Fastigiate

a.	1.	Narrowing towards the top.
	2.	(Bot.) Clustered, parallel, and upright, as the branches of the Lombardy poplar; pointed.
	3.	(Zool.) United into a conical bundle, or into a bundle with an enlarged head, like a sheaf of wheat.

Adj.

1.

fastigiate - having clusters of erect branches (often appearing to form a single column)

botany, erect, phytology, upright, vertical