Lilium ovary: 

contains several ovules.
 
each ovary  contans diploid megaspore mother cell in a chamber called the megasporangium.

Tissue called integuments,  surround the megasporangium;
 
The integuments will eventually become the seed coat.

Lilium anthers

  microspore divides by mitosis to form a male gametophyte or pollen grain.
 
Pollen can be transported by wind (grasses usually), insects (most of the colorful flowers), and by night flying moths and small mammals (bats and mice).
 

Flower parts in 3's or multiple of 3's; one cotyledon inside seed; parallel leaf venation; includes Lilium, Amaryllis, Iris, Agave, Yucca, orchids, duckweeds, annual grasses, bamboos and palms
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Flower parts in 4's or 5's; 2 cotyledons inside seed; branched or net leaf venation; contains the most species of flowering herbs, shrubs and trees; includes roses (Rosa), buttercups (Ranunculus), clover (Trifolium), maple (Acer), basswood (Tilia),

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Gymnosperms include pines (Pinus), spruce (Picea), fir (Abies), hemlock (Tsuga) and false hemlock (Pseudotsuga). Some of the coniferous genera (division Coniferophyta) are the most important timber trees in the world. Since these species have several cotyledons inside their seeds, they are conveniently referred to as polycots.

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Vascular plants contain two main types of conduction tissue, the xylem and phloem
extend from the leaves to the roots, and are vital conduits for water and nutrient transport. In a sense, they are to plants what veins and arteries are to animals.
Xylem tissue conducts water and mineral nutrients from the soil upward in plant roots and stems.

Phloem tissue conducts carbohydrates manufactured in the leaves downward in plant stems.

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Monocot stems, such as corn, palms and bamboos, do not have a vascular cambium and do not exhibit secondary growth by the production of concentric annual rings.

They cannot increase in girth by adding lateral layers of cells as in conifers and woody dicots. Instead, they have scattered vascular bundles composed of xylem and phloem tissue


The following illustrations and photos show scattered vascular bundles in the stem cross sections of corn (Zea mays):

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dicot roots, the xylem tissue appears like a 3-pronged or 4-pronged star.
The tissue between the prongs of the star is phloem.
The central xylem and phloem is surrounded by an endodermis, and the entire central structure is called a stele.

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 (Tilia americana), a typical ring-porous hardwood of the eastern United States: