8 NOTES ON POND WE EDS. 



roads ; in a stream between Ballinakill Church and Blenheim Hill ; 

 at the foot of a Hill near Creaden Head. 



XPastinaca sativa L. By a wall facing the sea at Passage. 



Dipsacus sylvestris L. Frequent throughout the county. 

 *Crejns taraxacifoUa Thuill. D 2. Four or five plants of this 

 species were growing by the side of the Avenue at Blenheim. 



Lithospermum officinale L. Fields about Blenheim. 



Calamhitha officinalis Moench. Boad-sides near Passage and 

 Ballinamona. 



Hordeum pratense Huds. The marsh under Blenheim Hill. 



[Note. — Verhascum Blattaria L. and Bronnis madritensis L. were 

 gathered on a strip of waste ground at the Waterford Traraore 

 Bailway-station, where, no doubt, they were recently introduced.] 



NOTES ON PONDWEEDS. 

 By Alfred Fryer. 



Potamogeton coriaceus mihi. (P. luceus var. coriaceus Nolte). 

 — Stems sprmging from a tuberous rootstock, 1-4 ft, long, stout, 

 round, much branched from the base, or simple below in strong 

 shoots produced late in the season. Lower branches permanently 

 submerged ; upper branches ultimately ascending to the surface 

 and spreading into numerous branchlets, each of which is terminated 

 by coriaceous fioatiny leaves, which, from the shortness of the uj)per 

 internodes of the stem, often grow in the form of a rosette. Leaves 

 at the base of the stem often reduced to phyllodes, succeeded by 

 one or two which have a thickened midrib slightly winged, and are 

 bodkin-pointed ; ordinary submerged leaves stalked or sessile, mem- 

 branous, with numerous longitudinal ribs connected by transverse 

 veins, which are often very conspicuous ; entire, without spinous 

 denticidations, usually fiat or very slightly undulated, sometimes 

 longitudinally folded and recurved, oblong or obovate, abruptly 

 narrowed into a blunt, somewhat concave mucro, often gradually 

 narrowed to the base so as to become clavate in outline, more 

 rarely lanceolate, or elliptical and acuminate. Upper leaves coriaceous, 

 all stalked; lamina 1^-3 in. long by 1-1-^ in. broad, always greatly 

 exceeding the petiole, w^th the slender midrib bordered on each side 

 by elongate chain-like areolations, forming a narrow band of 

 thinner texture than the opaque body of the leaf, with 8-10 trails- 

 lucent lateral ribs on each side, 2-3 of which are more conspicuous 

 than the rest or translucent and of the same texture as the 

 submerged leaves ; obovate, or roundish, or clavate, rarely elliptical, 

 somewhat abruptly narrowed into the short convex tip. Stipules 

 herbaceous, large, blunt, slightly winged on the back, with numerous 

 anastomosing longitudinal veins. Flower-spikes usually terminal, 

 stout, cylindrical, dense, 1^ in. long. Peduncle very stout, swollen 

 upwards, slightly curved at the time of flowering, but usually 

 straight and erect in fruit. Drupelets rather small in proportion to 



