Question: Are Orontium and Cirsium both perennial plants?

Context articles: Cirsium fontinale
Orontium aquaticum
Perennial grain
Cirsium rydbergii
Perennial rice
Cirsium wrightii
Cassida panzeri
Orontium
Cirsium
Cirsium setidens

Cirsium fontinale or fountain thistle is a flowering perennial herb in the sunflower family.
 It is endemic to California.
 The "Cirsium" genus is commonly known as the "thistle" genus, "Cirsium" being the Greek word for 'thistle.'
Orontium aquaticum , sometimes called golden-club, floating arum, never-wets or tawkin, is a species of flowering plants in the Araceae family.
 It is the single living species in the genus "Orontium", which also contains several extinct species described from fossils.
 "O. aquaticum" is endemic to the eastern United States and is found growing in ponds, streams, and shallow lakes.
 It prefers an acidic environment.
 The leaves are pointed and oval with a water repellent surface.
 The inflorescence is most notable for having an extremely small almost indistinguishable sheath surrounding the spadix.
 Very early in the flowering this green sheath withers away leaving only the spadix.
 The sheath was originally classified by Adolf Engler as a spathe due it being the last foliar piece before the spadix.
 He also noted that species lacked a sympodial leaf.
 However, in a 1988 paper by Thomas Ray, he argued that the structure was misidentified by Engler and was actually a sympodial leaf.
 According to Ray the spathe was missing and not the sympodial leaf.
 This interpretation was determined based on observations of morphological charactestics namely the appearance of a two-keeled bracteole and its positioning.
 Despite this, the floral structure is still commonly identified in the literature as being a spathe.
 The flowering occurs in the spring.
 Native Americans once ate the seeds and rhizome by drying them out and grinding them into a starchy substance.
A perennial grain is a grain crop that lives and remains productive for two or more years.
 While many fruit, nut and forage crops are long-lived perennial plants, all major grain crops presently used in large-scale agriculture are annuals or short-lived perennials grown as annuals.
 Scientists from several nations have argued that perennial versions of today's grain crops could be developed and that these perennial grains could make grain agriculture more sustainable.
Cirsium rydbergii (Rydberg's thistle or alcove thistle) is North American species of perennial plants in the sunflower family, found in the Colorado Plateau and Canyonlands regions of the southwestern United States, in the States of Utah and Arizona.
Perennial rice are varieties of long-lived rice that are capable of regrowing season after season without reseeding; they are being developed by plant geneticists at several institutions.
 Although these varieties are genetically distinct and will be adapted for different climates and cropping systems, their lifespan is so different from other kinds of rice that they are collectively called perennial rice.
 Perennial rice—like many other perennial plants—can spread by horizontal stems below or just above the surface of the soil but they also reproduce sexually by producing flowers, pollen and seeds.
 As with any other grain crop, it is the seeds that are harvested and eaten by humans.
Cirsium wrightii (Wright's marsh thistle) is an endangered species of North American plants in the sunflower family.
 It is a monocarpic perennial sometimes reaching as much as 300 cm (10 feet) in height.
Cassida panzeri is a species of beetle in the leaf beetle family, that can be found in the Palearctic region, and in the Honshu province of Japan.
 The host plants are in the Asteraceae family, and include "Arctium lappa", "Scorzonera humilis", "Taraxacum officinale", "Tragopogon pratensis" and "Cirsium" species (including "Cirsium arvense" and "Cirsium vulgare").
Orontium , sometimes called golden-club, is a genus of flowering plants in the family Araceae.
 The single living species in the genus is "Orontium aquaticum", while the two other described species, "Orontium mackii" and "Orontium wolfei", are known from fossils.
Cirsium is a genus of perennial and biennial flowering plants in the Asteraceae, one of several genera known commonly as thistles.
 They are more precisely known as plume thistles.
 These differ from other thistle genera ("Carduus", "Silybum" and "Onopordum") in having feathered hairs to their achenes.
 The other genera have a pappus of simple unbranched hairs.
Cirsium setidens, also known as gondre and Korean thistle in English, and Goryeo eongeongkwi (고려엉겅퀴 ) and gondeure (곤드레 ) in Korean, is a perennial plant in the genus "Cirsium" in the aster family.
 It grows naturally in submontane and mountainous area in Korean peninsula where its young leaves are used as namul.