Polysiphonia stricta is a small red marine alga in the Division Rhodophyta.
Description
P. stricta grows as small tufts of much branched tufts, growing to no more than 25 cm high. ==Reproduction==
Reproduction
Spermatangial branchlets are formed in clusters at the apices. Cystocarps are on wide stalks and are urceolate. The tetraspores are in series in the final branches. ==Habitat==