Polysiphonia elongella
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| Polysiphonia elongella | |
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| Illustration of Polysiphonia elongella | |
Scientific classification  | |
| Clade: | Archaeplastida |
| Division: | Rhodophyta |
| Class: | Florideophyceae |
| Order: | Ceramiales |
| Family: | Rhodomelaceae |
| Genus: | Polysiphonia |
| Species: | P. elongella |
| Binomial name | |
| Polysiphonia elongella Harvey | |
Polysiphonia elongella Harvey in W.J. Hooker [1] is a branched species of marine red algae in the genus in the Polysiphonia in the Rhodophyta.
This marine alga grows as small cylindrical thalli branching to about 10 cm long. It grows as an erect axis attached by a disk-like holdfast. The main axis is unbranched towards the base but bears lateral branches higher up. Each erect axes is composed of a polysiphonous axis with a central row of cells surrounded[2] 4 perixial cells all of the same length.[3] The branches, unlike Polysiphonia elongate, are only slightly constricted at their base.[3][4][5] Cortication filaments grow downwards in the grooves between the periaxial cells and lower down these form a complete cortication. Trichoblasts are borne near the apices.[3]
Reproduction
Globose cystocarps and bisporangia are recorded, the tetrasporangia are sparse.[3]