1921] GARDNER—GERMINATION 277 
TABLE XVII 
SEEDS Coats ENDOSPERM EMBRYO 
Verbascum Thapsus 
BOE eee aie Acid Cell walls acid; con- | Cell walls acid; con- 
tents neutra tents neutral 
Soaked in dark- 
ee eae ee Acid Cell walls acid; con- | Outer cell walls and con- 
tents neutral tents alkaline to neu- 
tral; inner cell walls 
acid; contents alka- 
e 
Soaked in light. .| Acid bad seo! acid; contents | Walls and contents acid 
aci 
Rumex crispus 
fay Celene Acid Outer layer sae: cell | Walls and contents neu- 
contents n ral tral 
nna in dark- 
OS ree Acid Outer layer acid; con- | Walls acid; contents 
tents mostly acid neutral 
Soaked in light. .| Acid bij acid; contents | Walls and contents acid 
aci 
Daucus Carota 
te pp ene eee Outer _ Cell walls acid to alka- | Alkaline 
acid; line; contents neu- 
alkalin ok: tral to alkaline 
ir in dark- 
eer Outer acid; | Walls acid to alkaline; | Alkaline except at tip of 
inner alka- hypocotyl 
idee, hee oe 
Soaked in light. . 
line 
Ou ter acid; 
inner alkaline 
contents neutral to 
lkaline 
Walls acid to alkaline; 
contents neutral 
Walls and contents acid 
Nicotiana Tabacum 
Acid 
Acid 
Acid 
Cell walls acid; con- 
tents neutral to alka- 
Walls acid; contents 
alkaline to neutral 
Walls acid; contents 
neutral to acid 
Cell walls acid; con- 
tents neutral to a. 
line 
Cell walls acid; con- 
tents partly a alkaline, 
partly neutral 
Walls acid; contents 
acid except at base of 
