - Dispersal by animals: Snails disperse the small seeds of a very few plant species (e.g., Adoxa). Earthworms are more important as seed dispersers. Curious nature lovers regularly find unusual plants poking up in their own yards or those of their friends and family. The radial spines are thin, flexible and often white to reflect sunlight away from the plant. The flower heads are of two types; One, in short terminal branches, produces only pollen. The leaves are spirally arranged, with deeply toothed margins. Cacti have many of the same parts as ordinary plants but in a form better suited for growing in dry regions. Seed Dispersal by Explosions. Some fruits have spines and hooks, which … From early summer to mid-fall, the 1- to 3-foot high coastal, or field, sandbur (C. spinifex) produces purple burrs with up to 40 hooks each. More than wind and water, animals and birds can make valuable allies who can help disperse seeds. a. Hooks. Trees, vines, shrubs, perennials and annuals all include thorn-bearing representatives. Plants With Spiny Seedpods & Flowers. Latin name: Geum urbanum; Height: 1 foot (30 cm) Notes: A perennial weed with yellow flowers. Adaptations of the fruits with hooks and spines to cling to the fur or feathers of animals passing by. In order to answer questions on Seed Dispersal correctly, your child needs to know how to link the characteristics of the fruit/seed with the respective seed dispersal method. In this case, as the fruits get ripened, it shoots out its seeds into the external environment. Ferocactus wislizenii IDD 1754. Academic Partner. Kinds of Plants With Thorns. These adaptations help cacti store water more efficiently by decreasing water loss. Upright southern sandbur (C. echinatus) has erect, 2- to 6-inch leaves. Method 1: Wind As fruits/seeds dispersed by wind are light and have wing-like structures or feather-like structures, they have a larger exposed surface area in contact with the air. Its October burrs have 40 to 60 spines. This type of seed dispersal is mainly seen in those plants having pods. The central spines are usually long, strong, rigid, and brightly colored to deter grazers. Ask questions, doubts, problems and we will help you. Later on, these drop off somehow or other and are thereby dispersed. 9643. very big plants with red robust spines! Cockleburs belong to the enormous sunflower family (Asteraceae), the largest plant family with approximately 24,000 species.The seeds are typically enclosed in a one-seeded fruit, called an achene, which is often airborne with a plume of silky hairs resembling a miniature parachute. Sticky fruits and seeds. However, a multitude of flowering plants have thorns or spines, and many of these make lovely additions to gardens, borders and other landscaping projects. Answer to: Four of the five answers listed below are adaptations to aid in dispersal of fruit. Small and light seeds- Since these seeds are light in weight … Ferocactus echidne. This aids the dispersal of seeds as they catch in the fur of passing animals. 469) so that if an animal grazes or brushes against them, these stick to the animal’s body or clothing. Spines are obtained from leaves and prickles are derived from the epidermis. They have no stomata, no guard cells, no mesophyll parenchyma, no xylem, no phloem. In plant morphology thorns, spines and prickles are all similar type of structures identified by their sharp and stiff ends. or own an. And though most are not poisonous, some palms drop vast amounts of seeds that can create other minor hazards, from a rotting, slippery mush, or a ball-bearing-covered sidewalk, to potential indigestible foreign bodies in pets and children, who sometimes eat the fruits and carelessly swallow the hard seeds inside whole. 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