Plant reproductive morphology is asexual, producing only spores. Similarly, flowers produced by the sporophyte may be described as "unisexual" or "bisexual", meaning that they give rise to either one sex of gametophyte or both sexes of gametophyte. The flower is the characteristic structure concerned with sexual reproduction in flowering plants (angiosperms). Flowers vary enormously in their construction (morphology). A "complete" flower, like that of "Ranunculus glaberrimus" shown in the figure, has a calyx of outer sepals and a corolla of inner petals. The sepals and petals together form the perianth. Next inwards there are numerous stamens, which produce pollen grains, each containing a
CALYX the work of the Mexican artist Frida Kahlo. CALYX CALYX, Inc. is a non-profit publisher of art and literature by women founded in 1976 based in Corvallis, Oregon. CALYX publishes both "CALYX, A Journal of Art and Literature by Women" twice a year and CALYX Books, which publishes one to three books annually. CALYX is one of the nation's oldest feminist presses. CALYX uses a collective model to make its editorial decisions. Several volunteer editors review and edit an author's work and often work with authors to improve their pieces. All manuscripts are read by a minimum of two editors.