320 xaiadaceyE. 



666. P. pectinatus, Z., var. b. scoparius. Fennel -leaved Pondweed. 



Native ; in the brackish water of a marsh drain. Very rare. 

 D. IV. Drain, Chelson .Aleadow ; Mr. W. B. Waterfall, 1877. Specimen 

 seen, 



ZANNICHELLIA, L. 



667. Z. pedicillata, Fries. Stalk-fruited Horned Poiidweed. 



May to July, or later. 



c. I. In a pool by the Seaton estuary, close to the coast. 



D. IV. Saltram ; Keys, Fl. ui. '2o0. This is given under "Z.j9«^?^,<t^;'/5" 

 in the Flora of Devon and Corn wall, but I have ventured to 

 insert the station under x>ediciUata, as from the situation the 

 plant found at Saltram was most likely this latter, regarded by 

 many as a sub-species, or even variety only, of the former. 



RUPPIA, L. 



668. R. rostellata, Hartm. Lesser Ruppia, 



Native ; in a marsh drain, and in pools of brackish water. Very 

 rare. June to September. 

 D. IV. Saltram ]Mai-shes, in Chelson MeadoAv ; Keys, Fl. iii. 250. Speci- 

 men in Herh. Gould., July, 1850. 

 VI. In little pools close to where a small stream from Holbeton 

 village runs into the Ernie estuary ; flowering and fruiting, 

 June, 1878. 

 The Chelson ]\Ieadow plant was found to be the segregate rostellata, 

 and not sjjiralis, through fruiting specimens forwarded to me by 3Ir. W. 

 B. Waterfall, in August, 1876. In Keys's Flora it is given under the 

 old aggregate name of maritima. 



ZOSTERA, L. 



669. Z. marina, L. Common Grassicrack. 



Native ; in the sea, and, as var. amjustifolia, on the mud of 

 tidal waters. Very common, probably. 

 From the situations in which this grows it is impossible to ascertain its 

 distribution very exactly. Mostly seen cast up by the tide. 



670. Z. nana, Both. Dwarf Grasswrack. 



Native ; on the mud of tidal inlets or rivei*s. Rather common ] 

 July, or later, 

 c. II. On the mud of the tidal uilet from the Tamar estuary, below St. 



Johns. 

 D. III. On mud by the tidal Tavy, at Beer Ferrers. 



VI. On the mud of a tidal inlet from the Erme, below Cling Mill, 

 near Kingston. 



