Question: Is the Loasa genus or the Ferula genus more useful to humans?
Context: Galbanum is an aromatic gum resin, the product of certain umbelliferous Persian plant species in the genus "Ferula", chiefly "Ferula gummosa" (synonym "F. galbaniflua") and "Ferula rubricaulis".  Galbanum-yielding plants grow plentifully on the slopes of the mountain ranges of northern Iran.  It occurs usually in hard or soft, irregular, more or less translucent and shining lumps, or occasionally in separate tears, of a light-brown, yellowish or greenish-yellow colour, and has a disagreeable, bitter taste, a peculiar, somewhat musky odour, an intense green scent, and a specific gravity of 1.212.  It contains about 8% terpenes; about 65% of a resin which contains sulfur; about 20% gum; and a very small quantity of the colorless crystalline substance umbelliferone.  It also contains α-pinene, β-pinene, limonene, cadinene, 3-carene, and ocimene. Ferula is a genus of flowering plants. Ferula communis, the giant fennel, is a species of flowering plant in the carrot family Apiaceae.  It is related to common fennel, which belongs to another genus, "Foeniculum". Ferula tingitana (the giant Tangier fennel) is a species of the Apiaceae genus "Ferula".  Despite the name, the plant is not a type of fennel proper, which belongs to another genus ("Foeniculum"). Ferulic acid is a hydroxycinnamic acid, a type of organic compound.  It is an abundant phenolic phytochemical found in plant cell walls, covalently bonded as side chains to molecules such as arabinoxylans.  As a component of lignin, ferulic acid is a precursor in the manufacture of other aromatic compounds.  The name is derived from the genus "Ferula", referring to the giant fennel ("Ferula communis"). The God Species: Saving the Planet in the Age of Humans (alternatively, "The God Species: How the Planet Can Survive the Age of Humans" (U.S.) or "The God Species: How Humans Really Can Save the Planet..." (paperback)) is a 2011 book by environmental writer Mark Lynas.  It argues that since the Earth has entered an age where several of its systems are in the control of humanity—the Anthropocene—it is now up to humans to use this power wisely.  The book challenges several beliefs usually held by environmentalists, arguing that technology like nuclear power and genetic engineering are useful and necessary tools to keep the Earth system within planetary boundaries, and that the Green movement's insistence on lifestyle changes and opposition to economic growth are unlikely to work. Sumbul, also called sumbal or muskroot, is a drug occasionally employed in European medical practice.  It consists of the root of "Ferula moschata ", known formerly by the synonym "Ferula sumbul" , a tall umbelliferous plant of the 'Giant Fennel' genus "Ferula" found primarily in the north of Bokhara in present-day Uzbekistan, although its range apparently extends into Southeastern Siberia : beyond the Amur river. Loasa is a genus of ornamental plants in the family Loasaceae.  These plants are usually prickly herbs, or subshrubs, and they are native to tropical America. Ferula (from Latin "ferula", "rod") is a genus of about 170 species of flowering plants in the carrot family, native to the Mediterranean region east to central Asia, mostly growing in arid climates.  They are herbaceous perennial plants growing to 1–4 m tall, with stout, hollow, somewhat succulent stems.  The leaves are tripinnate or even more finely divided, with a stout basal sheath clasping the stem.  The flowers are usually yellow, rarely white, produced in large umbels.  Many plants of this genus, especially "F. communis" are referred to as "giant fennel," although they are not fennel in the strict sense. Pseudolaguvia is a genus of South Asian river catfishes.  These species inhabit hill streams and large rivers.  "P. tenebricosa" is found in fast running, clear water; the river has a sandy bottom and numerous rocks and boulders and aquatic vegetation is absent.  "P. inornata" is from clear, shallow, moderately flowing streams with a predominantly sandy bottom.  "P. muricata" is found in clear, shallow, slow-flowing streams with a mixed substrate of sand and detritus; these fish are found amongst detritus in areas with current.  "P. ferula" is also found in swift flowing waters with a mixed rocky/sandy bottom.
Answer: Ferula