Pandanus tectorius vs pandanus

Pandanus tectorius and pandanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pandanus tectorius	Yes	No	No	No
pandanus	Yes	No	No	No

As nouns, pandanus is a hypernym of Pandanus tectorius; that is, pandanus is a word with a broader meaning than Pandanus tectorius:

Pandanus tectorius: Polynesian screw pine
pandanus: any of various Old World tropical palmlike trees having huge prop roots and edible conelike fruits and leaves like pineapple leaves

Other hypernyms of Pandanus tectorius include screw pine.

Pandanus tectorius (noun)	pandanus (noun)
Polynesian screw pine	any of various Old World tropical palmlike trees having huge prop roots and edible conelike fruits and leaves like pineapple leaves
	fiber from leaves of the pandanus tree; used for woven articles (such as mats)