A Grammatical Dictionary of Botanical Latin

tiny, minute: atomicus,-a,-um (adj.A), atomisticus,-a,-um (adj.A); diminutivus,-a,-um (adj.A), unusually small, smaller than usual; tiny; microscopicus,-a,-um (adj.A), very small, at a small magnification; minutus,-a,-um (adj.A), pusillus,-a,-um (adj.A), very small; perpusillus,-a,-um (adj.A): very, very small; lilliputanus,-a,-um (adj.A), liliputianus,-a,-um (adj.A), ‘small enough to inhabit the land of Lilliput in Swift's Gulliver's Travels’ (Stearn 1983); see micro-: in Gk. comp., little, small, tiny; in Latin parvi-, q.v.; see dwarf; pico- (from the Italian), the prefix represents very very small numbers, ‘one trillionth part of’ a unit, such as a picogram; it has been used in the generic name Picobryum, ‘small moss’, rather minute moss, a diminutive species from South Africa.

Fraxinus americana var. microcarpa, “tiny-fruited” (Fernald 1950).

Pusillanthus; Picobryum atomicum.