488 Scientific Proceedings, Royal Dublin Society. 



PoLYGONACEjE. 



Oxyria digijna Hill. — Seeds (1909) planted on 6tli May, 1911. On 3rd June, 



1911, several had germinated, and had produced one or two leaves. 

 Cotyledons petiolate, blade rather fleshy, ovate-lanceolate, sharply 



marked off from the petiole, entire, obtuse, glabrous. Petiole 5| mm. 



long, blade 7 mm. by 3^ mm. 

 Polygonum amculnre Linn. — Seeds (1910) planted on 12th July, 1911. On 



28th October, 1911, none had germinated. 

 P. Convolmihis Linn Cotyledons shortly petiolate, oblong, glabrous, 



17-22 mm. by 3 mm. 

 P. Hydropiper Linn. — Seeds (age uncertain) planted on 14th July, 1911. On 



28th October, 1911, none had germinated, 

 P. lapathifolium Linn. — Seeds (1910) planted on 19th April, 1911. On 7th 



May, 1911, one had germinated. On 28th October, 1911, no more had 



germinated. 



Cotyledons lanceolate, tapering at the base, obtuse, entire, with short 



scattered bristles, 12 mm. by 3 mm. First leaf narrowly lanceolate, 



acute, tapering at the base into the sliort petiole, with the stipules 



forming an ochrea. 

 P. Persicaria Linn.— Seeds (1910) planted on 12th July, 1911. On 28th 



July, 1911, several had germinated. On 16th September, 1911, two 



more had germinated. 



Cotyledons shortly petiolate, obovate — oblong, obtuse, entire, glabrous, 



6-7 mm. by 2-i~3 mm. 

 Bumex Acetosella Linn.— Seeds (1910) planted on 12th"JuIy, 1911. On 28th 



July, 1911, several had germinated. On 16th September, 1911, some 



more had germinated. Seedlings found at Carriokmines on 15th April, 



1910. 



Cotyledons narrowly spatulate or lanceolate, tapering at the base, 



obtuse, entire, glabrous, 6-10 mm. by l-5~2-|- mm. First leaf spatulate. 

 R. crispus Linn.— Seeds (1910) planted on 12th July, 1911. On 28th July, 



1911, several had germinated, and on 16th September, 1911, many had 



germinated. 



Cotyledons petiolate, blade elliptical, entire, obtuse, glabrous. Petiole 



2-3 mm. long, blade 9 mm. by 2^-3 mm. 

 B. maritimus Linn.- Seeds (1910) planted on 19th April, 1911. On 28th 



October, 1911, none liad germinated. 



