Assertion: giant kelp | /r/HasProperty | macrocystis spp
Facets:
Source sentences:
text: The most widely recognized species are the giant kelps (Macrocystis spp.), although numerous other genera such as Laminaria, Ecklonia, Lessonia, Alaria, and Eisenia are described.
text: In ideal conditions, giant kelp (Macrocystis spp.) can grow as much as 30–60 cm vertically per day.