Photosynthesis (Net CO2 Exchange Rate) References
Heterotheca subaxillaris (Lam.) Britt. & Rusby [Camphorweed]
Johnson, S.L. and Lincoln, D.E. 2000. Allocation responses to CO2 enrichment and defoliation by a native annual plant Heterotheca subaxillaris. Global Change Biology 6: 767-778.