C.  Reynaud, ?Etude cytotaxinomique de quelques Hypericum d'Iran.?, Biol. Ecol. Medit., vol. 7, pp. 49 - 55 (1980) - illus., chrom. nos., 1980.

K. C.  Sahni and Naithani, H. B., ?Hypericum griffithii Hook. f. et Thoms. ex Dyer: a very rare shrub from Arunachal Pradesh.?, Indian Forester, vol. 106, pp. 865 - 868 (1980) - illus., 1980.

C. R.  Jimenez, ?Flora ilustrada catarinense: 1 parte. Fasciculo as plantas. Hipericaceaes.?, Itajai, Herbario "Barbosa Rodrigues", 1980. 34p.- illus., maps, key., 1980.

L. Z.  Gu and Zhang, H. B., ?Study of the chemical constituents in Hypericum attenuatum Chois.?, Acta Bot. Sin., vol. 22, pp. 151 - 155 (1980), 1980.

M. O.  Karryev and Komissarenko, N. F., ?Fitokhimicheskoe issledovanie rastenii roda Hypericum L. flory Turkmenii.?, Izv. Akad. Nauk Turkm. SSR, Biol. Nauk, vol. 3, pp. 52 - 57 (1980)., 1980.

Y.  Kimura, ?The type specimen of Hypericum japonicum Thunberg.?, J. Jap. Bot., vol. 55, pp. 81 - 85 (1980)   illus., 1980.

C.  Reynaud, ?Contribution a l'etude cytotaxinomique du genre Hypericum L. en Grece.?, Bull. Soc. Bot. France, vol. 127, pp. 345 - 353 (1980)   chrom. nos., 1980.

H.  Pesmen, ?Six new species from Anatolia.?, Notes Roy. Bot. Gard. Edinburgh, vol. 38, pp. 435 - 441 (1980)   Illus., 1980.

N. K. B.  Robson and Davis, P. H., ?A new Turkish species of Hypericum sect. Arthrophyllum.?, Notes Roy. Bot. Gard. Edinburgh, vol. 38, pp. 103 - 104 (1980)   Key., 1980.

N. K. B.  Robson, ?A new species of Hypericum from Angola.?, Bol. Soc. Brot., ser. 2, vol. 53, pp. 113 - 121 (1979 - 80 publ. 1980) - illus., map, key., 1980.

N. K. B.  Robson, ?Hypericum olympicum: wild and cultivated.?, Plantsman, vol. 1, pp. 193 - 200 (1980) - col. illus., map, chrom. no., key., 1980.