Hedyotis scabridifolia | |
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Hedyotis scabridifolia, var. stonei collected from southern Guam by Fosberg, 1980 | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Gentianales |
Family: | Rubiaceae |
Genus: | Hedyotis |
Species: | H. scabridifolia |
Binomial name | |
Hedyotis scabridifolia Kaneh. (1935) | |
Varieties | |
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Hedyotis scabridifolia is an herb or small shrub that is endemic to the volcanic soils of the Mariana Islands of Guam, Rota and Saipan. [1]
The taxonomic key to Micronesian Hedyotis species provided by Fosberg et al. indicates that the distinguishing characteristic of Hedyotis scabridifolia is the "distal branching of thyrses," which are ascending and racemiform. It is similar to Hedyotis laciniata but with inflorescence pattern more similar to H. fruticulosa ," and "notable for its long-exserted style." [2]
The variant H. scabridifolia var. scabridifolia (synonym: Hedyotis saipanensis [3] ) is endemic to Saipan and distinguished by the whole plant being puberulent (covered in small hairs). [4]
The variant H. scabridifolia var. stonei, found on Guam and Rota in savannas and disturbed sites, is distinguished by its stems and leaves being glabrous, or smooth. It is named after the botanist, Benjamin Stone, who was one of the collectors. [4]
Hedyotis scabridifolia was first described in 1935 by Japanese botanist, Ryōzō Kanehira, in the journal Transactions, Natural History Society of Formosa. [1] Fosberg et al. also provided a detailed description of the species in 1993. [4]
H. scabridifolia has been observed on Rota on the trail to the Sabana near the highest point of the island (which is around 500 meters elevation) and on Guam at evevations from 60 to 100 meters near Mt. Lamlam, and the Sagua River, Dan Dan, and Umatac. [4] As of 2024, the latest record of observation of the species was in 2000. There are no known photographs of live plants. [5] [6] [7]
The Northern Mariana Islands, officially the Commonwealth of the Northern Mariana Islands, is an unincorporated territory and commonwealth of the United States consisting of 14 islands in the northwestern Pacific Ocean. The CNMI includes the 14 northernmost islands in the Mariana Archipelago; the southernmost island, Guam, is a separate U.S. territory. The Northern Mariana Islands were listed by the United Nations as a non-self governing territory until 1990.
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Francis Raymond Fosberg was an American botanist. A prolific collector and author, he played a significant role in the development of coral reef and island studies.
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Terminalia rostrata is a large tree found only on the Mariana Island of Asuncion. It is a part of the "Terminalia and ravine forest" on the western and southwestern slopes of the island, consisting of scattered Terminalia rostrata in association with Premna serratifolia, Morinda citrifolia,Hibiscus tiliaceus, and Pandanus tectorius. This forest type is described as the best-developed forest in the Mariana Islands north of Saipan, owing to its protection on the lee side of the mountain. The leaves of Terminalia rostrata are most similar to Terminalia catappa, but they have soft hairs similar to that of Terminalia samoensis. It is otherwise most similar to Terminalia foetidissima, although differing in various ways. The species name refers to the strongly beaked fruit. Fruit bats feed on the husks of the seeds. The species was first discovered by Marjorie V. C. Falanruw during an expedition to the far northern Mariana islands in 1972 and was first described by Francis Raymond Fosberg in the journal Phytologia in 1974.
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