Flower unisexual

Ovary inferior flowers unisexual, the male often in catkin-like spikes calyx small or absent petals absent—.Order Juglandales... 

Flowers unisexual, monoecious, ovules solitary, pendulous.Order Eriocaulales... 

Description Herbaceous annual with a taproot. Stems 20-100 cm tall, pubescent. Leaves ovate-rhomboid, apex obtuse. Inflorescence a dense panicle bracts lanceolate. Flowers unisexual. Pistillate flowers with 5 tepals and 3 stigmas. Staminate flowers at top of inflorescence tepals 5, stamens 3-5. Seeds shiny black, lenticular, contained in circumscissile utricles. 

Description Herbaceous perennial, with a thick caudex. Stems 10-60 cm tall, densely leafy. Caudex leaves scale like stan leaves alternate, sessile, linear-lanceolate, 2-6 cm long, 3-15 mm wide, slightly serrate. Inflorescences cymose, dense, compact. Flowers unisexual or occasionally bisexual. Sepals linear or triangular, 1.5-3 mm long. Petals 3-A mm long, brownish-red, pink or yellow. Fruits paired elongate follicles with curved apical beaks. 

SUBFAMILY TRIBE Genera including polyandrous species Stamen number Flowers unisexual (0) bisexual (1) Inflorescence unisexual (0) bisexual (1) Plant unisexual (0) bisexual (1)... 

Most species of angiosperms produce hermaphroditic flowers. The unisexuality in some plants most often results from developmentally programmed abortion or selective reduction in sex organ primordia. In dicots, higher levels of auxins, cytokinins, and ethylene usually correlate with female sex expression and in most of them the femaleness is mainly promoted by ethylene. ... 

The Annonaceae consist of trees, shrubs, or lianas with simple, alternate, entire, pin-nately veined, typically distichous leaves (Cronquist, 1993). Often, the leaves possess secretory cells. The flowers are solitary or in various sorts of mostly basically cymose inflorescences, mostly entomophilous. The flowers are perfect or rarely unisexual. The petals are commonly trimerous perianths sepals (2) 3 (4) petals commonly come in six or two series of three (Cronquist, 1993). The seeds are often arillate, X = 7, 8,9. 

Ovary superior flowers perfect, polygamous, or unisexual calyx and corolla usually present.Order Sapindales... 

Flowers mostly choripetalous and not in umbels epigynous hypanthium frequent if sympetalous then herbs with unisexual flowers and often climbing by tendrils. 

Carpels superior, free or only slightly united at the base, or gynoecium reduced to one carpel with one stigma, or if syncarpous then small herbs with spikelike racemes of small ebracteate flowers, or aquatics with inferior unisexual flowers with ovules spread all over the inner surface of the ovary. 

Flowers perfect or unisexual and monoecious, though sometimes separated on the spadix and often accompanied by... 

Ament (Catkin) A racemose inflorescence consisting of a close, bracted spike, usually deciduous when mature, bearing many unisexual apetalous flowers. 

POLYGAMOUS Bearing both hermaphrodite and unisexual flowers on the same plant also having more than one mate at the same time. 

The flowers of most species in this family are small, yellow, and aromatic. Some species have bisexual flowers containing both male and female organs. Some species have unisexual flowers, with each flower having either male organs or female organs. Some species are polygamous, in that individuals have some flowers which are bisexual, and others that are unisexual. 

Polygamous—Plants that have some unisexual and some bisexual flowers. 

Unisexual—Flowers that bear either male or female reproductive organs. 

The mulberry family occurs primarily in tropical and semi-tropical regions, and includes a wide variety of herbs, shrubs, and trees, characterized by a milky sap and reduced, unisexual flowers. This family includes 40 gen-... 

Palm flowers are occasionally bisexual, but usually they are unisexual. When unisexual, the flowers of each sex may be on the same plant or, as in humans, only one sex is found per individual. The flowers are small and are generally borne on large, many-branched stems (inflorescences) that are located within the crown or Jirst below it Flower parts are normally in threes. The pollination biology of palms is not well studied, nevertheless, both wind and insect pollinaticn ate ccnrmcn in the family. 

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. 

VI. Order Urticales.—Ulmacem or Elm Family.—Forest trees indigenous to the temperate and tropical zones, charcterized by being woody plants, with pinnately-veined leaves and caducous stipules and Avithout milky juice. Their flowers are unisexual or hermaphroditic with six or four parts to the perianth. Fruit a samara. 

Moracece or Mulberry Family.—Mostly shrubs or trees, rarely herbs, perennials, many of them containing a milky juice, with small axillary, clustered or solitary unisexual flowers, variously colored leaves ovate with serrate margin and having caducous stipules fruit an akene enclosed by the perianth. 

Bixacea Family.—Tropical shrubs or trees. Leaves alternate, siniple with minute or no stipules. Flowers hermaphrodite or unisexual, regular-, stamens hypogynous, mostly indefinite with anthers opening by slits, rarely by one or two apical pores Bixa). Fruit fleshy or dry. Seeds with fleshy albumen and sometimes covered with a flashy arillus Bixa Orellana). 

Catkihi a spike with unisexual flowers, the male catkins fall-... 

Flowers Bisexual or unisexual Small Regular or irregular Three to five petals Ovary superior, usually syncarpous... 

Moreover, the much-discussed Early Cretaceous fossil angiosperm Archae-fructus (Archaefructaceae) and the recently recognized extant near-basal angiosperm Trithuria (Hydatellaceae) are unhelpfully ambivalent in both senses (Rudall et al., 2008 Rudall and Bateman, 2010). The reproductive truss of Archaefructus has been interpreted as being either a single flower lacking axial condensation (Sun et al., 2002) or an inflorescence of several unisexual flowers, the males... 

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