Question: What inhabited island hosts the flowering shrub known as the Osteomeles anthyllidifolia?

Documents:
source: Pitcairn Islands
text: Pitcairn Islands The Pitcairn Islands ( ; Pitkern: "Pitkern Ailen "), officially Pitcairn, Henderson, Ducie and Oeno Islands, are a group of four volcanic islands in the southern Pacific Ocean that form the last British Overseas Territory in the Pacific. The four islandsPitcairn, Henderson, Ducie, and Oenoare spread over several hundred miles of ocean and have a total land area of about 47 sqkm . Only Pitcairn, the second-largest island that measures about 3.6 km from east to west, is inhabited.

source: Osteomeles anthyllidifolia
text: Osteomeles anthyllidifolia Osteomeles anthyllidifolia, commonly called ʻ Ūlei, eluehe, uʻ ulei, Hawaiian rose, or Hawaiian hawthorn, is a species of flowering shrub in the rose family, Rosaceae, that is indigenous to Hawaiʻ i (all islands but "Kahoʻ olawe" and "Niʻ ihau"), the Cook Islands, Tonga, Pitcairn Island, and Rapa Iti, Taiwan and the Ryukyu islands of Japan.

source: Brighamia rockii
text: Brighamia rockii Brighamia rockii, known as the Molokai ohaha or Pua ʻ ala in Hawaiian, is a species of flowering plant in the bellflower family, Campanulaceae, that is endemic to the island of Molokaʻ i in Hawaii. "Pua ʻ ala" inhabits mesic shrublands and forests on rocky cliffs from sea level to 470 m on the island's northern windward coast. Associated plants include "ʻ ōhiʻ a lehua" ("Metrosideros polymorpha"), "alaheʻ e" ("Psydrax odorata"), "lama" ("Diospyros sandwicensis"), "ʻ ūlei" ("Osteomeles anthyllidifolia"), and "naupaka" ("Scaevola gaudichaudii").

source: Garrya veatchii
text: Garrya veatchii Garrya veatchii is a species of flowering shrub known by the common names canyon silktassel and Veatch silktassel.

source: Ceanothus foliosus
text: Ceanothus foliosus Ceanothus foliosus is a species of flowering shrub known by the common name Wavyleaf ceanothus.

source: Garrya fremontii
text: Garrya fremontii Garrya fremontii is a species of flowering shrub known by several common names, including California fever bush, bearbrush, and Frémont's silktassel. Both the latter name, and the plant's specific epithet are derived from John C. Frémont

source: Ceanothus griseus
text: Ceanothus griseus Ceanothus griseus is a species of flowering shrub known by the common names Yankee Point, Carmel ceanothus and Carmel creeper. 'Carmel' refers to the Carmel Valley wine region in California.

source: Ceanothus megacarpus
text: Ceanothus megacarpus Ceanothus megacarpus is a species of flowering shrub known by the common name bigpod ceanothus. This "Ceanothus" is endemic to California, where its distribution extends along the Central Coast and includes the Channel Islands.

source: Baccharis sarothroides
text: Baccharis sarothroides Baccharis sarothroides is a North American species of flowering shrub known by the common names broom baccharis, desertbroom, greasewood, rosin-bush and groundsel in English and "escoba amarga" or "romerillo" in Spanish. This is a spreading, woody shrub usually sticky with glandular secretions along the primarily leafless green stems. The small, thick leaves are a few centimeters long and are absent much of the year, giving the shrub a spindly, twiggy appearance. It flowers abundantly with tiny green blooms on separate male and female plants.

source: Vaccinium ovatum
text: Vaccinium ovatum Vaccinium ovatum is a North American species of flowering shrub known by the common names evergreen huckleberry, winter huckleberry and California huckleberry.

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Answer: Pitcairn Islands