Rubus allegheniensis Porter 1896

25. Rubus allegheniensis Porter (1896: 153).

Lectotype (designated by Bailey 1944: 522):— USA. Pennsylvania: ‘ Rubus villosus, Ait., var. montanus, mihi Pocono Summit. Monroe Co, Penns. Aug. 15/89 ’, Porter s.n., (lectotype NYBG 5990 [http://sweetgum.nybg.org/science/vh/specimen-details/?irn=239862]; isolectotype PH00040760)

Pictures: —http://rubus-nederland.nl/nl/soorten/systematische-namenlijst/24-braam-genus-rubus-l/braam-subgenus-rubus/zwarte-braamsectie-rubus/staande-braam-subsectie-rubus/trosbraam-serie-alleghenienses-l-h-bailey-a-berger/244-r-allegheniensis

Primocane erect, diam. 4–7 mm, angular, furrowed, pilose at tip, later becoming glabrous, with numerous sessile and subsessile glands; prickles 1–4 per 5 cm, up to 3–5 mm long; stipules linear-lanceolate, 8–12 mm, with some stipitate glands. Leaves 5-foliolate, adaxially hairy, abaxially soft, with long hairs on veins; serrature narrow, very acute with straight or slightly curved teeth; petiole 6–9 cm, moderately hairy, with 2–8 weak declining or curved prickles; central leaflet 83–118 mm long, from cordate base, broad ovate-elliptical rather abruptly attenuate into long tip, width–length index 0.51–0.76, length of petiolule 28–53% of length of leaflet. Flowering branch rather densely hairy, with sessile, subsessile and stipitate glands; prickles few, acicular, 1–2 mm long. Inflorescence racemose, leafy only at base, hirsute and glandular, with few weak prickles; pedicels ascendant, 10–30 mm, hirsute, with 0–3 weak pricklets and 25–50 unequal, mostly short stipitate glands. Flowers: sepals 7–8 × ± 3 mm, loosely reflexed, green with white margin, ± appressed pilose, glandular; petals white, elliptic or obovate; stamens longer than greenish styles; anthers and ovaries glabrous; receptacle glabrous or with scattered hair.

Ecology: —Grassland.

Distribution in South Africa: —Hogsback (Eastern Cape), at the same field as R. laudatus.

Specimen:— SOUTH AFRICA. Eastern Cape: Hogsback, 21 October 2018, Beek 2018.116 (L).