Question: Which Genus has around 30 species of flowering plants, Schoenoplectus or Isatis?

full_context: Document 1: Baptisia: Baptisia (wild indigo, false indigo) is a genus in the legume family, Fabaceae. They are flowering herbaceous perennial plants with pea-like flowers, followed by pods, which are sometimes inflated. They are native to woodland and grassland in eastern and southern North America. The species most commonly found in cultivation is "B. australis".
Document 2: Fimbristylis: Fimbristylis is a genus of sedges. A plant in this genus may be known commonly as a fimbry, fimbristyle, or fringe-rush. There are 200 to 300 species distributed worldwide. Several continents have native species but many species have been introduced to regions where they are not native. Some are considered weeds. These are typical sedges in appearance, with stiff, ridged stems and cone-shaped terminal panicles of spikelets. They are found in wet environments, and are most diverse in tropical and subtropical regions.
Document 3: Isatis: Isatis is a genus of about 30 species of flowering plants in the family Brassicaceae, native to the Mediterranean region east to central Asia. The genus includes woad ("Isatis tinctoria").
Document 4: Sparganium natans: Sparganium natans is a species of bur-reed known by the common names least bur-reed and small bur-reed. It is a water plant native to high elevation lakes and marshes of Canada and the northern United States. It is usually found submersed in shallow, calm water. This bur-reed has thin, flexible, grasslike leaves which float in the water. Plants that spend more time out of water at the waterline are tougher and have shorter leaves. The plant bears two inflorescences, the staminate type being a rounded white filamentous ball and the pistillate type a sphere of thick, green, pointy peduncles. The fruits are small green or brown achenes.
Document 5: Sparganium: Sparganium (bur-reed) is a genus of flowering plants, described as a genus by Linnaeus in 1753. It is widespread in wet areas in temperate regions of both the Northern and Southern Hemispheres. The plants are perennial marsh plants that can grow to 3.5 m (depending on the species), with epicene flowers.
Document 6: Inula: Inula is a large genus of about 90 species of flowering plants in the family Asteraceae, native to Europe, Asia and Africa.
Document 7: Hirschfeldia: Hirschfeldia incana (formerly "Brassica geniculata") is a species of flowering plant in the mustard family known by many common names, including shortpod mustard, buchanweed, hoary mustard and Mediterranean mustard. It is the only species in the monotypic genus Hirschfeldia, which is closely related to "Brassica". The species is native to the Mediterranean Basin but it can be found in many parts of the world as an introduced species and often a very abundant noxious weed. This mustard is very similar in appearance to black mustard, but is generally shorter. It forms a wide basal rosette of lobed leaves which lie flat on the ground, and it keeps its leaves while flowering. Its stem and foliage have soft white hairs. Unlike black mustard, "H. incana" is a perennial plant.
Document 8: Schoenoplectus: Schoenoplectus (club-rush [Old World species], bulrush or tule [New World species]) is a genus of plants in the sedges with a cosmopolitan distribution. Note that the name bulrush is also applied to species in the unrelated genus "Typha" as well as to other sedges. The genus "Schoenoplectus" was formerly considered part of "Scirpus", but recent phylogenetic data shows that they are not closely related.
Document 9: Carex obnupta: Carex obnupta is a species of sedge known by the common name slough sedge. It is native to western North America from British Columbia to California where it grows abundantly in wet, often saline habitat such as wetlands. The plant produces upright, angled stems approaching 1.2 meters in maximum height, growing in beds or colonies from rhizome networks. The inflorescence is a cluster of flower spikes accompanied by a long leaflike bract. The pistillate spikes and sometimes the staminate spikes dangle on peduncles. The fruit is coated by a hard, tough, shiny perigynium which is generally dark in color.
Document 10: Indigofera: Indigofera is a large genus of over 750 species of flowering plants belonging to the family Fabaceae. They are widely distributed throughout the tropical and subtropical regions of the world.
Document 11: Cyperaceae: The Cyperaceae are a family of monocotyledonous graminoid flowering plants known as sedges, which superficially resemble grasses and rushes. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "Carex" genus of "true sedges" with over 2,000 species. These species are widely distributed, with the centers of diversity for the group occurring in tropical Asia and tropical South America. While sedges may be found growing in almost all environments, many are associated with wetlands, or with poor soils. Ecological communities dominated by sedges are known as sedgelands.
Document 12: Cyperus: Cyperus is a large genus of about 700 species of sedges, distributed throughout all continents in both tropical and temperate regions.
Document 13: Brassicaceae: Brassicaceae or Cruciferae is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, some shrubs, with simple, although sometimes deeply incised, alternatingly set leaves without stipules or in leaf rosettes, with terminal inflorescences without bracts, containing flowers with four free sepals, four free alternating petals, two short and four longer free stamens, and a fruit with seeds in rows, divided by a thin wall (or septum).
Document 14: Barbarea: Barbarea (winter cress or yellow rocket) is a genus of about 22 species of flowering plants in the family Brassicaceae, native to temperate regions of the Northern Hemisphere, with the highest species diversity in southern Europe and southwest Asia. They are small herbaceous biennial or perennial plants with dark green, deeply lobed leaves and yellow flowers with four petals.
Document 15: Borage: Borage ( , Borago officinalis), also known as a starflower, is an annual herb in the flowering plant family Boraginaceae. It is native to the Mediterranean region and has naturalized in many other locales. It grows satisfactorily in gardens in the UK climate, remaining in the garden from year to year by self-seeding. The leaves are edible and the plant is grown in gardens for that purpose in some parts of Europe. The plant is also commercially cultivated for borage seed oil extracted from its seeds. The plant contains pyrrolizidine alkaloids, some of which are hepatotoxic, mutagenic and carcinogenic (see below under Phytochemistry).
ground_truth: Isatis