''Alfaroa williamsii'' is a tropical monoecious cloud forest dwelling species of tree first recognized in the Cordillera Central of

Nicaragua Nicaragua (; ), officially the Republic of Nicaragua (), is the largest country in Central America, bordered by Honduras to the north, the Caribbean to the east, Costa Rica to the south, and the Pacific Ocean to the west. Managua is the countr ...

at an altitude of 1.3 km. The mature tree is 15–25 m in height, with a 0.5 m DBH. The sub-opposite to alternate

pinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ...

ly compound leaves bear three to five opposite to sub-opposite pairs of

coriaceous This glossary of botanical terms is a list of definitions of terms and concepts relevant to botany and plants in general. Terms of plant morphology are included here as well as at the more specific Glossary of plant morphology and Glossary o ...

leaflets, glabrous above and covered with minute scales below. The pollen is born on panicles consisting of several erect catkins. The small, nearly round, glabrous, ribbed fruits are born on a sparsely flowered spike. The sub-species ''A. williamsii'' subsp. ''tapantiensis'' has been recognized by D. Stone.

References and external links

*Antonio Molina R. "Two New Nicaraguan Juglandaceae" ''Fieldiana: Botany'' 31(16), Field Museum of Natural History, Chicago, IL. 357–359. williamsii {{Fagales-stub