1.0Cooperative Extension Publicationshttps://extension.umaine.edu/publicationsrich900600<blockquote class="wp-embedded-content" data-secret="jTdWQVDnYQ"><a href="https://extension.umaine.edu/publications/2562e/">Bulletin #2562, Native Trees and Shrubs for Maine Landscapes: Hazel Alder or Speckled Alder (<em>Alnus incana ssp. rugosa</em>)</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://extension.umaine.edu/publications/2562e/embed/#?secret=jTdWQVDnYQ" width="100%" height="338" title="“Bulletin #2562, Native Trees and Shrubs for Maine Landscapes: Hazel Alder or Speckled Alder (<em>Alnus incana ssp. rugosa</em>)” — Cooperative Extension Publications" data-secret="jTdWQVDnYQ" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> Speckled alder functions best when naturalized in sunny, wet areas, such as along streams or ponds or in wet spots of open woods. Its habit of sending out many suckers (vigorous vertical shoots emanating from the base of the plant) will eventually lead to the formation of large colonies that function in anchoring the soil and preventing erosion.https://extension.umaine.edu/publications/wp-content/uploads/sites/52/2016/01/alnus-incana-ssp-rugosa-195x300.jpg