ON POTAMOGETON LANCEOLATUS OF SMITH. 9 
this fiction; and the history of sec nape aiongy which can — 
determine the point, appears to me to prove (I own from 
very imperfect sbearrations) that here a one- salted raceme or vuike 
is present, whose unrolling is only a peculiar situation of the buds.” 
rom a study of their ul cariony Mr. Henslow has come to the 
bearer dpe is state the paper mentioned above, that 
som 
cmp ogias rf monopodia. “Intretng and ingenious though this 
od o estigation may be, it is too theoretical to afford per- 
fectly Someta ae peg and, moreover, it cannot be hg ee i in Tall 
cases. e only way to decide question Pap this kind is, as 
Schleiden urged, to. oan er actuall yen es when the 
inflorescence is being formed, to study carefully its oo. 
This has been done Or several botanists with the followin ults :— 
Kaufmann concludes that the inflorescence of Symphi hich pere- 
grinum, of Myosotis palustris, of te officinalis, and others, is 
produced by its dichotomy of an axillary bud, and this con- 
clusion was con y Warming, by Pedersen, and by Kraus, 
in so far as sp ae scorpioid cymes are concerned ; but naked 
cymes, such as those of Myosotis re of Heliotropium, are, according 
to Kraus, monopodia with a flattened growing-point which bears 
two rows of flower-rudiments a yt dorsal surface. The more 
recent researches of Goebel (Arb. d . Bot. Inst. in Wiirzburg, Bd. ii., 
1880), show not only that Kraus’ . f the development of the 
inflorescence of Myosotis and Heliotropium is accurate, but that it 
applies also to that of Symphytum officinale, Anchusa, oo 
Borago, Cynoglossum, Echium vulgare Lithospermum arvense 
Caryolopha sempervirens. Goebel finds also that the development 
f the i 
scen 
podia, and this being so, ag must be termed not scorpioid cymes, 
but unilateral racemes. Mr. Henslow, in fact, suggests in his paper 
at i 
‘* Naturphilosophie ” which long impeded the progress of 
research, and which were first eodeel by the efforts of Schleiden. 
* 
ON POTAMOGETON LANCEOLATUS OF SMITH. 
By C. C. Basinaton, F.R.S., &c. 
Tuts ps which was until the present year only known to 
C 
