Flora of Marcus Island

Portulaca lutea, the native yellow purslane, is a species of Portulaca that is indigenous to all of the main islands of Hawaii except for Kaua'i and is widespread throughout the Pacific Islands.

Pisonia grandis, the grand devil's-claws, is a species of flowering tree in the Bougainvillea family, Nyctaginaceae.

Heliotropium arboreum is a species of flowering plant in the family Heliotropiaceae. It is native to tropical Asia including southern China, Madagascar, northern Australia, and most of the atolls and high islands of Micronesia and Polynesia. Common names include velvetleaf soldierbush, tree heliotrope, veloutier, and octopus bush. It is a shrub or small tree typical of littoral zones reaching a height of 3.6 m (12 ft), with a spread of about 5 m (16 ft).

Digitaria setigera, also more commonly called East Indian crabgrass, is a species of perennial grass in the family of Poaceae.

Scaevola taccada, also known as beach cabbage, sea lettuce, or beach naupaka, is a flowering plant in the family Goodeniaceae found in mangrove swamps and rocky or sandy coastal locations in the tropical areas of the Indo-Pacific. It is a common beach shrub throughout the Arabian Sea, the tropical Indian Ocean and the tropical islands of the Pacific Ocean. There has long been confusion over the correct scientific name for this species. It is also known by the synonym Scaevola sericea.

Lepturus (common name thintail) is a genus of plants in the grass family, native to Asia, Africa, Australia, and various islands in the Indian and Pacific Oceans. Species Lepturus anadabolavensis A.Camus - Madagascar Lepturus androyensis A.Camus - Madagascar Lepturus boinensis A.Camus - Madagascar Lepturus calcareus Cope - Socotra Lepturus copeanus B.K.Simon - Australia Lepturus geminatus C.E.Hubb. - Australia Lepturus humbertianus A.Camus - Madagascar Lepturus minutus B.K.Simon - Queensland Lepturus nesiotes Cope - Socotra Lepturus perrieri A.Camus - Madagascar Lepturus pulchellus (Balf.f.)

Pisonia is a genus of flowering plants in the four o'clock flower family, Nyctaginaceae. It was named for Dutch physician and naturalist Willem Piso (1611–1678). Certain species in this genus are known as catchbirdtrees, birdcatcher trees or birdlime trees because they catch birds. The sticky seeds are postulated to be an adaptation of some island species that ensures the dispersal of seeds between islands by attaching them to birds, and also allows the enriching of coralline sands. (Should a fledgling fall to the ground, become entangled in the Pisonia's sticky seeds, and be unable to free

Guilandina bonduc, commonly known as nicker nut amongst other names, is a species of flowering plant in the bean family Fabaceae that has a mostly pantropical distribution. It is a scrambling, thorny shrub or vine that is mostly found close to coastlines, and was first described in 1753 by Carl Linnaeus.

Scaevola (; SE(E)V-ə-lə) is a genus of flowering plants in the Goodenia family, Goodeniaceae. It consists of more than 130 species, with the center of diversity being Australia and Polynesia. There are around 80 species in Australia, occurring throughout the continent, in a variety of habitats. Diversity is highest in the South West, where around 40 species are endemic. Common names for Scaevola species include scaevolas, fan-flowers, half-flowers, and naupaka, the plants' Hawaiian name. The flowers are shaped as if they have been cut in half. Consequently, the generic name means

Guilandina is a genus of flowering plants in the legume family, Fabaceae. It belongs to the subfamily Caesalpinioideae and tribe Caesalpinieae. The genus was named after Melchior Wieland (1515–1589), a Prussian naturalist who "Italianized" his name as "Guilandini" upon moving to Italy.

Ipomoea pes-caprae, also known as bayhops, bay-hops, beach morning glory, railroad vine, or goat's foot, is a common pantropical creeping vine belonging to the family Convolvulaceae. It grows on the upper parts of beaches and endures salted air. It is one of the most common and most widely distributed salt tolerant plants and provides one of the best known examples of oceanic dispersal. Its seeds float and are unaffected by salt water. Originally described by Linnaeus, it was placed in its current genus by Robert Brown in 1818.

Boerhavia is a genus of over 100 species in the Nyctaginaceae family. The genus was named for Herman Boerhaave, a Dutch botanist, and the genus name is frequently misspelled "Boerhaavia". Common names include spiderlings and hogweeds.

Portulaca ( POR-chə-LAK-ə, UK also POR-tyuul-AK-ə, US also POR-chə-LAH-kə) is a genus of flowering plants in the family Portulacaceae, and is the type genus of the family. With over 100 species, it is found in the tropics and warm temperate regions. Portulacas are also known as the purslanes. Common purslane (Portulaca oleracea) is widely consumed as an edible plant, and in some areas it is invasive. Portulaca grandiflora is a well-known ornamental garden plant. Purslanes are relished by chickens. Some Portulaca species are used as food plants by the larvae of some Lepidoptera species

Ipomoea is the largest genus in the plant family Convolvulaceae, with over 600 species. It is a large and diverse group, with common names including morning glory, water Convolvulus or water spinach, sweet potato, bindweed, moonflower, etc. The genus occurs throughout the tropical and subtropical regions of the world, and comprises annual and perennial herbaceous plants, lianas, shrubs, and small trees; most of the species are twining climbing plants.

Heliotropium is a genus of flowering plants with around 325 species commonly known as heliotropes. They are highly toxic to dogs and cats, as well as to humans.

Digitaria is a genus of plants in the grass family native to tropical and warm temperate regions but can occur in tropical, subtropical, and cooler temperate regions as well. Common names include crabgrass, finger-grass, and fonio. They are slender monocotyledonous annual and perennial lawn, pasture, and forage plants; some are often considered lawn pests. Digitus is the Latin word for "finger", and they are distinguished by the long, finger-like inflorescences they produce.