On a walk around Ponkapoag Pond during the annual August stay at our AMC Ponkapoag cabin, I finally took a look. What a cool seed dispersal mechanism, eh!? But it isn’t jewelweed’s soothing gel or exploding seed capsules that have been distracting me lately. Once established, a patch of jewelweed will maintain itself through annual seed production. Through the action of plant hormones, the seeds become dormant, a state that inhibits growth. Facebook. The capsule walls are a combination of cells under high turgor pressure combined with … In many areas of the country grows a little plant that has remarkable medicinal qualities: jewelweed. I discovered this plant is a Jewelweed or a Touch Me Not plant. Sign Up . Friends for the Abbott Marshlands The Friends for the Abbott Marshlands are a grassroots organization of volunteers dedicated to enhancing appreciation and protection of the Abbott Marshlands. We never share your email address . Hayashi et al 2009 jewelweed seed dispersal.pdf The mechanics of explosive seed dispersal in orange jewelweed (Impatiens capensis).pdf Available via license: CC BY-NC 2.0 Seeds. It happens so fast, so it's hard to see. Jewelweed is also known as spotted touch-me-not – spotted because the flowers have dark spots on them and touch-me-not because if you touch the ripe seed pods, the seeds will fly out at high speed up to a metre distant. However, I have seen it grow in full sun too, and full shade. Sandburs are native to warm sandy areas of North America, North Africa, Asia, Europe, and the South Pacific. Unfortunately low-density seeds make poor projectiles in comparison with the small, dense seeds … The seed pods expand in size, building up pressure over time. Root. Email or Phone: Password: Forgot account? Violets enlist the aid of ants and slugs to carry away their seeds and release them where they can grow. About. Uh we'll be able to see the seeds on we'll get you close up of one. Jewelweed seed capsules resemble those of other impatiens species. It's jewelweed (aka touch-me-not) seed popping season! Jewelweed seed. Press alt + / to open this menu. Play media. All it takes is a gentle touch of your finger or an animal moving among the plants to help spread those seeds far and wide! Long-distance seed movements in jewelweed are achieved using secondary dispersal via water (Trewick and Wade, 1986; Perrins et al., 1993; Tabak and von Wettberg, 2008). Distribution. This is a really unique means of seed dispersal! Sections of this page. ppt, 876 KB. I've long known that jewelweed (Impatiens capensis) aka "touch-me-not" does ballistic seed dispersal--probably giving it its other common name. This fascinating manner of seed dispersal is called “ballistichory”, referring to the way in which the seeds act as projectiles. The plants can be used for forage when young, but they later form rounded sharp-spined burs that The four types of seed dispersal are through expulsion, animal dispersal (such as flower ovary consumption), wind (dandelions), and water (coconuts). I take that back because the plate is also known as touch me and so you don't want to touch the seed or explodes and that's how it reproduces and throws here and there several feet away. This is an amusing and fun way to teach kids about this exciting plant while assisting with seed dispersal. Description. But I'd never paid enough attention to look for the plant when it had fruit. The common name jewelweed probably refers to the way water beads up on its leaves. Here is a link: Jewelweed Pods Exploding. The species name glandulifera comes from the Latin words glándula meaning 'small gland', and ferre meaning 'to bear', referring to the plant's glands. Kids love to help with the seed dispersal of jewelweed, and having the capsule twist in between your fingers is pretty cool, actually. This is a powerpoint to use when teaching seed dispersal (Unit 5C Life Cycles). Yellow Jewelweed has a shallow taproot that branches out a bit. Growing Conditions for Yellow Jewelweed. They must work in groups to discuss the questions and figure out which method(s) the seed uses to disperse. Use the lesson in the Handbook of Nature Study (Lesson 134) and the Outdoor Hour Challenge in the Autumn Ebook to … Some maintain, however, that this designation refers to the plant’s robin-egg blue seeds. The high lipid content of the seeds (52% of dry mass, Nozzolillo and Thie, 1984) lowers their density, increasing buoyancy. The thistle members of the sunflower family have adapted small, light, helicopter-like seeds that can easily be dispersed by wind. It is a great plant that has value. Jewelweed seeds are ripening! Jewelweed is also known as spotted touch-me-not – spotted because the flowers have dark spots on them and touch-me-not because if you touch the ripe seed pods, the seeds will fly out at high speed up to a metre distant. Images of different seeds. Yellow Jewelweed will grow best in part sun and moist conditions, in soil that is rich in organic matter. The genus name Impatiens, meaning "impatient", refers to its method of seed dispersal. The Right Flowers in Your Inbox! It’s the hummingbirds. The jewelweed releases its seed pods with the gentlest nudge, such as the feather-light touch of a hovering hummingbird. Here is a link to a paper on the mechanics of jewelweed’s explosive seed dispersal. Jewelweed can be used to fill in empty spaces in the garden that might otherwise be taken over by non-native weeds. Loading... Save for later . Expressed over an area of 1 ha, the total amount of time required to control purple jewelweed is 1,400 work hours over 2 yr, or a minimum investment of Can$21,000 (US$17,000). Physical disturbance of the seed pods such as by the touch of a passing animal can stimulate the sudden ejection of the seeds. Some seeds are transported by wind, and have seeds designed to float, glide or spin through the air. Ornamental jewelweed refers to its cultivation as an ornamental plant. It's jewelweed (aka touch-me-not) seed popping season! How to Identify Jewelweed Photo by Wendell Smith via Flickr creative commons. The jewelweed uses a unique type of dispersal, called expulsion, that “explodes” when under pressure or disturbed, sending the seeds inside flying away from the plant, later to germinate. They are quite small, perhaps a ¼ to ½ inch in length. Look closely and locate the plump seed pods hanging down. Ruby-throateds to be more precise. 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