Plant Dry Weight (Biomass) Responses to Atmospheric CO2 Enrichment

H

   300 ppm   600 ppm   900 ppm 
Plant Name  Number of
Studies 
 Arithmetic
Mean 
 Standard
Error 
 Number of
Studies 
 Arithmetic
Mean 
 Standard
Error 
 Number of
Studies 
 Arithmetic
Mean 
 Standard
Error 
Hairgrass, Wavy [Deschampsia flexuosa] 119%0%        
Hairy Bracken [Pteridium revolutum] 349%7.4%        
Hayfield Tarweed [Hemizonia congesta] 248.5%10.3%        
Heath, Crossleaf [Erica tetralix] 423.8%10.5%        
Heather [Calluna vulgaris] 917.1%5.4%        
Hedera helix [English Ivy] 366%10.6% 429.8%2.4% 225%7.8%
Helianthemum nummularium [Sun Rose] 10%0%        
Helianthus annus [Sunflower] 1948.1%7% 431.8%14.6% 570.2%27.4%
Hellroot [Orobanche minor] 10%0%        
Helxine soleirolii     231.5%3.2%    
Hemigraphis alternata [Red Ivy]         1-9%0%
Hemizonia congesta [Hayfield Tarweed] 248.5%10.3%        
Hemlock, Eastern [Tsuga canadensis] 334%4.5%        
Hemlock, Poison [Conium maculatum] 121%0%        
Herb, Perennial [Wedelia chinensis] 247.5%0.4%        
Heterosigma akashiwo [A Marine Raphidophyte] 215%2.1%        
Heterotheca subaxillaris [Camphorweed] 120%0%        
Hilograss [Paspalum conjugatum] 118%0%        
Hippeastrum [Amaryllis]     215%1.4%    
Hippophae gyantsensis [Chinese Seabuckthorn] 155%0%        
Hippophae rhamnoides [Common Seabuckthorn] 123%0%        
Hizikia fusiforme [Hiziki (Brown Seaweed)] 145%0%        
Hiziki (Brown Seaweed) [Hizikia fusiforme] 145%0%        
Holcus lanatus [Common Velvetgrass] 1138.5%10.4%        
Hordeum vulagare [Barley] 7441.1%4.9% 450.8%16.4% 127%0%
Hydrilla verticillata [Water Thyme] 721.9%3.3%        
Hylocereus undatus [Red Pitaya]     313%2.9%    
Hymenocallis littoralis [Spider Lily] 252%2.8%        
Hyparrhenia rufa [Jaragua] 233.5%1.8%        
Hypericum perforatum [St. John's Wort] 172%0% 1107%0% 332%0%
Hypnea spinella [Red Seaweed] 166%0%     146%0%
Hyptis suaveolens [Wild Spikenard] 11720%0%        

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