Bract(s) are modified leaves; they usually have a flower or clusters of flowers growing at the leaf stalk that the bract surrounds. Bracts can be small or large. They can be bigger and brighter than the true flowers of a plant, such as in the Arum Lily or Poinsettia.

 

Deciduous plants lose their leaves during a particular season (usually winter).

 

Herbaceous plants do not have a woody structure like a shrub or a tree.

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Perennial essentially means that the plant is expected to live for more than two years: there are evergreen perennials and deciduous perennials.

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Racemes 

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Spadix (pl. Spadices) a spadix is a spike which is often thick and fleshy that has tiny flowers clustered on it. you may not easily see the tiny flowers unless you take a photograph and blow it up, or use macro photography or some other magnifier. [Extra Fun Fact* In some plants the spadix actually produces heat through a process called thermogenesis; , this is particularly in the male pollen producing flowers; this is most probably to attract pollinators such as carrion beetles and flies as the heat helps to volatize the foul smells  they find attractive and it is also a warmer more welcoming environment for them in cooler weathers. The Titan Arum (Amorphophallus titanum) is an example of a plant that does this.]

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Spathe(s) these look like a large flower petal but they are actually a bract, a spathe is a single bract that surrounds a spadix; their job is to attract pollinators to the flower; the spathes often do this by being vibrant colours - the actual flowers are usually small flowers covering a large spike called a spadix (like on an Arum Lily). 

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