Náttúrufræðingurinn

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Náttúrufræðingurinn - 1983, Page 41

Náttúrufræðingurinn - 1983, Page 41
 responses of climatic races of Achillea. — Publ. Carneg. Inst. Wash. No. 581. Cooper, J. P. 1951. Studies on growth and development in Lolium. II. Pattern of bud development on the shoot apex and its ecological significance. — J. Ecol. 39 : 228-270. Cooper, J. P. 1952. Studies on growth and development in Lolium. III. Influence of season and latitude on ear emerg- ence. - J. Ecol. 40 : 352-379. Cooper, J. P. 1964. Climatic variation in forage grasses. — J. appl. Ecol. 1 : 45 — 62. Eagles, C. F. 1967. Variation in soluble carbohydrate content of climatic races of Dactylis glomerata (cocksfoot) at different temperatures. - Ann. Bot., N. S. 31 : 645-651. Eagles, C. F. 1971. Effect of photoperiod on vegetative growth in two natural populations of Dactylis glomerata L. — Ann. Bot., N. S. 35 : 75—86. Gustafsson Á. 1946-1947. Apomixis in higher plants. — Lunds Universitets Ársskrift 42-43 : 1-370. Hábjörg, A. 1978. Climatic control of floral differentiation and development in selected latitudinal and altitudinal ecotypes of Poa pratensis L. — Meld. Norg. Landbr. Högsk. 57, No. 7. Hábjörg, A. 1979. Seed production studies in latitudinal and altitudinal distant types of Poa pratensis L. cultivated at nine localities in Norway. — Meld. Norg. Landbr. Högsk. 58, No. 28. Harmer, R. 1978. Some physiological and ecological aspects of reproduction in Festuca vivipara (L.) Sm. — Ph. D. ritgerð, Univ. of Manchester. Hiesey, W. M. & H. W. Milner. 1965. Physiology of ecological races and spe- cies. — Ann. Rev. Plant Phys. 16 : 203-216. Hólmgeir Björnsson & Guðni Þor- valdsson. 1983. Prófanir á stofnum af vallarfoxgrasi, vallarsveifgrasi og tún- vingli 1955-1975. - Fjölrit Rala nr. 103. Hultén, E. 1968. Flora of Alaska and Neighboring Territories. — Stanford Univ. Press. Klebesadel, L. J. 1971. Nyctoperiod modi- fication during late summer and autumn affects winter survival and heading of grasses. — Crop Sci. 11 : 507-511. Klebesadel, L. J., A. C. Wilton, R. L. Taylor & J. J. Koranda. 1964. Fall growth behaviour and winter survival of Festuca rubra and Poa pratensis in Alaska as influenced by latitude — of — adaption. — Crop Sci. 4 : 340-341. Latting, J. 1972. Differentiation in the grass inflorescence. — f: V. B. Young- ner and C. M. McKeil (ritstj.): 366— 399, The Biology and Utilization of Grasses. Acad. Press, England. Levitt, J. 1972. Responses of Plants to Environmental Stresses. - Acad. Press, England. Markús Einarsson. 1976. Veðurfar á íslandi. — Iðunn, Reykjavík. Mooney, A. H. & W. D. Billings. 1961. Comparative physiological ecology of arctic and alpine populations of Oxyria digyna. — Ecol. Monogr. 31 : 1—29. Nygren, A. 1949. Studies on vivipary in the genus Deschampsia. - Hereditas 35 : 27-32. Philipson, W. R. 1937. A revision of the British species of the genus Agrostis linu. — J. Linn. Soc. 51 : 73—151. Pohjakallio, O. A., A. Salonen & S. Antila. 1960. Effect of daylength on winter hardiness of clover. — Maata- lous ja koetoiminta 14 : 104—111. Ryle, G. J. A. 1965. Effects of daylength and temperature on ear size in S.24 perennial ryegrass. - Ann. appl. Biol. 55 : 107-114. Turesson, G. 1922. The genotypical response of plant species to the habitat. — Hereditas 3 : 211-350. Turesson, G. 1925. The plant species in relation to habitat and climate. - Here- ditas 6 : 147-236. Turesson, G. 1930. The selective effect of climate upon the plant species. - Here- ditas 14 : 99-152. Whigham, D. 1974. An ecological life his- tory study of Uvularia perfoliata L. — Amer. Midl. Nat. 91 : 343-359. 31
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