Sailor Manyo Yomogi is a dark teal fountain pen ink with medium shading and medium pink sheen. It dries in 15 seconds in a medium nib on Rhodia and has a wet flow. Made in Japan, it is available in a square 50ml bottle.

The Man'yōshū is a collection of Japanese poems which features approximately 4,000 entries collected over 400 years--1,500 of those relate to plants and flowers. Also known as the Collection of Ten Thousand Leaves, the anthology is one of Japan's most revered poetic compilations and mentions more than 150 species of plants. The Manyo line of inks from Sailor pays homage to various plants and flowers that have been mentioned. 

Artemisia princeps, aka yomogi or Japanese mugwort, is a perennial plant in the sunflower family that is native to China, Japan, and Korea. It grows very quickly and can become invasive. The leaves can be eaten in soups or rice, or turned into tea.