Question: What part of a plant does Berzelia and Cabomba have in common?
Context: Cabomba is an aquatic plant genus, one of two belonging to the family Cabombaceae.  It has divided submerged leaves in the shape of a fan (hence the vernacular name fanwort) and is much favoured by aquarists as an ornamental and oxygenating plant for fish tanks.  Use in the aquarium trade has led to some species being introduced to other parts of the world, such as Australia, where they have become weeds. Spirodela polyrhiza (orth.  var.  "S. polyrrhiza") is a species of duckweed known by the common names common duckmeat, greater duckweed, common duckweed, and duckmeat.  It can be found nearly worldwide in many types of freshwater habitat.  It is a perennial aquatic plant usually growing in dense colonies, forming a mat on the water surface.  Each plant is a smooth, round, flat disc one half to one centimeter wide.  It produces several minute roots.  It also produces a pouch containing male and female flowers.  The top part dies in the fall and the plant often overwinters as a turion. Bensoniella is a monotypic genus of plants in the saxifrage family containing the single species Bensoniella oregona (also, "B. oregana"), which is known by the common name Oregon bensoniella, or simply bensoniella.  This plant is endemic to the Klamath Mountains of northern California and southern Oregon.  This is a plant of the wet forest understory and meadows above 1000 meters in elevation.  It is a perennial herb which grows from a rhizome and bears rounded to heart-shaped lobed leaves with woolly petioles and tall, thin racemes of flowers.  Each flower is white with bright yellow-pink anthers.  The plant produces capsules of abundant seeds but also reproduces vegetatively.  When it does reproduce sexually, it often self-pollinates.  Bensoniella is not endangered but it is a species of some concern for several reasons, including lack of genetic diversity in part due to its habit of self-pollination and asexual reproduction, its relatively narrow tolerance of habitats, its small range of distribution, habitat destruction due to logging, grazing, and road-building, and erosion.  The plant was first discovered and named by Lilla Leach. Pholisma arenarium is a species of flowering plant in the borage family known by several common names, including desert Christmas tree, scaly-stemmed sand plant, and purple sand food.  It is native to northwestern Mexico, Arizona and southern California, where it grows in many habitat types, including desert, chaparral, and sandy coastal dunes.  It is a fleshy perennial herb taking a compact cylindrical or ovate shape up to 20 or 30 centimeters tall above ground, often with part of the stem below the sandy surface.  It is a parasitic plant growing on the roots or of various shrubs such as burrobush, Yerba Santa, California croton, rabbitbrush, and ragweeds.  As a heterotroph which derives its nutrients from other plants, it lacks chlorophyll and is brownish-gray or whitish in color.  There are hairy, glandular, pointed leaves along the surface of the plant.  Flowers emerge between them, each roughly one centimeter wide, the rounded corolla lavender to deep or bright purple with a white margin. Wolffia arrhiza is a species of flowering plant known by the common names spotless watermeal and rootless duckweed, belonging to the Araceae, a family rich in water-loving species, such as "Arum" and "Pistia".  It is the smallest vascular plant on Earth.  It is native to Europe, Africa, and parts of Asia, and it is present in other parts of the world as a naturalized species.  It is an aquatic plant which grows in quiet water bodies such as ponds.  The green part of the plant, the frond, is a sphere measuring about 1 mm wide, but with a flat top that floats at the water's surface.  It has a few parallel rows of stomata.  There is no root.  The plant produces a minute flower fully equipped with one stamen and one pistil.  It often multiplies by vegetative reproduction, however, with the rounded part budding off into a new individual.  In cooler conditions the plant becomes dormant and sinks to the bed of the water body to overwinter as a turion.  The plant is a mixotroph which can produce its own energy by photosynthesis or absorb it from the environment in the form of dissolved carbon. Lophosoria quadripinnata is a species of fern that, according to DNA molecular analysis, belongs to the Dicksoniaceae family, where it is placed in the genus "Lophosoria".  It is found in the Americas spanning from Cuba and Mexico to Chile.  In Chile it is present in the area between Talca and Aysén including Juan Fernández Islands.  In Argentina it grows only in the humid valleys of western Neuquén and Río Negro Province.  Diamondleaf fern is a common name.  In Spanish it is known as 'ampe' (from the Mapudungun añpe) or palmilla, but one has to remember that there are several species of ferns called "palmillas" that have larger or smaller fronds, and which grow in colder climates.  It is a medium-sized plant, growing to about 4–5 feet (though 10–12 feet in a sheltered place at Arduaine Garden in Argyll, Scotland) and even though the rhizome does not grow a trunk, it is clearly related to the other tree ferns due to features that were apparently already present in their common ancestor, like 'pneumathodes', and the rhizome which changed from the dorsiventral symmetry typical of the other ferns, to a radial symmetry typical of tree ferns.  Their large and multiple pinnate fronds, with the petiole raised adaxially, and the hairs on the rhizome and lower part of the petioles, also resemble those of tree ferns.  To identify the species, use the position and characteristics of the spores found on the fertile fronds.  The genus already existed in the Cretaceous Period in southern Gondwana according to fossil remains found in Antarctica.  The species is well known as an ornamental plant. Cabomba furcata is a species of aquatic plant in the water shield family known by the common names red cabomba and forked fanwort.  It is native to South America and as far north as Cuba and the tip of Florida.  It reaches a maximum height between 30 and 80 cm and is up to 8 cm wide.  It bears purple flowers. Sisymbrium altissimum is a species of "Sisymbrium".  The plant is native to the western part of the Mediterranean Basin in Europe and Northern Africa and is widely naturalized throughout most of the world, including all of North America.  It was probably introduced into North America by a contaminant crop seed.  The plant grows in soils of all textures, even sand.  The plant germinates in winter or early spring.  The blooming time is lengthy, and after maturity the plant forms a tumbleweed.  Common names of the plant include Jim Hill mustard, after James J. Hill, a Canadian-American railroad magnate, tall tumblemustard, tall mustard, tumble mustard, tumbleweed mustard, tall sisymbrium, and tall hedge mustard. Berzelia is a genus consisting of 12 species of upright, wiry stemmed, evergreen shrubs with a dense covering of small, fine, needle-like leaves.  The flowers which appear in spring and summer, are minute but are packed in spherical clusters, of which there are several per head of bloom.  The flowers are white to cream and, because the stamens extend beyond the tiny petals, the flowerheads appear to be studded with protrusions. South Works is an area in the South Chicago part of Chicago, Illinois, near the mouth of the Calumet River, that was previously home to a now-closed and vacant US Steel manufacturing plant.  The area is called "South Works" because that was the name of the now-shuttered steel plant.  The use of the word "works," following a common name of the area in which the plant was located, was how US Steel named its plants back then.  For example, nearby Gary, Indiana's big US Steel plant is known as "Gary Works."
Answer: leaves