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Deppeopsis, un Género Nuevo (Hamelieae, Rubiaceae) de México y Guatemala

Borhidi, A. and Stranczinger, Sz. (2012) Deppeopsis, un Género Nuevo (Hamelieae, Rubiaceae) de México y Guatemala. Acta Botanica Hungarica, 54 (1-2). pp. 85-90. ISSN 0236-6495

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Abstract

Within the frame of the Deppea two types of floral organisation have been recognised: the classic genus based on the type D. erythrorhiza Cham. et Schltdl., characterised by rotate corolla with very short tube, longer filaments and long linear anthers both longer than the corolla tube. The other floral type is characterised by funnel-form corolla, with longer upwards broadening corolla tube with short or absent filaments and short, ovate anthers. This corolla type was recognised by Standley (1933) and described as Edithea based on E. floribunda Standl. Based on seemingly intermediate corolla forms the two genera were united by the classic taxonomic treatment of Lorence and Dwyer (1988), but micromorphological-anatomical evidence (Borhidi et al. 2004) reinforced Standley’s concept, supported also by the molecular studies of Stranczinger et al. (2010). These latter ones claimed the attention to another taxonomic split existing within the generic frame of Deppea s. str. The separating evidences are in the fruit morphology. The great majority — including the type of the genus has subglobose or obovate to broadly elliptical hypanthium and fruit, ± as broad as long, smooth or 2 to 8-costate, and obovate placenta and loculicidal dehiscence. In contrast, five species have cylindrical or oblong to linear-oblong hypanthium and fruit 2 to 4 times as long as broad, with 8 densely disposed longitudinal nerves, oblong to linear-oblong placenta and apical to septicidal dehiscence. Molecular evidence grouped these species into a separate clade placed from the vicinity of Deppea species next to Hoffmannia. Therefore we consider this species-group as a new genus named Deppeopsis with the following description, and selecting Deppea hernandezii Lorence as the type of the new genus.

Item Type: Article
Subjects: Q Science / természettudomány > QK Botany / növénytan
Depositing User: Ágnes Sallai
Date Deposited: 05 Jan 2018 08:19
Last Modified: 05 Jan 2018 08:19
URI: http://real.mtak.hu/id/eprint/71948

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