Sinornithosaurus form from those found on birds from the same geological deposits. The body (contour) feathers were generally between 3-4.5 cm long and included two types: the first type are formed of several filaments joined together into "tufts", similar to modern down feathers. The second type, including those on the arms, were composed of rows of filaments ("barbs") joined together along a main shaft ("rachis"), making them similar in structure to modern bird feathers. However, unlike the wing feathers of flying birds, they did not have the secondary branches with tiny little hooks ("barbules") that flight feathers have, which allow the
Calamus (poems) the allegedly mind-altering effects of the root. The root was chiefly chewed at the time as a breath-freshener and to relieve stomach complaints. Calamus (poems) The "Calamus" poems are a cluster of poems in "Leaves of Grass" by Walt Whitman. These poems celebrate and promote "the manly love of comrades". Most critics believe that these poems are Whitman's clearest expressions in print of his ideas about homosexual love. The first evidence of the poems that were to become the "Calamus" cluster is an unpublished manuscript sequence of twelve poems entitled "Live Oak With Moss," written in or before spring 1859.