Ambrose Nathaniel Henry

Tabernaemontana gamblei is a species of plant in the family Apocynaceae. It is endemic to India.

Syzygium parameswaranii is a species of plant in the family Myrtaceae. It is endemic to Tamil Nadu in India.

Euphorbia santapaui is a species of flowering plant in the family Euphorbiaceae. It is endemic to the southern Western Ghats of Kerala and Tamil Nadu in India. It is threatened by habitat loss.

Utricularia subramanyamii is a terrestrial carnivorous plant that belongs to the genus Utricularia. It is endemic to the Pathanamthitta district in southern India. U. subramanyamii grows in marshy areas. It was originally collected by C. N. Mohanan in 1978 and was formally described by M. K. Janarthanam and Ambrose Nathaniel Henry in 1990 as Utricularia subramanii, later corrected to its current form. The species epithet honors Dr. K. Subramanyam, who was the director of the Botanical Survey of India.

Utricularia malabarica is a small annual carnivorous plant that belongs to the genus Utricularia. It is endemic to southern India and has been collected from the Kasaragod district. U. malabarica grows over wet rocks or lateritic soils in the presence of Eriocaulon species and grasses. It was originally collected by M. K. Janarthanam in 1985 and was formally described by Janarthanam and Ambrose Nathaniel Henry in 1989. It is most closely related to U. lazulina.

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Homalium jainii is a species of plant in the family Salicaceae. It is endemic to Tamil Nadu in India. It can grow up to 30 meters tall and has grey bark. The flowers are around 10-12 millimeters across, and are bisexual, meaning they have both male and female parts.

Zenkeria sebastinei is a species of grass in the family Poaceae found in Pothigai Hills, Kerala, India.

Symplocos nairii is a species of plant in the family Symplocaceae. It is endemic to India. Known to be a shrub or small tree, up to 8 m tall; young branchlets angular, glabrous. Leaves simple, alternate, spiral, 7-10 x 4.5–5 cm, elliptic to obovate, apex obtuse, base subcordate and asymmetric, margin serrate, glabrous; midrib canaliculate above; secondary nerves ca. 8 pairs; tertiary nerves obliquely and distantly percurrent; petiole ca. 0.3 cm long, planoconvex in cross section, glabrous. Flowers axillary, solitary or racemes, 1–2 cm long; flowers sessile. Drupe, cylindrical or ellipsoid,

Neodistemon is a monotypic genus of flowering plants belonging to the family Urticaceae. The only species is Neodistemon indicus. Its native range is from the Indian subcontinent to Indo-China.

Memecylon subramanii is a species of plant in the family Melastomataceae. It is endemic to India.

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Indobanalia is a monotypic genus of flowering plants belonging to the family Amaranthaceae. The only species is Indobanalia thyrsiflora. Its native range is India.

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