Abstract
Lycopodium gametophytes are known from about 7% of the species (Bruce & Beitel, 1979). It is often difficult to find the subterranean gametophytes of Lycopodium in nature. One way of increasing the number and kinds of subterranean gametophytes for study is to grow them from spores in axenic culture. Two types of subterranean Lycopodium gametophytes, carrotand disc-shaped, have been grown in axenic culture on nutrient media containing minerals and sugar. The structure of these gametophytes was essentially the same as that for gametophytes from nature (Whittier, 1977, 1981). Lycopodium lucidulum represents a third type of subterranean gametophyte. Its gametophytes are axial, white, and fleshy (Spessard, 1922) and do not resemble the discor carrot-shaped gametophytes of L. obscurum and L. digitatum respectively which have been previously grown in culture (Whittier, 1977, 1981). The main goal of this study was to grow this third type of subterranean Lycopodium gametophyte in axenic culture, and to compare its morphology to gametophytes of the same species from nature.
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