Question: Which plant belongs has more hairy structures, Pilosocereus or Sesleria?
Context: The tomato (see pronunciation) is the edible, often red, fruit of the plant "Solanum lycopersicum", commonly known as a tomato plant.  The plant belongs to the nightshade family, which is called "Solanaceae". Arthropods make use of smooth adhesive pads as well as hairy pads for climbing and locomotion along non-horizontal surfaces.  Both types of pads in insects make use of liquid secretions and are considered 'wet'.  Dry adhesive mechanisms primarily rely on van der Waals’ forces and are also used by organisms other than insects.  The fluid provides capillary and viscous adhesion and appears to be present in all insect adhesive pads.  Little is known about the chemical properties of the adhesive fluids and the ultrastructure of the fluid producing cells is currently not extensively studied.  Additionally, both hairy and smooth types of adhesion have evolved separately numerous times in insects.  Few comparative studies between the two types of adhesion mechanisms have been done and there is a lack of information regarding the forces that can be supported by these systems in insects.  Additionally, tree frogs and some mammals such as the arboreal possum and bats also make use of smooth adhesive pads.  The use of adhesive pads for locomotion across non-horizontal surfaces is a trait that evolved separately in different species, making it an example of convergent evolution.  The power of adhesion allows these organisms to be able to climb on almost any substance.  The exact mechanisms of arthropod adhesion are still unknown for some species but this topic is of great importance to biologists, physicists and engineers.  These highly specialized structures are not restricted to one particular area of the leg.  They may be located on different parts, such as claws, derivatives of the pretarsus, tarsal apex, tarsomeres or tibia.  From the scaling analysis, it has been suggested that animal lineages relying on the dry adhesion, such as lizards and spiders have a higher density of terminal contact elements compared to systems that use wet adhesive mechanisms such as insects.  Since these effects are based on fundamental physical principles and highly related to the shape of the structure, they are also the same for artificial surfaces with similar geometry.  Adhesion and friction forces per-unit-pad area were very similar in smooth and hairy systems when tested.  Strong adhesion may be beneficial in many situations but it also can create difficulties in locomotion.  Direction-dependence is an important and fundamental property of adhesive structures that are able to rapidly and controllably adhere during locomotion.  Researchers are unsure whether direction-dependence is achieved through changes in contact area or through a change in shear stress.  Friction and adhesion forces in most animal attachment organs are higher when they are pulled towards the body than when they push away from it.  This has been observed in geckos and spiders but also in the smooth adhesive pads of ants, bush-crickets and cockroaches.  Adhesive hairs of geckos are non-symmetrical and feature distally pointing setae and spatulae that are able to generate increased friction and adhesion when aligned with a proximal pull.  The adhesive hairs of some beetles behave similarly to those of geckos.  While directional-dependence is present in other animals, it has yet to be confirmed in insects with hairy adhesive pads. Pilosocereus (from Latin, "hairy cereus") is a genus of cactus.  Tree cactus is a common name for "Pilosocereus" species. Tecticornia indica is a species of plant that is succulent and halophyte (salt tolerant) which grows in salt marshes on tropical areas of the world.  This plant belongs to the Chenopodiaceae, which are now included in Amaranthaceae family. Oplopanax japonicus (Nakai) is deciduous shrub that can grow as high as 3 m tall.  The plant is densely packed with spikes and those spikes are irritant.  This species of plant belongs to a genus that is rich in calcium oxalate, which is toxic to the digestive system. Psychotria mariniana, the forest wild coffee or "kōpiko", is a tree endemic to Hawaiʻ i.  The plant belongs to the Rubiaceae (coffee) family, subfamily Rubioidae.  It is a tree of varying size with a dark bark, shiny leaves, and orange oval fruit. Clematis hirsutissima is a species of flowering plant in the buttercup family known by the common name hairy clematis.  It is native to much of the western United States, from Washington to Nebraska.  It is a small, erect plant which, unlike other "Clematis", does not generally produce vines.  It is quite variable in appearance, especially across varieties.  In general the hairy stem reaches up to about half a meter tall and has many hairy leaves divided into lance-shaped lobes.  The inflorescence appears at the tip of the stem and bears a solitary flower.  The flower is made up of an urn-shaped cup of deep purple-blue petallike sepals, which are fuzzy and have pointed or rounded tips.  Rare individuals have white or pinkish sepals.  There are no true petals.  The fruit is a hairy achene with a very long beak and a plume on the end. Abarema acreana is a tree species in the legume family (Fabaceae).  It is a rather mysterious plant and may be endemic to Brazil.  Fruiting trees apparently have never been found, and thus it is not clear whether this plant belongs into the genus "Abarema", or in "Hydrochorea", or elsewhere. Sesleria is a Eurasian and North African genus of perennial plants in the grass family. Pilea microphylla also known as rockweed, artillery plant, gunpowder plant or (in Latin America) brilhantina is an annual plant native to Florida, Mexico, the West Indies, and tropical Central and Southern America.  In the southern part of México, specifically Campeche and Merida, the local name is Frescura.  The plant belongs to the Urticaceae family.  It has light green, almost succulent, stems and tiny 1/8" leaves which contribute to its other nickname, "Artillery Fern", though it is not related to ferns.  It is grown as a ground cover in many areas.
Answer: Pilosocereus