Epidermis of the thallus showing highly contoured surface and pink glandular material of Palmaria palmata when viewed at 400x with Acidified Chloral Hydrate Glycerol Solution.
Source: Elan M. Sudberg, Alkemist Laboratories^[1]

Parenchyma cells of the thallus showing pink pigmentation of Palmaria palmata when viewed at 400x with Acidified Chloral Hydrate Glycerol Solution.
Source: Elan M. Sudberg, Alkemist Laboratories^[2]

Palmaria palmata HPTLC ID - 10% Ethanolic H2SO4 ->115° C 15 min -> UV 365 nm

Dulse (seaweed) (Palmaria palmata)

Lane Assignments Lanes, from left to right (Track, Volume, Sample):

1. 15 μL Fucoxanthin ~0.1% in CH3OH
2. 5 μL Palmaria palmata-1 (seaweed)
3. 5 μL Palmaria palmata-2 (seaweed)
4. 5 μL Palmaria palmata-3 (seaweed)
5. 5 μL Palmaria palmata-3 (seaweed)
6. 5 μL Palmaria palmata-4 (seaweed)
7. 5 μL Palmaria palmata-5 (seaweed)
8. 15 μL Fucoxanthin ~0.1% in CH3OH

Reference materials used here have been authenticated by macroscopic, microscopic &/or TLC studies according to the reference source cited below held at Alkemists Laboratories, Costa Mesa, CA. 

Stationary Phase Silica gel 60, F254, 10 x 10 cm HPTLC plates 

Mobile Phase cyclohexane: ethyl acetate: propionic acid [6/3.8/0.2] 

Sample Preparation Method 0.3 g + 3 ml 80% CH3OH sonicated + heated @ 50° C ~ 1 hr 

Detection Method 10% Ethanolic H2SO4 ->115° C 15 min -> UV 365 nm 

Reference see Adapted from Pharmacognosy Phytochemistry Medicinal Plants, Bruneton, J. 1995

Source: Elan M. Sudberg, Alkemist Laboratories ^[3]