Question: Which plant is found on more continents, Codiaeum or Petrophile?

Context paragraphs:
Erodium moschatum: Erodium moschatum is a species of flowering plant in the geranium family known by the common names musk stork's-bill and whitestem filaree.  This is a weedy annual or biennial herb which is native to much of Eurasia and North Africa but can be found on most continents where it is an introduced species.  The young plant starts with a flat rosette of compound leaves, each leaf up to 15 centimeters long with many oval-shaped highly lobed and toothed leaflets along a central vein which is hairy, white, and stemlike.  The plant grows to a maximum of about half a meter in height with plentiful fuzzy green foliage.  The small flowers have five sepals behind five purple or lavender petals, each petal just over a centimeter long.  The filaree fruit has a small, glandular body with a long green style up to 4 centimeters in length.

Amorpha fruticosa: Amorpha fruticosa is a species of flowering plant in the legume family (Fabaceae) known by several common names, including desert false indigo, false indigo-bush, and bastard indigobush.  It is found wild in most of the contiguous United States, southeastern Canada, and northern Mexico, but it is probably naturalized in the northeastern and northwestern portion of its current range.  The species is also present as an introduced species in Europe, Asia, and other continents.  It is often cultivated as an ornamental plant, and some wild populations may be descended from garden escapes.

Cushion plant: A cushion plant is a compact, low growing, mat forming plant that is found in alpine, subalpine, arctic, or subarctic environments around the world.  The term "cushion" is usually applied to woody plants that grow as spreading mats, are limited in height above the ground (a few inches at most), have relatively large and deep tap roots, and have life histories adapted to slow growth in a nutrient poor environment with delayed reproductivity and reproductive cycle adaptations.  The plant form is an example of parallel or convergent evolution with species from many different plant families on different continents converging on the same evolutionary adaptations to endure the harsh environmental conditions.

Ludwigia palustris: Ludwigia palustris is a species of flowering plant in the evening primrose family known by the common names marsh seedbox, Hampshire-purslane and water purslane.  Its native distribution is unclear, but includes parts of the Americas; it can be found on most continents and spreads easily to become naturalized.  It is also cultivated as an aquarium plant.  This is an aquatic or semiaquatic perennial herb which grows in moist to wet to flooded areas.  It is sometimes a weed.  The stem is up to half a meter long and spreads to form mats on the mud, rooting at nodes in contact with the substrate, or floats ascending in the water.  The leaves are oppositely arranged and green to red or purple in color.  Solitary flowers appear in leaf axils.  They are made up of tiny green sepals and no petals.  They yield small capsular fruits containing many minute seeds.

Petrophile: Petrophile is a genus of evergreen shrubs, in the family Proteaceae.  The genus is endemic to Australia.  Commonly known as conebushes, they typically have prickly, divided foliage and produce prominently-displayed pink, yellow or cream flowers followed by grey, conical fruits.

List of plants poisonous to equines: Many plants are poisonous to equines; the species vary depending on location, climate, and grazing conditions.  In many cases, entire genera are poisonous to equines and include many species spread over several continents.  Plants can cause reactions ranging from laminitis (found in horses bedded on shavings from black walnut trees), anemia, kidney disease and kidney failure (from eating the wilted leaves of red maples), to cyanide poisoning (from the ingestion of plant matter from members of the "Prunus" genus) and other symptoms.  Members of the "Prunus" genus have also been theorized to be at fault for mare reproductive loss syndrome.  Some plants, including yews, are deadly and extremely fast-acting.  Several plants, including nightshade, become more toxic as they wilt and die, posing a danger to horses eating dried hay or plant matter blown into their pastures.

Halimodendron: Halimodendron is a monotypic genus of legume containing the single species Halimodendron halodendron, which is known by several common names, including common salt tree and Russian salt tree.  It is closely related to the genus "Caragana".  It is native to Russia and southern Asia, but it can be found on other continents where it is an introduced species, and one that is often a noxious weed.  This is a deciduous spiny shrub sprawling to a few meters in maximum width and up to three meters tall.  Stems branch from the base and bear clusters of about four leaflets on sharp spurs.  The ends of branches narrow to spines.  Flowers also appear at the ends of spurs in clusters of two to four pink pealike blossoms each one to two centimeters wide.  The fruit is a black woody inflated pod about 2 centimeters long containing legume seeds.  The plant has a deep and wide root system, with the lateral roots sending up new shoots.  In this manner the plant forms extensive thickets.  When introduced to an area of suitable climate, such as California where it is a known weed, it can invade cultivated land and spread relatively quickly.  It is tolerant of saline soils.

Holarctic: The Holarctic is the name for the biogeographic realm that encompasses the majority of habitats found throughout the northern continents of the world, combining Wallace's Palearctic zoogeographical region, consisting of North Africa and all of Eurasia (with the exception of the southern Arabian Peninsula, Southeast Asia, and the Indian subcontinent), and the Nearctic zoogeographical region, consisting of North America, north of Mexico.  These regions are further subdivided into a variety of ecoregions.  Many ecosystems, and the animal and plant communities that depend on them, are found across multiple continents in large portions of this realm.  The continuity of these ecosystems results from the shared glacial history of the realm.  The floristic Boreal Kingdom corresponds to the Holarctic realm.

Codiaeum: Codiaeum is a genus of plants under the family Euphorbiaceae first described as a genus in 1824.  It is native to insular Southeast Asia, northern Australia and Papuasia.

Lindernia dubia: Lindernia dubia is a species of flowering plant known by the common names yellowseed false pimpernel and moist bank pimpernel.  It is a member of the "new" plant family Linderniaceae, and it is sometimes treated as a member of the families Scrophulariaceae and Plantaginaceae.  It is native to much of the Americas from Canada to Chile, and it can be found on other continents as an introduced species.  It grows in wet habitat, such as riverbanks, pond margins, and meadows.  It is an annual herb growing a mostly erect, branching stem to exceed 30 centimeters in height.  The oppositely arranged leaves vary in size and shape, from lance-shaped to oval, toothed or not, and under one to over three centimeters long.  Flowers emerge from upper leaf axils.  Each has a calyx of five narrow, linear sepals.  The tubular corolla is up to a centimeter long, white in color with a blue or purple tint, and lipped at the mouth, the lower lip with three rounded lobes.  The fruit is a capsule containing yellow seeds.

Supporting paragraphs: Codiaeum Petrophile
Answer: Codiaeum