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P.  Adams, ?Studies in the Guttiferae. 3. An evaluation of some putative spontaneous garden hybrids in Hypericum sect. Myriandra.?, Rhodora, vol. 74, pp. 276-282 (1972), 1972.

G. F.  Akhundov and Babaev, N. B., ?Perspektivy ispol'zovaniya endemichnykh rastenii Azerbaidzhana v tsvetovodstve.?, in Azerbaidjan: Akad. Nauk Azerbaidzhanskoi SSR: Inst. Bot. Materialy po flore i sistematike vysshikh rastenii Azerbaidzhana:, 1972, pp. 64-67 (1972).

J.  Delay, ?Prospection caryologique en Brenne et Limousin. (A caryological prospection in Brenne and Limousin).?, Bull. Soc. Bot. France, vol. 116, pp. 69-74 (1969 publ. 1972), 1972.

R. M.  Downs, ?Hypericum mitchellianum in West Virginia.?, Castanea, vol. 37, p. 149 (1972), 1972.

A. J.  Healy, ?Weedy St. John's worts (Hypericum spp.) in New Zealand.?, in Proceedings of the 25th New Zealand Weed and Pest Control Conference:, 1972, pp. 180-190 (1972).

N. K. B.  Robson, ?Hypericum x destangsii.?, Watsonia, vol. 9, p. 203 (1972), 1972.

N. K. B.  Robson, ?Identification lists of Malaysian specimens: 46. Hypericum.?, Leyden, Foundation Flora Malesiana, 1972., pp. pp. 801-811, 1972.