5* Bacopa salzmannii
It is perhaps most similar to the more familiar B. caroliniana, and may be cultivated under the same conditions. Unlike the former plant, it remains a bit smaller and the central vein of each leaf is often distinctly reddish. Under very strong light and with sufficient trace elements, the reddish line may not be as apparent; under low light and with few micronutrients, the entire plant may remain green. The addition of carbon dioxide is certainly helpful, but not required.