Published August 19, 2021 | Version v1
Taxonomic treatment Open

Rubus cryptopetalus A. Beek 2021, sp. nov.

Authors/Creators

Description

7. Rubus cryptopetalus A.Beek sp. nov.

Type:— SOUTH AFRICA. KwaZulu-Natal: Road from Vryheid to Louwsburg, 3.1 km before the exit to Louwsburg, south side of the road, 14 February 2018, Beek 2018.07 (holotype L; isotype NBG). (Figs 5C–D)

Diagnosis: —Primocane very densely greyish brown hairy; adaxially hairy, abaxially densely soft hairy, often tomentose, green or greyish; central leaflet narrow ovate or (ob-)ovate, with rounded or emarginate base, gradually attenuate into rather long tip; inflorescence dense; petals whitish or pinkish, 2–3 mm long.

Primocane (Fig. 5E) arching or scrambling, roundish to bluntly angular, diam. 5–9 mm, very densely greyish brown hairy, with stellate hairs; prickles 7–25 per 5 cm, unequal, subulate or compressed, with curved tip, up to 2–4 mm long; stipules 7–11 mm, linear, hairy. Leaves pinnate 5- to 7-foliolate, adaxially hairy (Fig. 5F), abaxially densely soft hairy, often tomentose, green or greyish; serrature with (rather) fine roundish short mucronate teeth, often double, with 2–5 teeth compound into unit; petiole 2.5–7.0 cm long, with 4–7 short, thick, curved, conic or somewhat compressed prickles, densely short hairy; central leaflet 48–82 mm long, narrow ovate or (ob-)ovate, with rounded or emarginate base, gradually attenuate into rather long tip, width–length index 0.56–0.59, length of petiolule 12–23% of length of leaflet; petiolule between lowest yokes 2–4 cm, petiolule of lowest leaflets 2–4 mm. Flowering branch (Fig. 5G) obtuse angular, very dense short hairy; prickles unequal, subulate or from 1–4 mm broad base bluntly compressed, with curved tip, up to 3–5 mm long. Leaves (Fig. 5H) pinnate 5- to 7-foliolate; serrature with (rather) fine roundish short mucronate teeth, often double, with 2–5 teeth compound into unit; central leaflet 44–75 mm long, elliptic-obovate, with attenuate to subemarginate base, gradually to rather abruptly attenuate into moderate tip, width–length index 0.52–0.67, length of petiolule 12–22% of length of leaflet. Inflorescence short pyramidal, with leafy base, very densely short hairy, with thick curved prickles; peduncles ascending, apical ones almost patent, basal with 5–20 flowers; pedicels 5–10 mm, densely tomentose, with 2–10 pricklets. Flowers: sepals (Fig. 5I) narrow, long pointed, 2–3 × 6–9 mm, clasping, grey, densely tomentose, with few subsessile glands and often some prickles; petals whitish or pale pink, very small, 2–3 mm; anthers glabrous; ovaries glabrous or with few hairs on tip becoming glabrous; receptacle with few hairs.

Ecology: —Roadsides, hedges, light woods.

Distribution: — KwaZulu-Natal and Eastern Cape, South Africa. How far the distribution spreads northward is not clear. Some plants from Mpumalanga correspond rather with R. adolfi-friedericii as Gustafsson (1934) already remarked.

Note: — Harvey & Sonder (1862: 288) consider the possibility that Ecklon & Zeyher 1707, which is a specimen of R. cryptopetalus, might be a separate species, but they leave this open, presenting it as a doubtful species.

Specimens:— SOUTH AFRICA. Mpumalanga: Buffelskloof Nature Reserve, near zig-zag road, 28 May 2019, Magoele 2919 (PRE0863891-0); High Forest entrance road, Uitkyk Plantations, 1785 m, 2 May 1985, Burrows 4644 (BNRH0010128-1); Dullstroom, Lydenburg District, Drews 186, (PRE); Pilgrimsrest District, Mariepskop, 1400 m, 12 January 1964, Bos 1081 (PRE). KwaZulu-Natal: Utrecht District, Donkerhoek, 21 January 1961, Devenish 530 (PRE0458414-0); Richmond, 7 December 1961, Maree 28 (PRE); Kokstad, Insizwa, 22 February 1972, Strey 10731 (PRE). Eastern Cape: Nieuwepost ad Katrivier, Ecklon & Zeyher 1707 (‘ R. rigidus Sm?’) (BREM, inserted as R. ecklonii; NBG).

Notes

Published as part of Beek, Abraham Van De, 2021, Rubi Capenses: a further contribution to the knowledge of the genus Rubus (Rosaceae) in South Africa, pp. 1-71 in Phytotaxa 515 (1) on pages 24-25, DOI: 10.11646/phytotaxa.515.1.1, http://zenodo.org/record/8061143

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Linked records

Additional details

Biodiversity

Collection code
L
Event date
2018-02-14
Verbatim event date
2018-02-14
Scientific name authorship
A. Beek
Kingdom
Plantae
Phylum
Tracheophyta
Order
Rosales
Family
Rosaceae
Genus
Rubus
Species
cryptopetalus
Taxon rank
species
Taxonomic status
sp. nov.
Type status
holotype
Taxonomic concept label
Rubus cryptopetalus Beek, 2021

References

  • Gustafsson, C. E. (1934) Rubi Africani. Arkiv f ˆ r Botanik 26 A (7): 1 - 68.
  • Harvey, W. H. & Sonder, O. W. (1862) Flora Capensis. Being a systematic description of the plants of the Cape Colony, Cafraria, & Port Natal, Vol. 2. Hodges, Smith & Co Dublin / A. S. Robertson, Cape Town, ix + 621 pp. https: // doi. org / 10.5962 / bhl. title. 821