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- https://bio.libretexts.org/Bookshelves/Botany/Botany_Lab_Manual_(Morrow)/22%3A_Gymnosperms/22.5%3A_Gnetophytes_and_ConifersThe Pinaceae is currently the largest family of conifers, so many of our examples for this group of gymnosperms will be from the type genus Pinus (pines). However, unlike the microsporocytes, only one...The Pinaceae is currently the largest family of conifers, so many of our examples for this group of gymnosperms will be from the type genus Pinus (pines). However, unlike the microsporocytes, only one of the four cells will survive to develop into a megagametophyte and the other three will die. Surrounding the nucellus is the integument, which is initially continuous with the ovuliferous scale and has a small opening called a micropyle.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_(Boundless)/26%3A_Seed_Plants/26.02%3A_Gymnosperms/26.2C%3A_Diversity_of_GymnospermsGymnosperms are a diverse group of plants the protect their seeds with cones and do not produce flowers or fruits.
- https://bio.libretexts.org/Bookshelves/Botany/A_Photographic_Atlas_for_Botany_(Morrow)/07%3A_Gymnosperms/7.03%3A_GnetophytesGnetophytes are a group of strange angiosperm-like plants that are most likely derived from conifers. They have opposite leaves and produce fruit-like strobili. Plants are dioecious, producing microst...Gnetophytes are a group of strange angiosperm-like plants that are most likely derived from conifers. They have opposite leaves and produce fruit-like strobili. Plants are dioecious, producing microstrobili and megastrobili on different individuals. Similar to angiosperms, they produce vessel elements and undergo double fertilization.
- https://bio.libretexts.org/Bookshelves/Botany/Inanimate_Life_(Briggs)/02%3A_Organisms/2.18%3A_Ephedra_-_JointfirEphedra (the common name is also ephedra, and it is also called jointfir) is a representative of a small, diverse group of seed plants that unfortunately has no common name. They are simply called 'th...Ephedra (the common name is also ephedra, and it is also called jointfir) is a representative of a small, diverse group of seed plants that unfortunately has no common name. They are simply called 'the gnetophytes' after the name for the phylum, Gnetophyta.
