parastichy

noun, plural pa·ras·ti·chies. Botany.

1. one of a number of seemingly secondary spirals or oblique ranks winding around the stem or axis to the right and left in a spiral arrangement of leaves, scales, etc., where the internodes are short and the members closely crowded, as in the houseleek and the pine cone.

noun plural -chies

1. a hypothetical spiral line connecting the bases of a series of leaves on a stem
2. an arrangement of leaves so connected