Notes

A very polymorphic taxon where varieties based on the presence or absence of indumentum (on the stem, inflorescence, calyx and corolla) and on the colour of the corolla have been recognised. We consider the latter character of small importance, a similar variation in corolla colour existing in some other species, e.g. K. lateritia and K. lanceolate.. Moreover, the colour of the corolla seems to change to some degree with age as was noted by various collectors. In the F.Z. area, plants with yellow (pale or deep), salmon, orange and brick corollas are found in the same places, e.g. in Vumba Mts. (Zimbabwe) and in Solwezi Distr. (Zambia). The density of the indumentum is also quite variable, some plants being somewhat pubescent-glandular, as the specimen Bally in Champion 460B (K) from Mwenzo (Zambia), whereas others are completely glabrous or have sparse hairs (all plants from Zimbabwe). However, hairiness, at least on the inflorescence, is a constant character in some regions, e.g. Zaire and Angola. Most Zimbabwean specimens differ in several features from material of Cameroon, Zaire, Angola and E. Africa: the pedicels are somewhat broadened above and usually grooved (when dry); the calyx is slightly longer ((4)5-10 mm. long compared with 3-8 mm. in plants from other countries) and differs in shape, being truncate and finally circumscissile at the base rather than rounded and persistent; and the styles measure (1·5)2(2·5) mm. compared with 0·75-1·6 mm. Specimens from Tanzania were seen in which the calyx was truncate and circumscissile (1 specimen) and had longer styles (several specimens). Possibly the Zimbabwean plants could be treated as a separate variety or subspecies, which should include also some Tanzanian material. The main features of subsp. crenata, common to plants throughout the distribution-range, are both the sepal shape (linear-lanceolate, attenuate) and anther position (all included, the upper (1)1·5-2(2·5) mm. below the mouth of the corolla tube). In specimens from the F.Z. area the filaments of the lower stamens are 0·75-1·75 mm. long, rarely almost absent, and those of the upper ones usually 1·5 mm. long. The collection Chapman 1671 has the apex of the anthers just appearing at the mouth of the corolla tube, and thus makes a transition to subsp. nyassensis. The differences between subsp. crenata and K. lateritia are discussed under the latter (No. 4). Some Zambian specimens from the Mbala (Abercorn) area, i.e. Bullock 3976 (BR; K), Gamwell 62 (BM), Richards 15289 (EA; K) have sparsely hairy leaves and a generally longer indumentum, and seem intermediate between subsp. crenata and K. lateritia. They may possibly represent hybrids between these taxa.