Galls beside midrib of alder leaf - geograph.org.uk - 957964

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Summary.mw-parser-output table.commons-file-information-table,.mw-parser-output.fileinfotpl-type-information{border:1px solid #a2a9b1;background-color:#f8f9fa;padding:5px;font-size:95%;border-spacing:2px;box-sizing:border-box;margin:0;width:100%}.mw-parser-output table.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{vertical-align:top}.mw-parser-output table.commons-file-information-table>tbody>tr>td,.mw-parser-output table.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:4px}.mw-parser-output.fileinfo-paramfield{background:#ccf;text-align:right;padding-right:0.4em;width:15%;font-weight:bold}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{border-top:0;padding-top:0;margin-top:-8px}@media only screen and (max-width:719px){.mw-parser-output table.commons-file-information-table,.mw-parser-output.commons-file-information-table.fileinfotpl-type-information{border-spacing:0;padding:0;word-break:break-word;width:100%!important}.mw-parser-output.commons-file-information-table>tbody,.mw-parser-output.fileinfotpl-type-information>tbody{display:block}.mw-parser-output.commons-file-information-table>tbody>tr>td,.mw-parser-output.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:0.2em 0.4em;text-align:left;text-align:start}.mw-parser-output.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{display:flex;flex-direction:column}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{margin-top:-1px}.mw-parser-output.fileinfo-paramfield{box-sizing:border-box;flex:1 0 100%;width:100%}} Description: English: Galls beside midrib of alder leaf. Two kinds of leaf gall were present in abundance on the native alder trees (Alnus glutinosa) in this area; both kinds could often be found on the same tree. Those shown in this photo are caused by the gall mite species Eriophyes inangulis; as the specific part of that name suggests, they grow in the angles between the midrib of the leaf and the side veins. They are about 5 mm long, and, as can be seen, are elongated in the direction of the midrib. On the underside of the leaf, the openings of the galls are quite prominent; they are fringed with brown hairs. The other variety of gall that was present on these trees is shown here: 957963. Date: 10 September 2008. Source: From geograph.org.uk. Author: Lairich Rig. Camera location55° 57′ 52″ N, 4° 34′ 40″ W View all coordinates using: OpenStreetMap 55.964450; -4.577800. Object location55° 57′ 52″ N, 4° 34′ 39″ W View all coordinates using: OpenStreetMap 55.964450; -4.577600.