420 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
constant from seed in cultivation. See ‘ Hot. Soc. Edin.’ p. 503, 
1873- 
2508. PoTAMOGETOM PUSiLLUS, L., var. ACUTUs, Fisch. In 
‘Her. Bay. Hot. Ges.’ xi., 1907, p. 116. River Bann, Co. Antrim. 
Zannichellia gibberosa, Reichb. Fen ditches, Eye, 
Northants, Marcham, Berks. A more slender plant with narrower 
leaves and apparently of earlier growth than paliisiris, since it was 
decaying in early September and had quite disappeared in Novem- 
ber, when Z. paliistris was still green and flowering. It is de- 
scribed and figured in ‘Reichb. leones Bot’ viii. p. 24, t. dcclix.. 
No. 1,006, “ Foliis tenuissimis, nuculis stipitatis divergentibus 
utrinque cristatis repando dentatis.” See also ‘ Reichb. FI. Germ. 
Excurs.’ p. 7, 1833: “Folia fere capillaria et fructus majusculis 
macrostyli speciem imprimis distinguunt.” Fruits practically iden- 
tical were shewn at the Linnean Society by Mr. Clement Reid, 
from the Cromer Forest Bed at Pakefield, Suffolk, thus proving 
it is a native plant. It has been recorded from the Elbe near 
Hamburgli ; specimens exactly matching the Northants plant are 
in ‘ Herb. Brit. Mus.’ 
2650. Phalaris angusta, Nees. A South American 
species, found at Slough, Bucks, 
Oryzopsls trichotoma (Nees). A South American species, 
found on wool refuse at Meanwood, Leeds, by F. A. Lees. It is the 
Nassella trichotoma^ Hackel = trichotoma, Nees. 
2697. Deveuxia retrofacta (Wind.), vice D. retrofacta, 
Kunth. ‘Rep.’ 1909, p. 351. 
2689. Agrostis lachnantha, Nees. A South African wool- 
alien, found by Miss Ida Hayward by the Tweed. 
2690. Polypogon linearis, Trin. A Chillian species, found 
at Meanwood, Leeds, and by the Tweed by Miss I. Hayward. 
2692. P. elongatus, H. B. K. A South American wool- 
alien, Meanwood, Leeds. F. A. Lees. 
2706 (i. Air.a caryophyllea, L., var. aggregata, Tim. 
