Many species of the Gentianales (as defined in this paper) have been used as antimalarial treatments; it is thus interesting to note that the suspected sister group is known to have antimalarial alkaloids as well, in particular, species of Dichroa and Hydrangea, both in the Hydrangeaceae (Watt & Breyer-Brandwijk, 1962).
Data associated with the Columelliaceae (whose exact systematic position has been problematic) may suggest that it is the remains of part of that archaic web of taxa that once linked the early Gentianales (and possibly Scrophulariales) to its Cornalian-like ancestor.
It is interesting that within the Loganiaceae, the tribe Gelsemieae exhibits the greatest number of shared characters with the other members of the Gentianales.
The Buddlejaceae and Retziaceae also form bridging taxa between the Scrophulariales and Gentianales, in particular with the family Loganiaceae (and possibly also the Solanales).
Systematic importance of orbicule diversity in Gentianales
Floristics, cladistics, and classification: Three case studies in the Gentianales
, there are a few multistaminate genera in Rubiaceae.
Les families hyperaccumulatrices d'aluminium sont surtout presentes dans les branches basales de groupes generalement evolues comme les rosides (Myrtales, Malpighiales, Oxalidales) et les asterides (Cornales, Ericales, Gentianales, Aquifoliales), mais le caractere a probablement disparu dans les groupes les plus derives.
Rubiaceae take the most basal position within the Gentianales (e.
Except for Gentianales, aluminum hyperaccumulation is rarely present in euasterids I.
In the Laboratory of Plant Systematics (Katholieke Universiteit Leuven), studies currently under way on aluminum hyperaccumulation focus on the asterids (Cornales, Ericales, Gentianales, Aquifoliales) and rosids (especially Myrtales).
1994; Takhtajan, 1997); as an order separate from the Gentianales (Tsiang, 1934; Hutchinson, 1973); and as a suborder within the Gentianales (Rosatti, 1989; Nicholas & Baijnath, 1994; Omlor, 1998).
None of these possibilities seems to have met with much acceptance, so that, more than 180 years after Brown's (1810b) treatise, the group is still usually maintained as two families in the Gentianales.
A consensus classification for the order Gentianales with additional details on the suborder Apocynineae.
Cladistics and family level classification of Gentianales.