Fig. 9.3-6c. Transverse section of hemlock leaf (Tsuga caroliniana). Pines are probably the example of conifer that most students are likely to encounter in a Plant Anatomy Laboratory, but there are many other conifers as well. This leaf of hemlock is slightly flattened, not round like the needles of many pines, and there is just a single resin canal, located adjacent to the vascular bundle, just exterior to the phloem.