Are Crepis and Rhubarb both plants?
yes
Crepis
Crepis, commonly known in some parts of the world as hawksbeard or hawk's-beard (but not to be confused with the related genus "Hieracium" with a similar common name), is a genus of annual and perennial flowering plants of the family Asteraceae superficially resembling the dandelion, the most conspicuous difference being that "Crepis" usually has branching scapes with multiple heads (though solitary heads can occur).
 The genus name "Crepis" derives from the Greek "krepis", meaning "slipper" or "sandal", possibly in reference to the shape of the fruit.
Rhubarb
Rhubarb ("Rheum rhabarbarum") is a species of plant in the family Polygonaceae.
 It is a herbaceous perennial growing from short, thick rhizomes.
 It produces large poisonous leaves that are somewhat triangular, with long fleshy edible stalks and small flowers grouped in large compound leafy greenish-white to rose-red inflorescences.
Crepis sibirica
Crepis sibirica, is an Asian and eastern European species of plants in the dandelion tribe within the sunflower family.
 It has been found in China (Heilongjiang, Liaoning, Inner Mongolia, Xinjiang), Mongolia, Russia, Central Asia, and eastern Europe. Desert rhubarb
Desert rhubarb is a common name for several desert dwelling plants related to rhubarb and may refer to: Gunnera tinctoria
Gunnera tinctoria, known as giant rhubarb or Chilean rhubarb, is a flowering plant species native to southern Chile and neighbouring zones in Argentina.
 It is unrelated to rhubarb, as the two plants belong into different orders, but looks similar from a distance and has similar culinary uses.
 It is a large-leaved perennial plant that grows to more than two metres tall.
 It has been introduced to many parts of the world as an ornamental plant and in some countries (for instance New Zealand, Great Britain and Ireland) it has spread from gardens and is becoming a weed problem. Nasonovia ribisnigri
Nasonovia ribisnigri is a species of aphid.
 Their primary hosts are currant plants, including blackcurrants ("Ribes nigrum") and gooseberries ("Ribes uva-crispa"), while the secondary hosts are a wider range of plants, including members of the Compositae ("Hieracium", "Lapsana", "Crepis", "Leontodon" and "Cichorium"), Lamiales ("Veronica" and "Euphrasia") and Solanaceae ("Nicotiana" and "Petunia"). Crepis phoenix
Crepis phoenix, is a Chinese species of plants in the dandelion tribe within the sunflower family.
 It has been found only in the Province of Yunnan in southern China. Rheum (plant)
Rheum is a genus of about 60 perennial plants in the family Polygonaceae.
 The genus includes the vegetable rhubarb ("Rheum rhabarbarum" or "Rheum x hybridum".)
 The species have large somewhat triangular shaped leaves with long, fleshy petioles.
 The flowers are small, greenish-white to rose-red, and grouped in large compound leafy inflorescences.
 A number of varieties of rhubarb have been domesticated both as medicinal plants and for human consumption.
 While the leaves are toxic, the stalks are used in pies and other foods for their tart flavor. Crepis paludosa
Crepis paludosa, the marsh hawk's-beard, is a European species of plants in the dandelion tribe within the sunflower family.
 It is widespread across much of Europe with isolated populations in Iceland, the Ural Mountains, and the Caucasus. Crepis intermedia
Crepis intermedia is a North American species of flowering plants in the daisy family known by the common name limestone hawksbeard.
 It is native to western Canada (Saskatchewan, Alberta, British Columbia) and the western United States (Montana, Wyoming, Colorado, New Mexico, Arizona, Utah, Nevada, Idaho, Washington, Oregon, California).