Bidens connata Muhl., var. gracilipes, n. var., foliis primariis lobatis, lobis 2—4 basilaribus divergentibus decurrentibus, lobo terminali foliisque superioribus lanceolato-attenuatis anguste serratis dentibus subfalcatis, petiolis gracilibus vix marginatis; achaeniis exterioribus 3—4 mm. longis, interioribus 4.5—5 mm. longis aristis marginalibus 2—2.5 mm. longis
Published in Rhodora, in 1919, in volume 21, issue 245, pages 103-104
Date published:1919