For Sagina
Atha, D., R.V. Alvarez, and K. Chaya. 2018. First report of Sagina apetala (Caryophyllaceae) for New York. Phytoneuron 2018-34: 1-2. Published 30 May 2018. ISSN 2153 733X Google Scholar
Bittrich, V. 1993. Caryophyllaceae. In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp. Google Scholar
Crow, G.E. 1978. A taxonomic revision of Sagina (Caryophyllaceae) in North America. Rhodora 80: 1-91. Google Scholar
Crow, G.E. 2005. Sagina. In Flora of North America Editorial Committee. 2005. Flora of North America north of Mexico. Volume 5, Magnoliophyta: Caryophyllidae, part 2. Oxford Univ. Press, New York, NY. 656 pp. Google Scholar