| Ptilonia | |
|---|---|
 | |
| Ptilonia willana (ASM AK295881) | |
Scientific classification  | |
| (unranked): | Archaeplastida |
| Division: | Rhodophyta |
| Class: | Florideophyceae |
| Order: | Bonnemaisoniales |
| Family: | Bonnemaisoniaceae |
| Genus: | Ptilonia (Harvey) J. Agardh, 1863 |
| Type species | |
| Ptilonia magellanica (Montagne) J.Agardh | |
| Species | |
See text | |
Ptilonia(Harvey) J. Agardh, 1863 is a genus of red algae in the family Bonnemaisoniaceae. [1] [2]
There are six species: [2]
The sea lettuces comprise the genus Ulva, a group of edible green algae that is widely distributed along the coasts of the world's oceans. The type species within the genus Ulva is Ulva lactuca, lactuca being Latin for "lettuce". The genus also includes the species previously classified under the genus Enteromorpha, the former members of which are known under the common name green nori.
Porphyra is a genus of coldwater seaweeds that grow in cold, shallow seawater. More specifically, it belongs to red algae phylum of laver species, comprising approximately 70 species. It grows in the intertidal zone, typically between the upper intertidal zone and the splash zone in cold waters of temperate oceans. In East Asia, it is used to produce the sea vegetable products nori and gim. There are considered to be 60 to 70 species of Porphyra worldwide and seven around Britain and Ireland where it has been traditionally used to produce edible sea vegetables on the Irish Sea coast. Porphyra is a chief source of plant-based vitamin B12.
Chordariaceae is a family of brown algae. Members of this family are may be filamentous, crustose with fused cells at the base, or they may be terete and differentiated into a central medulla and an outer photosynthetic cortex. They have a sporphytic thallus usually aggregated to form a pseudo-parenchyma.
The Rivulariaceae are a family of cyanobacteria within the Nostocales in which the filaments (trichomes) are tapered from wider at the base to narrower at the tip.
Halymenia a genus of a macroscopic red algae that grows in oceans worldwide. It includes the following species:
Rhodomelaceae is estimated to be the largest red algae family, with about 125 genera and over 700 species.
Bangia is an extant genus of division Rhodophyta that grows in marine or freshwater habitats. Bangia has small thalli with rapid growth and high reproductive output, and exhibits behavior characteristic of r-selected species. The plants are attached by down-growing rhizoids, usually in dense purple-black to rust-colored clumps. The chloroplasts of Bangia, like others in the division Rhodophyta, contain chlorophyll a and sometimes chlorophyll d, as well as accessory pigments such as phycobilin pigments and xanthophylls. Depending on the relative proportions of these pigments and the light conditions, the overall color of the plant can range from green to red to purple to grey; however, the red pigment, phycoerythrin, is usually dominant.
Rhodymenia is a genus of red algae, containing the following species:
Plocamium is a genus of red algae in the family Plocamiaceae. It contains around 40 species and has a cosmopolitan distribution in temperate seas. Plocamium has erect elliptical thalli that grow up to 50 cm (20 in) in length. They are bright red in color with strongly flattened delicately branching fronds that further divide into two to five smaller branchlets.
Laurencia is a genus of red algae that grow in temperate and tropical shore areas, in littoral to sublittoral habitats, at depths up to 65 m (213 ft).
Martensia is a genus of red algae, containing the following species:
Caulerpa sedoides, also known as mini-grapes or bubble caulerpa, is a species of seaweed in the Caulerpaceae family native to Australia.
Crouania is a genus of red algae (Rhodophyta) in the Callithamniaceae family. The name of the genus honours the Crouan brothers, Pierre-Louis Crouan and Hippolyte-Marie Crouan. It was first described by Jacob Georg Agardh in 1842, and the type species is Crouania attenuata.
Champia is a genus of red algae in the family Champiaceae, first described in 1809 by Nicaise Auguste Desvaux