M. 9 10
TIME OF CLOSING.
h. m.
HELMINTHIA ECHIOIDES B.H. 12 0
AGATHYRSUS ALPINUS A.B. 12 0
BORKHAUSIA ALPINA A.B. 12 0
LEONTODON SEROTINUS L.D. 12 0
MALVA CAROLINIANA C.M. 12 1
DAINTHUS PROLIFER P.P. 1 0
HIERACIUM PILOSELLA M.H. 0 2
ANAGALLIS ARVENSIS S.P. 2 3
ARENARIA PURPUREA P.S. 2 4
CALENDULA ARVENSIS F.M. 3 0
TACETES ERECTA A.M. 3 3
CONVOLVULUS ARVENSIS S.B. 4 0
ACHYROPHORUS MACULATUS S.A. 4 5
NYMPHAEA ALBA W.W.B. 5 0
PAPAVER NUDICAULE N.P. 7 0
HEMEROCALLIS FULVA C.D.L. 7 0
CICHORIUM INTYBUS W.S. 8 9
TRAGOPOGON PRATENSIS Y.G.B. 9 10
STELLARIA MEDIA C. 9 10
LAPSANA COMMUNIS C.N. 10 0
LACTUCA SATIVA G.L. 10 0
SONCHUS LAEVIS S.T. 11 10
PORTULACA OLERACEA S.P. 11 12
Of course it will be necessary to adjust the _Horologium Florae_ (or
Flower clock) to the nature of the climate. Flowers expand at a later
hour in a cold climate than in a warm one. "A flower," says Loudon,
"that opens at six o'clock in the morning at Senegal, will not open in
France or England till eight or nine, nor in Sweden till ten. A flower
that opens at ten o'clock at Senegal will not open in France or England
till noon or later, and in Sweden it will not open at all.
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