I'm not sure what you mean by elastic. Is it sticky to the touch? If so, you may be talking about bedstraw which is a common spring weed in eastern and midwestern garden. It has small white flowers and the plants are very sticky. To combat, hand pulling it the only real option unless you have a big bed where you could safely use Round-up herbicide. If I'm guessing wrong, repost your question with a fuller description of the plant.