Introduction:
Gymnosperms are a group of seed-producing plants that do not have flowers or fruits. They are characterized by their naked seeds, which are not enclosed in an ovary. Gymnosperms include four major groups: cycads, ginkgoes, gnetophytes, and conifers.

Branched stems in gymnosperms:
Among the gymnosperms, the two genera that have branched stems are Pinus (pines) and Cedrus (cedars).

Pinus (pines):
Pines are a group of coniferous trees that belong to the genus Pinus. They are widely distributed throughout the Northern Hemisphere and are known for their needle-like leaves and woody cones. Pines have branched stems that give rise to multiple branches, forming a bushy or conical shape. The branches of pines are covered with needle-like leaves that are arranged in clusters. The branched stems of pines provide support for the leaves and cones, and also serve as a site for the attachment of the reproductive structures.

Cedrus (cedars):
Cedars are another group of gymnosperms that have branched stems. The genus Cedrus includes several species of evergreen coniferous trees, native to the mountains of the Mediterranean region and western Himalayas. Cedars have a distinctive branching pattern, with branches that spread horizontally and form a broad, pyramidal crown. The branches of cedars bear needle-like leaves that are arranged in spirals along the branches. The branched stems of cedars provide structural support and contribute to the overall shape and appearance of the tree.

Conclusion:
In conclusion, among the given options, both Pinus (pines) and Cedrus (cedars) are gymnosperms that have branched stems. Pines are characterized by their bushy or conical shape, with multiple branches arising from the main stem. Cedars, on the other hand, have a broad, pyramidal crown with horizontally spreading branches. The branched stems of both pines and cedars provide support for the leaves and cones, and contribute to the overall structure and appearance of these gymnosperms.