'n 
POTAMOGETOX XITENS IN THE BIVER TAY. 259 
lineaslougus." 
') 
deorsum incurvus, longitudine calycis; faux inngna, ventricosa, tubo 
duplo longior; limbus 5-partitu3; laciuise oblongse, obtusse, patulae, 
longitudine tubi, 3 siiperiores erectiusculae (intus nivese), 2 laterales 
divaricatae (colore supernura) ; infima lacinia dependens, cseteris paulo 
longior (intus rubicunda, macula baseos magna lutea)." Stamina 4, 
*' tubolongiora; antherae 2-lobse.'' Ovarium 5-loculare, ovulis solitariis. 
" Stylus filifonnis, subulatus, inclinatus, corollae paulo longior. Stigma 
pubulatum, acutum, reflexum. Drupa oblongo-obovataj subtus 2-nata, 
obtusissima (non penitus matura magnitudiue nucis Avellana3) nux 
ovalis^ 54oculavis, loculo centvali major, nuclei oblongi solitarii-' 
Arbor Novae Hollandise orientalis, foliis oi)positis ovato-oblougis inte- 
gerrimis costatis glabris, basi 2-glandulosis; floribus cymoso-panicu- 
latis axillaribus et tenniualibus, albidis. 
Species unica : 
1. E. simpUcifolia, Sol. mss. 1. c. — Fitex (?) macrophijlla^ A. Brown, 
Prodr. p. 512. — Cape Grafton (Banks and Solauder !). 
FOTAMOGETON NITENS IN THE RIYER TAY, 
Mr. Jolin Sim, of Perth, has found the longer form of the plant in 
the river Tay, at Perth. The lowness of the water has allowed him 
access to it for the first time; and as he could not determine the 
name of the plant, from want of access to books, he was so good as to 
send a large bundle of it to me in a fresh state. The spef*imens 
closely resemble the P. lanceolatns of Keichenbach's ' Icones,' vii. 
t. 31, which is certainly not the P, lanceolatns, Sm., and seems almost 
equally certainly a state of P. vitevs, ]. c, t. 34. Mr. Sim states that 
the plant grows in deep and very rapid water, in company with P. 
perjolialm and P. cnspus,—C C. Babington. 
ON PLANTS PRODUCING DOUBLE FLOWERS. 
Mr. Edward Otto, the Curator of the Hamburg Botanic Garden, 
has recently published in the ' Gartenzeitung/ so ably edited by him, 
a list of the plants producing double flowers wdiich have come to light 
since my second list (Journ. of Botany, Vol. I[. p. 318) of them was 
printed. Most of them have aheady been recorded in our Journal 
