Source: MOBOT, Tropicos.org^[1]

Source: PlantaPhile^[3]

Source: PlantaPhile^[4]

Red pigmented fragment of the anther as a result of the reaction with chloral hydrate observed at 400x with Acidified Chloral Hydrate Glycerol Solution.
Source: Elan M. Sudberg, Alkemist Laboratories^[5]

Thick-walled trichome showing rough cuticle observed at 400x with Acidified Chloral Hydrate Glycerol Solution.
Source: Elan M. Sudberg, Alkemist Laboratories^[6]

Euphrasia officinalis HPTLC ID - Vanillin/Sulfuric Acid Reagent UV 365 nm

Eyebright (aerial parts) (Euphrasia officinalis)

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

1. 2 μL Aucubin ~0.1% in CH3OH
2. 3 μL Euphrasia officinalis-1 (aerial parts)
3. 3 μL Euphrasia officinalis-2 (aerial parts)
4. 3 μL Euphrasia officinalis-3 (aerial parts)
5. 3 μL Euphrasia officinalis-3 (aerial parts)
6. 3 μL Euphrasia officinalis-4 (aerial parts)
7. 3 μL Euphrasia officinalis-5 (aerial parts)
8. 2 μL Catalpol ~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 chloroform: methanol: water [6/4/0.4] 

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

Detection Method Vanillin/H2SO4 Reagent -> 110° C 5 min -> UV 365 nm 

Reference see Herbal Drugs and Phytopharmaceuticals, Max Wichtl, 3rd ed., 2004

Source: Elan M. Sudberg, Alkemist Laboratories ^[7]