. Bulletin of the British Museum (Natural History) Botany. 82 N. K. B. ROBSON C "^ Black glands absent '" ~\ Only reddish glands present. Fig. 12 Variation in distribution of black or reddish glands in Hypericum. On the other hand, related species may differ widely in the occurrence of hypericin. In sect. 27. Adenosepalum black glands are numerous and widespread in the more primitive species; but in the apparently derived sect. 28. Elodes the glands are usually merely reddish and confined to the sepal margins. A similar diminution in hypericin content is shown in the eastern Himalaya
. Bulletin of the British Museum (Natural History) Botany. 82 N. K. B. ROBSON C "^ Black glands absent '" ~\ Only reddish glands present. Fig. 12 Variation in distribution of black or reddish glands in Hypericum. On the other hand, related species may differ widely in the occurrence of hypericin. In sect. 27. Adenosepalum black glands are numerous and widespread in the more primitive species; but in the apparently derived sect. 28. Elodes the glands are usually merely reddish and confined to the sepal margins. A similar diminution in hypericin content is shown in the eastern Himalayan members of sect. 9. Hypericum, which are derived from a group of Chinese species with dark glands. An even more vivid example is found in sect. 16. Crossophyllum, where, of the two species (both with gland-fringed leaves), H. adenotrichum has dark marginal and superficial glands, whereas in H. orientale all the glands are pale (not even reddish). In the Vismieae, only amber to dark glands are present, whereas the Cratoxyleae have only pale glands. Inflorescence (a) Form As in the Bonnetiaceae, the inflorescence in Hypericum is basically cymose; but it never has a truly axillary position, in the axils of foliage leaves with the terminal bud remaining Fig. 13 Trends in inflorescence-branching in Hypericum (numbers indicate sections): (a) H. bequaertii (1); (b) H. revolutum (1); (c) H. aegypticum (25); (d) H. heterophyllum (24); (e) H. quartinianum (1); (0 H. roeperanum (1); (g) H. cordifolium (3); (h) H. scabrum (17); (i) H. salsolifolium (17); (j) H. punctatum (9); (k) H. brasiliense (30); (1) H. laxiusculum (30); (m) H. myrianthum (30); (n) H. styphelioides (29); (o) H. chamaemvrtus (30); (p) H. diosmoides (30); (q) H. carinosum (29); (r) H. thuyoides (29); (s) H. natalense (26); (t) H. peplidifolium (26); (u) H. tortuosum (23). O Flower, • Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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