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136 REPORT OF THE LONDON BOTANICAL EXCHANGE CLUB.
ing tour. Our stay in most places, as I have stated in the beginning of this
Tery meagre account of my rambles during the ' Challenger's ' four months'
cruise, seldom exceeded tliree days, but for which limitation I should most
certainly have made a larger collection of living botanical treasures. Never-
theless, as it was, I have been successful enough to bring with me in good condition,
I have no hesitation in saying, the largest collection of choice and
beautiful plants ever yet collected in the islands of the South Pacific.
EEPOllT or THE LONDON BOTANICAL EXCHANGE
CLUB.
By J. Boswf.ll-Syme, F.L.S., Curator.
In the following Eeport, I have confined myself to remarks on the
plants sent for distribution by the members of the Botanical Exchange
Club, or those which have come under my own observation.
ThaUctrum saxatile, Schleich. Little Trees Hill, Grogmagogs, Cam-
bridge ; ]\Ir. r. A. Hanbury. Li the third edition of ' English
Botany ' I expressed a suspicion that the flowers of this plant were not
erect, and that it might be the T. collmmn of Wallroth. I am now able
to say that this is the case; the flowers are drooping. In 1863 I
brought a root, gathered before it flowered under the guidance of Pro-
fessor Babington, in the station mentioned above. This root I culti-
vated until 1 came to Scotland last year, so that I was able to observe
its flowers for several seasons. The pedicels are thicker and less
flexible than in T. minus and T. Kochii, but the flowers always droop
when ex])anded. The Cambridge plant cultivated beside T. Kochii,
Fries (received from Mr. H. C. Watson, who brought it from the
Lake district), produced far fewer and much shorter stolons than the
latter, which increased rapidly, new plants appearing on its subterra-
nean stolons one or even two feet from the parent. The fruit of these
two plants is very similar, and strikingly different from that of T.
minun.
Rnwincnlus aquatiUs, Linn. Several of the forms, including var.
Psendo-JJidtans, near Warwick ; Mr. H. Brorawich. In the third
edition of ' English Botany ' I arranged four subspecies under R.
aquatiiis. I now believe these ought to be reduced to two ; the first,
R. peltalus, with its varieties vulgaris, floribundus, and Psendo-flui-
tans ; the second, to which I propose to give the name R. steuopeta-
lus, under which R. Jieterophyllus, Bab. ; R. Drouettii, Schultz ; and