Pterichis obcordatilabia Kolan., Baranow, S.Nowak & A.Fuentes, 2020

4. Pterichis obcordatilabia Kolan., Baranow, S.Nowak & A.Fuentes View in CoL , sp. nov. — Fig. 7 View Fig

The species is similar to P. acuminata from which it differs by the whitish petals,lip being yellowish with brown stripes,oblong-ligulate petals which are not widened near the middle and lip being obcordate in outline, widest near the base of the apical lobe (see notes). — Type: S. Achá et al. 213 A (holo LPB; iso LPB), Bolivia, La Paz, Prov. Bautista Saavedra, Área Natural de Manejo Integrado Apolobamba , sector Chaka antiguo, camino de herradura entre Laji-Sorapata y Apolo, alt. 3576 m, 1 Apr. 2009. Paratype : I. Jimenez 5559 et al. ( LPB), Bolivia, La Paz, Prov. Nor Yungas, PN-ANMI Cotapata, en la estación eléctrica Chuspipata , por el sendero que comunica las torres eléctricas, S16°17'09" W67°50'00", alt. 3130 m, 15 Feb. 2010 GoogleMaps .

Etymology. In reference to the obcordate lip shape – derived from the

Latin ob- (‘towards’) - cordata (‘heart-shaped’) and labium (‘lip’).

Plant 18–45 cm tall, leafless during flowering. Scape erect, terete, apically glandular-puberulent, with 3–5 tubular, acumi- (sect. Acraea View in CoL ) petals are adnate to the dorsal sepal and ciliate along margins and the basal part of the lip is reniform in outline. Pterichis acuminata View in CoL was not accepted by some authors (e.g., Schweinfurth 1958) who considered it as a synonym of P. galeata View in CoL . The two species differs in lip form (distinctly auriculate in P. galeata View in CoL , without prominent auricles in P. acuminata View in CoL ) and petals size and shape (subequal in length to sepals and not unguiculate, oblong-lanceolate to lanceolate-sagittate in P. acuminata View in CoL vs slightly longer than sepals and unguiculate, lanceolate-elliptic in P. galeata View in CoL ). The concept of two separated species was accepted in the more recent publications (e.g., Garay 1978, Kolanowska & Szlachetko 2017).

The type material consists of six plants. During our visit in LPB this material was not yet mounted on herbarium sheaths .