Llanos
The grass and woody plants in the llano alto are 30–100 cm high, forming bunches 10 to 30 cm apart. The ground is typically sandy and does not have many food chemicals for the plants. The llano alto covers approximately two-thirds of the Llanos in Venezuela and much of the Colombian Llanos. There are many grasses in the genus Trachypogon: species include Trachypogon plumosus, T. vestitus, Axonopus canescens, A. anceps, Andropogon selloanus, Aristida spp., Leptocoryphium lanatum, Paspalum carinatum, Sporobolus indicus, and S. cubensis, and sedges in the genera Rhynchospora and Bulbostylis. Woody plants and green plants are legumes in the genera Mimosa, Cassia, Desmodium, Eriosema, Galactia, Indigofera, Phaseolus, Stylosanthes, Tephrosia, and Zornia. The trees manteco (Byrsonima crassifolia),  chaparro (Curatella americana), and alcornoque (Bowdichia virgilioides) are the most common. They can grow apart from each other.  When they grow togehter, they are called matas.  The matas can be as small as 12 meters across or as large as a hectare.