monospermous

Fruit: the receptacle of the flowerets ripens to a globe bristling with the remains of the calyces, like a berry covered with many smaller ones, each containing 2 monospermous, quadrangular seeds.

The Medicinal Plants of the Philippines Jerome Beers Thomas 1891

The American species of the Linnean genus Tribulus are distinguishable from the rest of the published species, by having ten monospermous cocci, by their persistent calyx, and the absence of glands subtending the 5 filaments opposite to the sepals.

Expedition into Central Australia Charles Sturt 1832

A species of Stravadium attracted our attention by its loose racemes of crimson coloured flowers, and of large three or four ribbed monospermous fruit; it was a small tree, with bright green foliage, and was the almost constant companion of the permanent water-holes.

Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845 Ludwig Leichhardt 1830