Náttúrufræðingurinn - 1993, Blaðsíða 77
erfðaefni og myndunar nýrra arfgerða.
Mun færri plöntustofnar virðast hins
vegar viðhaldast án þeirra dreifingar-
möguleika sem fást með fræjum.
ÞAKKIR
Dr. Borgþór Magnússon og dr. Helgi
Björnsson lásu greinina yfir og komu með
margar gagnlegar ábendingar og tillögur.
Kann ég þeim bestu þakkir fyrir.
HEIMILDIR
Coe, M.J., D.L. Dilcher, J.O. Farlow,
D.M. Jarzen & D.A. Russell 1989. Di-
nosaurs and land plants. í The Origins
of Angiosperms and their Biological
Consequences (ritstj. E.M. Friis, W.G.
Chaloner & P.R. Crane). Cambridge
University Press. Bls. 225-258.
Crepet, W.L. 1983. The role of Insect Pol-
lination in the Evolution of the Angio-
sperms. í Pollination Biology (ritstj. L.
Real). Academic Press. Bls. 31-50.
Crepet, W.L. & E.M. Friis 1989. The ev-
olution of insect pollination in angio-
sperms. 1 The Origins of Angiosperms
and their Biological Consequences (rit-
stj. E.M. Friis, W.G. Chaloner & P.R.
Crane). Cambridge University Press.
Bls. 181-202.
Cronquist, A. 1988. The Evolution and
Classification of Flowering Plants. 2.
útg. The New York BotanicaI Garden,
New York. 555 bls.
Friis, E.M. & W.L. Crepet 1989. Time of
appearance of floral features. í The Or-
igins of Angiosperms and their Biologi-
cal Consequences (ritstj. E.M. Friis,
W.G. Chaloner & P.R. Crane). Cam-
bridge University Press. Bls. 145-179.
Gifford, E.M. & Á.S. Foster 1989. Mor-
phology and Evolution of Vascular
Plants. W.H. Freeman Co. 696 bls.
Harper, J.L. 1977. Population Biology of
Plants. Academic Press. 892 bls.
Hickey, M. & King, C. 1988. 100 Families
of Flowering Plants. 2. útg. Cambridge
University Press, Cambridge.
Janzen, D. 1986. Seeds as products. Oikos
46. 1-2.
Keng, H. 1983. Orders and Families of
Malayan Seed Plants. Singapore Univer-
sity Press, Singapore.
Probert, R. 1992. Seeds of success. Nature
359. 450.
Raven, P.H., R.F. Evert & S.E. Eichhorn
1992. Biology of Plants, 5. útg. Wortli
Publishers, Inc. 791 bls.
Takhtajan, A. 1991. Evolutionary Trcnds
in Flowering Plants. Cohtmbia Universi-
ty Press, New York. 241 bls.
Taylor, D.W. 1982. Reproductive biology
of early seed plants. BioScience 32. 23-
28.
Tiffney, B.H. 1986. Evolution of seed dis-
persal syndromes according to the fossil
records. Seed Dispersal (ritstj. D.R.
Murray). Academic Press.
Wareing, P.F. & I.D.J. Phillips 1970. The
Control of Growth and Differentiation
in Plants. Pergamon Press. 303 bls.
Wing, S.L. & B.H. Tiffney 1989. Angio-
sperms and herbivorous tetrapods. í The
Origins of Angiosperms and their Bio-
logical Consequences (ritstj. E.M. Friis,
W.G. Chaloner & P.R. Crane). Cam-
bridge University Press. BIs. 203-224
Þóra Ellen Þórhallsdóttir 1993. Vistfræði
fræja. Náttúrufrœöingurinn 63. árg. (í
prentun).
PÓSTFANG HÖFUNDAR
Þóra Ellen Þórhallsdóttir
Líffrceðistofnun Háskólans
Grensásvegi 12
108 Reykjavík
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