noun or noun phrase?

I have been doing some tree diagrams and I have come across this: Výsledky obrázk


Why is the word 'chef' marked as noun and not a noun phrase? In Student's Introduction to English Grammar you may find this: So we prefer to say that a noun phrase (henceforth NP) normally consists of a noun with or without various dependents. (In other words, the head is accompanied by ZERO OR MORE dependents.)

Thank you

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Originally Posted by tom3m

In Student's Introduction to English Grammar you may find this: So we prefer to say that a noun phrase (henceforth NP(1)) normally consists of a noun(2) with or without various dependents(3). (In other words, the head is accompanied by ZERO OR MORE dependents.)

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In that paricular sentence,
(1) the noun phrase is 'the chef',
(2) the noun is 'chef'
(3) the dependent is 'the'.

Thank you

What if there's a zero article before a plural noun, for example:

Oranges grow on trees.

Would the word oranges be marked as an NP or just N?

It would be marked as an NP consisting of a single N only in that method of sentence analysis.