Axel H. Arriola

Discospermum philippinensis is a species of flowering plant in the family Rubiaceae. The species was described in 2015, and was found on Mt. Banahaw, Tayabas, Quezon Province, Philippines at an elevation of 623 m. This species closely resemble that of D. whitfordii because of its persistent calyx, and prominent disk below the fruit apex. However, the species differs from D. whitfordii due to leaf blades with a much larger dimensions, the leaf apex of which are acute to attenuate, the fruits of which are faintly ribbed, with the thin mesocarp that are smaller, and fewer seeds per locule.

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Kanapia is a genus of flowering plants in the family Rubiaceae. The genus is endemic to the Philippines. It was described when two former Canthium species were transferred to this new genus.

Discospermum reyesii is a species of flowering plant in the family Rubiaceae. The species was described in 2018, and was found on Mount Lantoy, Cebu Province, Philippines. This species closely resemble that of D. whitfordii because of slightly similar leaf blades, leaf apices, and non-ribbed fruits. However, the species differs from D. whitfordii due to its smaller fruits with size of 1 - 1.2 cm, smaller seed size to 1 - 1.4 mm x 1.5 - 2.5 mm dimensions, 4 - 6 seeds per locule, whereas D. whitfordii have 2 - 2.7 cm fruit size, 5 - 6.5 mm x 5 - 6.5(7) mm seed size, and 5 - 12 seeds per locule.

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