Taxon

Moore G. Should taxon names be explicitly defined Bot Rev 2003 69 2-21. 

Interest in chemical variation in Phytolacca dodecandra L Hert. stems from its potentially important biologically active constituents, perhaps the most significant of which is the mollnscicidal componnd lemmatoxin. Attempts to measure variation within this taxon, which occnrs widely on the African continent, have involved a stndy of morphological featnres (Adams et al., 1989) and the comparative chemical work to be described here (Adams et al., 1990). This more recent study involved analysis of nonpolar constitnents from three populations from Ethiopia, and one... 

Fig. 2.4 Map of Western Australia showing location of Geraldton after which the Geraldton waxflower (Chamelaucium uncinatum) is named. Stippled area represents an approximation of the taxon s range...

Myrtaceae), known locally as kanuka. Fifty-one specimens from New Zealand along with six from Australia (and other species of Kunzea) were included in the study. Oils from Australian and New Zealand specimens were quite similar with a-pinene as the most prominent component in both, along with lower but similar levels of p-cymene and 1,8-cineole. Although two chemotypes can be defined within this taxon, they occur within populations and do not show the geographic patterning seen in manuka. 

There are two obvious differences in pigment occurrence in this taxon. The first is the absence of herbacetin derivatives in the yellow race, which suggests the apparent absence of an enzyme capable of placing oxygen at the C-8 position of the... 

Glehnia, a taxon restricted to eastern Asia and western North America, consists of either two species, the Asian G. littoralis Fr. Schmidt ex Miq. and the North American G. leiocarpa Mathias, or two subspecies of G. littoralis, subsp. littoralis and subsp. leiocarpa. The Asian taxon occurs on sandy beaches of China and Japan, with the North American taxon occupying the same type of habitat from northern California to the northeastern coast of the Queen Charlotte Islands, British Columbia, and west to Kodiak Island (Fig. 4.9). Both taxa are diploids with n=ll. 

The genus Fuchsia consists of perhaps 100 species, enjoys a wide distribntion, and offers a variety of systematic and evolutionary challenges. In addition to attracting purely botanical interest. Fuchsia is also of considerable horticnltnral value. Our interest in the genns concerns sect. Skinnera which consists of three New Zealand species, F. excorticata L. f., F. perscandens Cockayne Allan, and F. procumbens R. Cnnn., and the Tahitian endemic F. cyrtandroides Moore. A fourth taxon, F. x colensoi Hook. f. occurs wherever the ranges of F. excorticata and F. perscandens overlap. 

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