Scyphostelma purpurascens (Benth.) Liede, Meve & Y. M. Pineda, 2023

Pineda, Yam M., Keller, Héctor A., Balderrama-Torrico, José A., Meve, Ulrich, Nürk, Nicolai M. & Liede-Schumann, Sigrid, 2023, Phylogenetics in Scyphostelma (Apocynaceae: Orthosiinae) and description of new species, Willdenowia 53, pp. 83-112 : 101

Scyphostelma purpurascens (Benth.) Liede, Meve & Y. M. Pineda , comb. nov.

≡ Metastelma purpurascens Benth., Pl. Hartw. : 215. 1845.

– Holotype: Ecuador, near the town of Quito , 1844, Hartweg 1191 ( K000197128 !; isotypes: BM000796239 digital image!, E00259776 digital image!, F V0043858 F digital image!, G00177152 , G00177153 digital image!, LD1219349 digital image!) . – Fig. 13 .

Remarks — Scyphostelma purpurascens belongs to the S. microphyllum group of species as suggested by the small leaves (4–15 × 2–3 mm) on long as well short shoots and flowers (<5 mm in diam.). Significant for S. purpurascens is a gynostegial corona much overtopping a sessile gynostegium, consisting of staminal corona lobes that are transversely rectangular in the basal half while the apical half terminates into a narrowly lanceolate, adaxially canaliculate tooth.

This species was not included in the phylogenetic analysis.

Figures

Fig. 13. Scyphostelma purpurascens – A: branch with leaves; B: pair of leaves; C: flower; D: corolla lobe; E: corolla trichomes; F: corona lobe; G: gynostegium with corona; H: pollinaria. – A–H from C. Cerón 2765 (QCNE). – Drawn by N. Arzt.