Dioecious

Amaranthus Palmeri S. Wats., Palmer amaranth, is a coarse, weedy, drought-resistant, dioecious member of the Amaranthaceae and is related to A. retroflexus L., redroot pigweed, and the ornamentals k. tricolor L., sumner poinsettia, and /. caudatus L., love-lies-bleeding. Palmer amaranth was used by natives of the North American desert as a protein source and cereal to supplement maize and beans. Another member of the same family, A. spinosus L., spiny amaranth, has been reported to exhibit allelopathic activity toward coffee... 

Cannabis is usually dioecious (male and female flowers on separate plants). The female plants are widely believed to contain more THC than the males, but this varies from strain to strain. In India, the males are apparently weeded out before... 

Female flowers of dioecious trees are better defended than males. RuflFed grouse, Bonasa umbellus, prefer male flowers of quaking aspen, Populus tremuloides, in winter, and leaves of male specimens in summer (Svoboda and Gullion 1972). Ruffed grouse also feed more on male trees of balsam poplar (Bryant etal, 1991). 

Cannabis sativa L. (hemp) is a dioecious annual flowering plant. Marihuana is the Spanish name for the dried leaves and female flowering tops of the hemp plant. Hashish is the resin which originates from these female flowering tops. The hemp s natural homeland is most likely in the regions north of Afghanistan and the Altai mountains of southern Siberia (Russia). It is not clear when and where cultivation of hemp Cannabis sativa L.) started. It seems most likely that the cultivation of hemp may have originated in northeastern Asia (north and north-east China and southeastern Siberia). 

I Protoplasmic continuity between cells not obvious monoecious or dioecious gametophytes often present, sporophyte represented by the... 

Sporophyte bearing sporangia in sori monoecious or dioecious gametophytes alternating with similar or smaller sporophytes.Order Cutleriales... 

B Female sporophylls usually in cones, male sporophylls always in cones all strictly dioecious strobili terminal leaves always pinnately compound.Class Cycadeae.Order Cycadales... 

Leaves usually alternate, stipulate flowers normally dioecious and without a perianth. 

Leaves alternate or opposite, exstipulate flowers normally dioecious, with or without a calyx, petals absent. 

Flowers dioecious, or if monoecious then aquatics with the flowers in globose clusters or in dense cylindric spikes. 

Dioecious In the lower plants referring to the individuals having the archegonia and antheridia on separate plants referring also to those seed plants having staminate and pistillate flowers borne on different individuals. 

The plant is a low, dioecious, practically leafless shrub, 60 to 90 cm high. The stem, green in color, is slender, erect, small ribbed and channeled, 1.5 mm in diameter, and usually terminates in a sharp point. Nodes are 4 to 6 cm apart, at which the leaves appear as whitish triangular scarious sheaths. Small blossoms appear in the summer. 

Cannabis sativa is dioecious, which means that it produces both male and female plants. All types of cannabis strains—both male and female plants—produce THC, the active ingredient that, when smoked or ingested, intoxicates the user. This substance can be detected in every part of the plant, including the stems. The highest concentration of THC, however, is found in the resin, which is most abundant in the flowers of female plants. 

Of the drugs that are contained in cannabis products, it is A -tetrahydrocannab-inol (A -THC) (1) which is responsible for the pharmacological activity of cannabis. This compound is formed in the glandular trichomes (see below) which are found on the surface of the plant. Cannabis sativa is dioecious, that is, it has both male plants and female plants. These are most easily recognized at the flowering stage because the flower structures are different. The female plants are preferred because they produce more of the glandular trichomes and, as a consequence, are richer in cannabinoids. 

Dioecious A plant species which has both male and female characteristics. 

Species of the mulberry family may be either monoecious or dioecious, depending on whether male and female flowers occur on the same plant (monoecious) or on separate plants (dioecious). Flowers of the Moraceae are in tightly packed groups, known as heads, spikes, catkins, or umbels. Fig flowers are produced inside a synconium, a hollow fleshy structure. The small flowers lack petals. Male flowers consist of four sepals, which are usually leaf-like appendages, and four stamens. Female flowers consist of four sepals and a pistil with a two-chambered ovary. 

The papaya is dioecious, that is unisexual, for male and female flowers are borne by separate plants. The flowers are yellow and sweet-smelling and open at night to attract moths, the pollinators of the papaya. 

I. The flowers of Gymnosperms are often monoecious or dioecious but very rarely hermaphrodite, as in Welwitchia, whereas those of Angiosperms are usually hermaphrodite, rather rarely moncecious, still more rarely dioecious. 

Polytrichum commune is quite common in woods, forming a carpet-like covering on the ground beneath tall tree canopies. It is dioecious, the plants being of two kinds, male and female. 

Pinacea Conifercs) or Pine Family.—Trees or shrubs with resinous juice whose wood is characterized by being composed largely of tracheids with bordered pits. Leaves entire, awl- or needle-shaped frequently fascicled, exstipulate, usually evergreen. Flowers, monoecious or rarely dioecious, achlamydeous, in cones. Staminate... 

Inflorescences dioecious spikes, so on separate plants. Staminate spikes forming deciduous catkins of yellowish flowers, pistillate as persistent spikes of green flowers, at length maturing fruit. 

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