Polish Botanical Journal 49(1): 5–9, 2004 RUBUS LUCENTIFOLIUS (ROSACEAE), A NEW SPECIES OF BRAMBLE FROM POLAND JERZY ZIELIŃSKI, PIOTR KOSIŃSKI & DOMINIK T OMASZEWSKI Abstract. Rubus lucentifolius Zieliński & Kosiński, sp. nov., a regional species belonging to the series Glandulosi (Wimm. & Grab.) Focke is described from south-western Poland. Morphologically it is a well-defined bramble distinguishable by the following combination of features: prickles and stalked glands yellowish; leaves pedate, 5-foliolate, light green, glabrous or subglabrous and ± shining beneath; leaflets narrow, shallowly serrate; carpels densely hairy; stamens as long or shorter than styles; sepals patent in fruit. Key words. Rubus, ser. Glandulosi, new species, Lower Silesia, SW Poland Jerzy Zieliński, August Cieszkowski Agricultural University, Department of Forest Botany, Wojska Polskiego 71d, PL-60-625 Poznań, Poland; e-mail: jeziel@rose.man.poznan.pl Piotr Kosiński, August Cieszkowski Agricultural University, Department of Botany, Wojska Polskiego 71c, PL-60-625 Poznań, Poland Dominik Tomaszewski, Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, PL-62-035 Kórnik, Poland In 1998 during fieldwork to investigate the occur- rence of Rubus species in south-eastern regions of Lower Silesia we noticed in several places a very conspicuous forest bramble which attracted our attention by its light green narrow-foliolate leaves. This taxon belonging to the series Glandulosi (Wimm. & Grab.) Focke was found later in other places along the Czech-Polish border, also beyond the study area, in the Kotlina Kłodzka basin. Rubus lucentifolius Zieliński & Kosiński, sp. nov. (Figs 1–3) Turio prostratus vel arcuatus, teretiusculus vel sub- angulatus, virescens vel ± vinosus, pilis sparsis usque numerosis, setis glanduliferis multis vel sparsis obsitus. Aculei ca 10–20 ad 5 cm, lutei usque 4 mm longi, subulati, paulo curvati vel rectiusculi, reclinati, in pili glanduliferi transientes. Folia 5-foliolata, breviter vel sat distincte pedata, utrinque viridia, supra glabra vel pilis sparsis obsita, subtus glabra vel parce pilosa, ± nitentes. Foliolum terminale plerumque manifeste reliqui major, breviter petiolulatum, (anguste) ovatum vel (anguste) ellipticum, longe acuminatum, subaequal- iter serratum; dentes principales excurvatis. Petioluli foliolorum infimorum 1–2 mm longi. Inflorescentia conica vel subcylindrica, usque ad apicem foliolosa, foliis infimis 3-natis. Pedicelli 10–20 mm longi, breviter pubescentes, setis glanduliferis multis, aculeisque aci- cularibus usque 1,5 mm longis. Sepala griseo-viridia, setis glanduliferis aculeolisque obsita, in fructu pa- tentia. Petala alba, ca 8 mm longa, anguste obovata. Receptaculum pilosum. Stamina longitudine stylorum vel stylos breviora. Germina dense pubescentia, saepe glabrescentia. – VI–VII. TYPE: S POLAND. PROV. OPOLE. CF4216. Eastern Sudety Mts. Opawskie Mts. Długota Mt., Dębowiec near Prudnik, 335 m, mixed forest, section 158, 29 Jul 1999, Kosiński, Tomaszewski & Zieliński (HOLOTYPE: KOR 41471). Barren stems low-arched, creeping at ends, terete or bluntly angled, green often ± suffused purple-brown, with scattered to rather numerous patent simple or tufted hairs and numerous to sparse stalked glands up to 1.0(–1.5) mm long. Prickles 10–20 per 5 cm, up to 4 mm long, slender, subulate, slightly curved or straight, distinctly de- clining, yellow, usually reddish at the base, grading into needle-like gland-tipped acicles and stalked glands. Leaves 5-foliolate, shortly to distinctly pedate, concolorous green, glabrous or with few scattered hairs above, glabrous or very sparsely hairy and ± shining beneath; terminal leaflets usu-