The only organization visible was a grouping of the tissues into tumor "units" of xylem, surrounded by meristematic cells and phloem. Published by the Botanical Society of America continuously since ...

American Journal of Botany, Vol. 45, No. 5 (May, 1958), pp. 418-431 (14 pages) This paper initiates a series of investigations on the vegetative anatomy and morphology of Humulus lupulus. A brief ...