These are notes on three organic forms: papyrus branching, cast-off kelp tangling, and sand drifting.
Papyrus. This is a distinctive type of reed that grows in water, perhaps the first fiber used in the production of manuscripts. Papyrus forms are elegant, appearing early in Egyptian iconography.
Papyrus part classifications: rhizome, culms, umble, bract.
Kelp. A marine algae, kelp grows underwater in large forests along the Northern California coast. Storm activity and other natural factors can cause individual stalks to become un-moored from the bottom of the ocean, and transported by the sea, eventually bundles of kelp stalks become tangled and wash ashore.
Kelp part classifications: holdfast, stipe, fronds, pneumatocysts
Sand dunes and sand drifting. Can be in variable liquids, ie water (underwater sand drifting) or air (wind-formed sand dunes). Sand dunes are a result of sand particles being forced into movement by some force, either wind in the air or currents in the sea. Depending on the starting topology, the particles transported can alight in similar locations, causing drifts. These drifts can be modeled via hydrology/sedimentology in water, and by aeolian processes in air. Water tends to be the more powerful eroding force. Sand drifting forms can be changed via the initial topology (lack of flora to retain sand or block wind, direct exposure on facing windward slopes), the destination topology (walls forcing wind up, depositing sand at the base), the size of the sand particle, and the force and direction of the wind or water.
Sand dune shape classifications: crescent, linear, star, dome, seif, reversing, lithified, coastal. Large areas covered with aeolian landforms are often named like lakes or oceans, but using the term erg.
H. Tsoar, Climatic Factors Affecting Mobility and Stability of Sand Dunes, in Lee, Jeffrey A. and Zobeck, Ted M., 2002, Proceedings of ICAR5/GCTE-SEN Joint Conference, International Center for Arid and Semiarid Lands Studies, Texas Tech University, Lubbock, Texas, USA Publication 02-2 p. 423
H. Tsoar, Types of Aeolian Sand Dunes and Their Formation, 2013
H. Tsoar and H. Pye, Aeolian Sand and Sand Dunes, Springer, 2013. ISBN 9401159882
Andrew Warren, Dunes: Dynamics, Morphology, History, Wiley, 2013. ISBN 1444339680