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Extension of the geographical range and notes on the diagnostic characters of canthium suberosum new record rubiaceae vanguerieae


, : Extension of the geographical range and notes on the diagnostic characters of canthium suberosum new record rubiaceae vanguerieae. South African Journal of Botany 53(2): 180-183

The known range of Canthium suberosum Codd, a species previously thought to have a rather limited distribution in the Transvaal and Swaziland, has been considerably extended. A comparative study of the anatomy of the leaves and young stems as well as the pollen morphology and fruit and seed structure prove that a putative new species [C. interme] from Natal and Pondoland is conspecific with C. suberosum.

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Related references

Tilney, P.; Kok, P.; Wyk, A.-Van, 1987: Extension of the geographical range and notes on the diagnostic characters of Canthium suberosum (Rubiaceae--Vanguerieae). South African journal of botany: official journal of the South African Association of Botanists = Suid Afrikaanse tydskrif vir plantkunde: amptelike tydskrif van die Suid Afrikaanse Genootskap van Plantkundiges 53(2): 180-183

Bridson, D.M., 1992: The genus Canthium (Rubiaceae - Vanguerieae) in tropical Africa. Four subgenera are recognized for tropical Africa (Canthium, Bullockia, Afrocanthium, Lycioserissa). A key is provided for these, together with four genera previously segregated from Canthium. Keys are given for species in subgenera Afrocanthium a...

Tilney, P., M.; Van-Wyk, A., E., 1997: Pollen morphology of Canthium, Keetia and Psydrax (Rubiaceae: Vanguerieae) in southern Africa. Pollen of all the southern African members of Canthium, Keetia and Psydrax was studied by means of LM, SEM and TEM. Palynologically these three genera can easily be distinguished from one another, exine structure and sculpturing being the most use...

Bridson D.M., 1987: Studies in african rubiaceae vanguerieae a new circumscription of pyrostria and bullockia new subgenus of canthium. Preliminary notes on Pyrostria sensu lato and allies are given; the circumscription of Pyrostria is enlarged to include 11 African species; 6 new combinations are made, 1 new species described and 4 poorly known species noted. Canthium subgen. Bul...

Bridson, Dm, 1987: Studies in African Rubiaceae, Vanguerieae: a new circumscription of Pyrostria and a new subgenus, Canthium subgen. Bullockia. Kew bulletin2(3): 611-639

Cavaco A., 1967: Notes on some vanguerieae d rubiaceae d. Adansonia 7(3): 357-361

Verdcourt, B., 1987: Notes on African Rubiaceae-Vanguerieae. Kew bulletin2(1): 123-199

Verdcourt B., 1987: Notes of african rubiaceae vanguerieae. This precursor paper in connection with the account of the Rubiaceae for Flora of Tropical East Africa (Part 2) deals with the remainder of the Vanguerieae with the exception of Canthium and genera formerly confused with it which forms the subject...

Tilney, P.M.; Wyk, A.E. van; Kok, P.D.F., 1988: The taxonomic significance of anatomical characters of the stem in the southern African species of Canthium s.l. (Rubiaceae). Fourteen species of Canthium s.l. recorded in southern Africa were studied. The anatomy of the young stem is described and the taxonomic and diagnostic value of the characters discussed. Several anatomical features of the stem are useful in distin...

Tilney, P.M.; Kok, P.D.F.; Wyk, A.E. van, 1990: The taxonomic significance of anatomical characters of the leaf in the southern African species of Canthium s.l. (Rubiaceae). A study was made of 14 species of Canthium s.l. recorded in southern Africa, including taxa of doubtful identity. The anatomy of the leaf is described and the taxonomic and diagnostic value of the characters discussed. As with the stem, several an...