1) Division 2) Division rhodophyta 3) Lower plants 
division of algae known as red algae (q.v.).
<botany> Division of algae, many of which have branching filamentous forms and red colouration. The latter is due to the presence of phycoerythrin. ... The food reserve is floridean (starch), found outside the plastid. The walls contain sulphated galactans such as carrageenan and agar. ... (23 Aug 1998) ... 
(= red algae) Division of algae, many of which have branching filamentous forms and red coloration. The latter is due to the presence of phycoerythrin. The food reserve is floridean (starch), found outside the plastid. The walls contain sulphated galactans such as carrageenan and agar.
[n] - lower plants
division Rhodophyta noun lower plants; mostly marine and littoral eukaryotic algae