The axis of the spikelet is frequently jointed and breaks up into articulations above each flower.
Birds, with well-fitting articulations, quite different from those of ordinary reptiles.
In their early state all leaves are continuous with the stem, and it is only in their after growth that articulations are formed.
At Rechtenstein a bridge of two concrete arches has been constructed, span 752 ft., with lead articulations: width of arch 11 ft.; depth of arch at crown and springing 2.1 and 2.96 ft.
About twenty-seven species are now known, all characterized by length not excee 4 ding 06 of an inch, flat wings, three articulations in the antennae, one or two articulations in the tarses, with digitules, but without cornicles on the abdomen.