the alga vaucheria

Vaucheria:
Synonyms = water felt
Reproduction = asexual by fragmentation of filaments or zoospores and sexual by oogamy.

Vaucheria is a salt-water, yellow-green alga (Xanthophyte), in the Heterokont Kingdom.

Xanthophytes (yellow-green algae):
>600 species, PS, fresh and marine waters, Chl a and c1 and c2 and NO fucoxanthin or Chl b.  Cell wall, but not of cellulose or chitin.  Food reserve = oil or fat, not starch typically. Haploid nucleus with outer membrane continuous with ctER. Sessile or free-living; motile flatellated unicells to colonies to siphonaceous (coenocytic) multinucleated filaments, to multicellular filaments.

Heterokont (=stramenopile = chromista) description:
Members of the Kingdom Chromista or Heterokontae exhibit the following characteristics: tubular mitochondria, motile cell with two different flagella. They vary from unicellular flagellates to large, siphonaceous filaments. They include diatoms, raphidiophytes, chrysophytes (golden algae), oomycota (water molds), phaeophytes (brown algae and kelps), haptophytes, silicoflagellata, and the xanthophyta (yellow-green algae including Vaucheria).

Vaucheria exhibits a siphonaceous morphology with a large vacuole and a thin layer of multinucleate cytoplasm containing numerous chloroplasts.

Chloroplasts
The chloroplasts of Vaucheria litorea have the standard four membranes surrounding them when seen within the algal cytoplasm. When isolated, they have only the standard double envelope.