Petuvirus is a genus of viruses, in the family Caulimoviridae.
 Plants serve as natural hosts.
 There is currently only one species in this genus: the type species Petunia vein clearing virus.
 Diseases associated with this genus include: plants: chlorotic vein clearing, leaf malformation.
Polerovirus is a genus of viruses, in the family Luteoviridae.
 Plants serve as natural hosts.
 There are currently 17 species in this genus including the type species Potato leafroll virus.
 Diseases associated with this genus include: PLRV causes prominent rolling of the leaves of potato and a stiff upright habit of the plants; necrosis of the phloem and accumulation of carbohydrates in the leaves.
The gypsum flora of Nova Scotia refers to a small grooup of plants that are restricted to naturally-occurring outcrops of gypsum.
 Nova Scotia is unique in northeastern North America for the extent of sites having gypsum bedrock at or near the soil surface.
 The distinctive set of plants associated with these gypsum exposures includes "Packera paupercula" (Balsam groundsel), "Carex eburnea" (Ebony gedge), "Erigeron hyssopifolius" (Hyssop-leaved fleabane), "Cypripedium parviflorum" (Small yellow lady’s-slipper).
 Karst landscapes have also formed.
 Some of these species appear to be associated with sunny clearings created by natural erosion from gypsum cliffs, which provides a distinctive sunny and calcareous habitat within landscapes that are otherwise forested.
Atropa is a genus of flowering plants in the nightshade family, Solanaceae : tall, calcicole, herbaceous perennials (rhizomatous hemicryptophytes), bearing large leaves and glossy berries particularly dangerous to children, due to their combination of an attractive, cherry-like appearance with a high toxicity.
 Atropa species favour temperate climates and alkaline soils, often growing in light shade in woodland environments associated with limestone hills and mountains.
 Their seeds can remain viable in the soil for long periods, germinating when the soil of sites in which plants once grew (but from which plants have long been absent) is disturbed by human activity or by natural causes, e.g. the windthrow of trees (a property shared by the seeds of other Solanaceae in tribe Hyoscyameae e.g. those of Hyoscyamus spp., the henbanes).
 The best-known member of the genus Atropa is Deadly Nightshade ("A. belladonna") - the poisonous plant "par excellence" in the minds of many.
 The pharmacologically active ingredients of Atropa species include atropine, scopolamine, and hyoscyamine, all tropane alkaloids having anticholinergic, deliriant, antispasmodic and mydriatic properties.
 The genus is named for Άτροπος ("Atropos") - lit.
 'she who may not be turned (aside)' - one of the Three Fates and cutter of the thread of life / bringer of death - in reference to the extreme toxicity of "A.belladonna" and its fellow species - of which three others are currently accepted.
Camassia is a genus of plants in the asparagus family native to Canada and the United States.
 Common names include camas, quamash, Indian hyacinth, camash, and wild hyacinth.
Christmas plants are various flowers or vegetation from garden plants associated with the festive season of Christmas.
Nothocestrum breviflorum, commonly known as smallflower ʻ aiea, is a species of tree in the nightshade family, Solanaceae, that is endemic to the island of Hawaiʻ i.
 It inhabits dry and mixed mesic forests at elevations of 180 - .
 These forests are dominated by ʻ ōhiʻ a lehua ("Metrosideros polymorpha") and koa ("Acacia koa") or lama ("Diospyros sandwicensis"), while plants associated with smallflower ʻ aiea include wiliwili ("Erythrina sandwicensis") and uhiuhi ("Caesalpinia kavaiensis").
 "N. breviflorum" reaches a height of 10 - .
 It is threatened by habitat loss.
 It is federally listed as an endangered species of the United States.
 There are fewer than 50 individuals remaining.
Eriocaulon is a genus of about 400 species commonly known as pipeworts, of monocotyledonous flowering plants in the family Eriocaulaceae.
 The genus is widely distributed, with the centers of diversity for the group occurring in tropical regions, particularly southern Asia and the Americas.
 A few species extend to temperate regions, with ca. 10 species in the United States, mostly in the southern states from California to Florida, and only two species in Canada; China has 35 species, also mostly southern.
 Only one species ("E. aquaticum") occurs in Europe, where it is confined to the Atlantic Ocean coasts of Scotland and Ireland; this species also occurs in eastern North America and is thought to be a relatively recent natural colonist in Europe.
 In the Americas, "Eriocaulon" is the only genus in its family that occurs north of Florida.
 They tend to be associated with wet soils, many growing in shallow water, in wetlands, or in wet savannas like flatwoods.
 In wet soils, their abundance appears to be related to water levels, fire frequency, and competition from other plants such as grasses.
 Experiments have shown that they are weak competitors compared to many other wetland plant species.
 Some species can persist as buried seeds during unfavorable conditions.
 The scientific name is derived from Ancient Greek εριον, "erion", meaning 'wool', and καυλός, "caulos", meaning 'stalk'.
Deathcamas or death camas refers to several species of flowering plant in the tribe Melanthieae.
 The name alludes to the great similarity of appearance between these toxic plants, which were formerly classified together in the genus "Zigadenus", and the edible camases ("Camassia"), with which they also often share habitat.
 Other common names for these plants include deadly zigadene, hog potato and mystery-grass.
Acorus is a genus of monocot flowering plants.
 This genus was once placed within the family Araceae (aroids), but more recent classifications place it in its own family Acoraceae and order Acorales, of which it is the sole genus of the oldest surviving line of monocots.
 Some older studies indicated that it was placed in a lineage (the order Alismatales), that also includes aroids (Araceae), Tofieldiaceae, and several families of aquatic monocots (e.g., Alismataceae, Posidoniaceae).
 However, modern phylogenetic studies demonstrate that "Acorus" is sister to all other monocots.
 Common names include calamus and sweet flag.

Question: Which genus of plants has more plants associated with it, Camassia or Acorus?
Answer: Camassia