Of acrogenous leaves, those only are leaves whose attachment is at right angles with the stem; the rest are divisions of a frond.    From Wordnik.com.  [Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries] Reference

Tissue resembling that of their contemporary conifers imparted the necessary rigidity to their framework; nay, so strangely were they pervaded throughout by the coniferous characteristics, that it seems difficult to determine whether they really most resembled the acrogenous or gymnogenous families.    From Wordnik.com.  [The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed] Reference

Thus the numbers 5 and 4 and their multiples prevail among dicotyledonous and exogenous plants; the number 3 and its multiples occur among monocotyledonous or endogenous plants; while 2 and 4, and multiples of them, are met with among acotyledonous or acrogenous plants.”.    From Wordnik.com.  [Theism: The Witness of Reason and Nature to an All-Wise and Beneficent Creator.] Reference