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. 2012:(14):23-41.
doi: 10.3897/phytokeys.14.2520. Epub 2012 Jul 30.

Cuatrecasanthus (Vernonieae, Compositae): A revision of a north-central Andean genus

Harold Robinson  1 , Vicki A Funk
Affiliations

Cuatrecasanthus (Vernonieae, Compositae): A revision of a north-central Andean genus

Harold Robinson et al. PhytoKeys. 2012.

Abstract

Cuatrecasanthus is native to Ecuador and Peru and although several unusual characters define the genus, such as single flowered heads and corolla throat (limb) divided to the base with lobes that are thickened at the margins, the members of the genus were not recognized as especially closely related until relatively recently. All six species are described, including two new to science (Cuatrecasanthus kingii H. Rob. & V.A. Funk, sp. nov. and Cuatrecasanthus lanceolatus H. Rob. & V.A. Funk, sp. nov.), and one new combination is recognized (Cuatrecasanthus giannasii (Stutts) H. Rob. & V.A. Funk, comb. nov.). A key is provided along with images of the types, SEM photographs of the leaf surfaces, a distribution map, and illustrations of the two new species. All species are given a preliminary conservation status of Data Deficient in regard to the IUCN Red List of Threatened Species.

Keywords: Asteraceae; Critoniopsis; Ecuador; Neotropics; Peru.

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Figures

Figure 1.
Figure 1.
Cuatrecasanthus leaves: A Cuatrecasanthus lanceolatus showing projecting marginal tooth B Cuatrecasanthus kingii showing incurved tooth C Myceliform hairs on abaxial surface of leaf of Cuatrecasanthus giannasii.
Figure 2.
Figure 2.
Cuatrecasanthus leaf surfaces: A–B Cuatrecasanthus flexipappus. A Adaxial surface B Abaxial surface C–D Cuatrecasanthus giannasii C Adaxial surface, showing deeply insculpate veins D Abaxial surface.
Figure 3.
Figure 3.
Cuatrecasanthus leaf surfaces: A–B Cuatrecasanthus jelskii. A Adaxial surface B Abaxial surface C–D Cuatrecasanthus kingii. showing veins even with surface D Abaxial surface.
Figure 4.
Figure 4.
Cuatrecasanthus leaf surfaces: A–B Cuatrecasanthus lanceolatus. A Adaxial surface B Abaxial surface C–D Cuatrecasanthus sandemanii C Adaxial surface D Abaxial surface.
Figure 5.
Figure 5.
Photographs of Cuatrecasanthus types: A Cuatrecasanthus flexipappus, holotype (NY) B Cuatrecasanthus giannasii, holotype (S).
Figure 6.
Figure 6.
Photographs of Cuatrecasanthus types: A Cuatrecasanthus jelskii, lectotype (US) B Cuatrecasanthus kingii, holotype (US).
Figure 7.
Figure 7.
Cuatrecasanthus kingii: A Habit B Detail of adaxial surface of leaf C Cluster of heads D Single head containing one floret E Floret showing corolla lobes divided to base of limb, with thickened margins F Style G Achene with 8–10 ribs.
Figure 8.
Figure 8.
Photographs of Cuatrecasanthus types: A Cuatrecasanthus lanceolatus, holotype (US) B Cuatrecasanthus sandemanii, holotype (BM).
Figure 9.
Figure 9.
Cuatecasanthus lanceolatus: A Habit B Cluster of heads C Single head containing one floret D Floret showing corolla lobes divided to base of limb, with thickened margins and apical pubescence E Style F Achene with 8–10 ribs.
Figure 10.
Figure 10.
Distribution map of Cuatrecasanthus species.
See this image and copyright information in PMC

References

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