Spanish Needles Seen in Butterfly World 1.0 (image) Pensoft Publishers Share Print E-Mail Caption In the real world, Spanish needles (Bidens alba) is considered a weed in South Florida. However, it is an excellent nectar source for butterflies. Credit Alban Delamarre Usage Restrictions CC-BY 4.0 Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.