Question: Which plant grows in a specific region, Dendromecon or Aulax? 
Context: In all respects except frost hardiness, these are tough plants.  They tolerate extreme heat, very low humidity, and prolonged drought.  Like virtually all Proteaceae plants, they grow best on a light gritty soil with good drainage.  They propagate from seed or half-hardened late summer-autumn cuttings. Delphinium staphisagria is a species of "Delphinium", or larkspur, of the family Ranunculaceae.  This plant is also known as Lice-Bane or Stavesacre.  It is described botanically as a stoutly-stemmed, hairy biennial with large palmate leaves up to 6 inches (15 cm) across.  The flowers are mauve-blue to blue, short-spurred, and up to 1 inch (2.5 cm) across, occurring in racemes.  The plant grows to a height of 4–5 feet.  It grows throughout the Mediterranean.  The dark-colored, wrinkled seeds of "D. staphisagria" are characteristically quite large (~5x6 mm), and it is likely that the species name, which translates to "wild raisin" (classical Greek: σταφὶς ἀγρία) is based on their appearance.  This name-derivation seems to have been arrived at independently by a modern horticulturalist, David Bassett, who also gives a detailed account of his experiences in growing this species.  All parts of this plant are highly toxic and should not be ingested in any quantity. Styrax grandifolius, the bigleaf snowbell or bigleaf storax, is a plant species native to the southeastern United States, ranging from Virginia south to Florida and west to Texas and Missouri.  The plant grows as a deciduous shrub or tree up to 6 m high, and is most commonly found in upland forests of the southeast’s piedmont.  As the specific epithet suggests, the species has larger leaves than sympatric Styracaceae, with alternate, obovate leaves up to 14 cm long and 10 cm wide that are densely pubescent underneath.  Flowers are borne during early summer in racemes containing up to 20 flowers. Argemone albiflora, the white prickly poppy, also known as the bluestem prickly poppy or the Texas prickly poppy, is a small erect plant with a decorative white flower with a yellow latex.  It is deeply rooted with yellow or red stamens.  The plant is known for the sharp prickles on its stem and leaves.  The sepals fall off as the flower of this plant grows bigger.  It grows in the arid regions of the southern Midwest along roadsides and disturbed pieces of land.  Native Americans have long revered this plant for its medicinal and other uses. The Zoobles!  are magical mischievous animals that can assume into their ball forms to travel into great distances.  They all live in the mystical Zooble Isle and all come in different types and species and live in a specific region.  Each species were only found in that specific region of the isle.  In the Japanese Version, the Zoobles were born form the Magical Candy Factory, each of them were based on sweets and flavors.  They all live in the magical world of Candy Land, where they all live their daily lives. Salvia namaensis is an evergreen perennial shrub native to a limited area in Namibia and a wide area of South Africa (the Cape Provinces and the Free State).  It is typically found growing on rocky slopes, shales, limestone hills, and sandy soils at 1,000 to 5,000 feet elevation.  The specific epithet "namaensis" probably refers to the Nama tribe which is indigenous to Namaqualand, the region in Namibia where the plant grows. Chorizanthe watsonii is a species of flowering plant in the buckwheat family known by the common name fivetooth spineflower.  It is native to the western United States from Washington to the Mojave Desert.  It grows in many types of plant communities from desert scrub to woodland and sagebrush.  This small plant grows a woolly erect stem up to about 15 centimeters tall.  The inflorescence is a cluster of flowers surrounded by five hairy greenish bracts tipped with hooked awns.  The flower is about 2 millimeters wide and yellow in color. Hydnora africana is an achlorophyllous plant in the family Hydnoraceae, native to southern Africa that is parasitic on the roots of members of the Euphorbiaceae family.  The plant grows underground, except for a fleshy flower that emerges above ground and emits an odor of feces to attract its natural pollinators, dung beetles and carrion beetles.  The flowers act as temporary traps, retaining the beetles that enter long enough for them to pick up pollen.  It is also called jakkalskos or jackal food.  The genus name comes from the Greek word "hydnon", which translates to "truffle," and the specific epithet "africana" means to be from Africa. Mendoncia velloziana is a plant native to Atlantic Coast restingas vegetation which is an ecosystem of Atlantic Forest biome.  In addition, this plant grows either in Cerrado vegetation of Brazil.  This plant grows in following states of Brazil: Bahia, Ceará Minas Gerais Rio de Janeiro, São Paulo, Paraná and Santa Catarina, and it is usually visited by the hummingbirds. Dendromecon, the tree poppy, is a genus of one or two species of shrubs to small trees, native to California and northern Baja California.
Answer: Dendromecon