NOMENCLATURAL NOTES ON CALLISTEMON R. Br. (MYRTACEAE) by P. F. Lumley and R. D. Spencer* ABSTRACT Lumley, P. F. & Spencer, R. D. Nomenclatural notes on Callistemon R. Br. (Myrtaceae). Muelleria 6(6): 411-415 (1988). — The name Callistemon rugulosus (D. F. K. Schldl. ex Link) DC. is adopted for the species which has been known incorrectly as Callistemon macropunctatus (Dum.-Cours.) A. B. Court, a name whose basionym Metrosideros macropunctata Dum.-Cours. is of uncertain application. The name Callistemon glaucus (Bonpl.) Sweet is taken up for the species to which the name Callistemon speciosus (Sims) Sweet has been misapplied. Plants previously referred to Callistemon paludosus F. Muell.arenowreferredtoCallistemonsieberiDC.withwhichCallistemonsalignus(Sm.)Sweetvar. australisBenth. sensustrictoissynonymous. ThenameCallistemonpityoidesF. Muell. istakenupto replace the previously misapplied name C. sieberi DC.. INTRODUCTION This paper is presented ahead of a revision of the genus Callistemon in order to justify names used by Spencer and Lumley (1986) in edition 4, part 2 of ‘Flora of South Australia’. NOMENCLATURE Callistemon rugulosus (D. F. K. Schldl. ex Fink) DC., Prodr. 3: 223 (1828)., as ‘C. rugulosum’. — Metrosideros rugulosus D. F. K. Schldl., Enum. pi. hort. berol. supp. 31 (July-Dee. 1814), as ‘M. rugulosa’, nomen nudum. — M. rugulosus D. F. K. Schldl. ex Link, Enum. hort. berol. alt. 2: 27 (1822), as ‘M. rugulosum’. Neotype (here selected): “Jard. de Berlin” 1826, Otto s.n. (G-DC!). Metrosideros scabra Colla, Hortus ripul. 91 (1824). Lectotype (here selected): ‘‘ex horto 1831” (TO 22881). [Callistemon macropunctatus auett. non (Dum. Cours.) A. B. Court, Victorian Naturalist 73: 175 (1957).] The combination Callistemon rugulosus (Willd.) DC appears to be illegitimate being based on the invalid publication of Metrosideros rugulosa in D. F. K. SchlechtendaPs supplement (July-Dee. 1814) to Willdenow’s Enumeratio plantarum horti regii botanici berolinensis. Realising this, A. B. Court ( loc . cit.) published the combination Callistemon macropunctatus (Dum.-Cours.) A. B. Court based on the next available name for this taxon, Metrosideros macropunctata Dum.-Cours., Bot. cult, edn 2, 7: 277 (June 1814), a synonym cited by de Candolle (1828) which has priority over M. rugulosa Schldl. Du Mont de Courset’s description was of young, non-flowering, cultivated material; the leaf dimensions, 7 lignes [14mm] by 1 ligne [2mm], fall well outside the normal range for Callistemon macropunctatus as now understood. We can find no illustration of Metrosideros macropunctata nor any herbarium specimen so labelled in any of the collections we have examined. The description cannot be satisfactorily applied to any species of Callistemon-, consequently we regard this name as of uncertain application. The next available names for this species are Metrosideros rugulosa D. F. K. Schldl. ex Link (1822) and Metrosideros scabra Colla (1824). Since de Candolle did not explicitly cite Metrosideros rugulosa D. F. K. Schldl. ex Link (or Willd. ex Link) 1822 as the basionym for his combination Callistemon rugulosus and since C. rugulosus (D. F. K. Schldl.) DC. (1828) would be illegitimate as it would be based on the invalid M. rugulosa D. F. K. Schldl. (1814), there is *RoyalBotanicGardens,BirdwoodAvenue,SouthYarra,Victoria,Australia3141. 411