Rubus (ser. Radula) Focke 1877
Creators: name: Lepší, Martin
name: Lepší, Petr
name: Hohla, Michael
name: Király, Gergely
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Rosales
Rosaceae
Rubus

description: Key to the identification of Rubus lentianus and similar species   
1. Indentation on terminal leaflet of primocane leaves regular, crenate-serrate....................................................................................2.  
- Indentation on terminal leaflet of primocane leaves periodical, serrate............................................................................................3.  
 2. Prickles 3–10 per 5 cm of primocane length, 3–4(–5) mm long; apex of terminal leaflet of primocane leaves 5(–8) mm long.......................................................................................................................................................................................... R. salisburgensis   
 - Prickles (19–)24–29(–34) per 5 cm of primocane length, (6.5–)7–8(–8.5) mm long; apex of terminal leaflet of primocane leaves (12–)15–17(–21) mm long............................................................................................................................................ R. perpungens   
 3. Terminal leaflet of primocane leaves with incisions (2.5–)4.0–5.0(–6.0) mm deep, apex of terminal leaflet (16–)21–23(–26) mm long.................................................................................................................................................................................... R. lentianus   
- Terminal leaflet of primocane leaves with incisions 1–4 mm deep, apex of terminal leaflet 10–20(–25) mm long........................4.  
 4. Primocane with 150–280 hairs, 40–120 stalked glands per 1 cm of stem side and very slender prickles, colour of leaves beneath noticeably variable along the length of the primocane, green at the base and white-greyish at the top............... R. silvae-bavaricae   
- Primocane with fewer hairs (8–250) or fewer stalked glands (1–140) per 1 cm of stem side and with thicker prickles, colour of leaves beneath less variable along the length of the primocane........................................................................................................5.  
5. Primocanes with transitions between stalked glands and prickles, i.e. unequal stalked glands, acicles, bristles and sometimes also pricklets present; leaves distinctly hairy to the touch beneath and hairy or glabrous above.............................................................6.  
 - Primocanes usually without transitions between stalked glands and prickles, stalked glands usually short; leaves usually not distinctly hairy to the touch beneath (except for R. muhelicus, see 9) and glabrous above..............................................................8.   
 6. Primocanes sharply angled with (30–)40–100(–250) hairs per 1 cm of stem side and with prickles ± patent, straight; pedicels with stalked glands longer than the longest simple hairs; leaves usually with scattered hairs above........................... R. jarae-cimrmanii   
- Primocanes angled or bluntly angled with 3–20 hairs per 1 cm of stem side and with prickles declining, often slightly curved; pedicels with stalked glands shorter than the longest simple hairs; leaves glabrous or almost glabrous above...............................7.  
 7. Primocane leaves (very) distinctly pedate, with an ovate or obovate terminal leaflet abruptly narrowing into a (15–)20(–25) mm long apex, with a slightly cordate (rarely rounded) base and with distinctly periodical indentation; petals pale pink............................................................................................................................................................................................................... R. perpedatus   
 - Primocane leaves not distinctly pedate, with a broadly ovate to broadly obovate terminal leaflet abruptly narrowing into a 10–15(– 20) mm long apex, with a distinctly cordate base and with slightly periodical indentation; petals white........................ R. epipsilos   
 8. Primocane leaves 3–4(–5)-foliolate, terminal leaflet oblong obovate to broadly obovate; primocanes bluntly angled; carpels densely hairy; petals white to slightly pinkish................................................................................................................ R. vatavensis   
- Primocane leaves (3–)5-foliolate, terminal leaflet of a different shape; primocanes angled to sharply angled; carpels glabrous or with few hairs; petals pale pink to pink.............................................................................................................................................9.  
 9. Primocane leaves ± palmate, terminal leaflet broadly ovate to round with a distinctly undulating margin; prickles (9–)11–20(–22) per 5 cm of primocane length.......................................................................................................................................... R. muhelicus   
- Primocane leaves distinctly pedate, terminal leaflet elliptical to broadly elliptical, ovate or rhombic with a rather flat margin; prickles 5–12(–16) per 5 cm of primocane length...........................................................................................................................10.  
 10. Pedicels with stalked glands shorter than long simple hairs; primocanes sparsely to intermediately densely hairy, with slightly declining prickles; prickles on inflorescence rachis 7–8 mm long; inflorescence conical, its branches rather thick........... R. radula   
 - Pedicels with stalked glands as long as short simple hairs; primocanes glabrous or with very few hairs, with distinctly declining prickles; prickles on the inflorescence rachis 3–4 mm long; inflorescence broadly conical, diffuse, with rather thin branches.... R. rudis
description: Published as part of Lepší, Martin, Lepší, Petr, Hohla, Michael & Király, Gergely, 2023, Rubus lentianus, a new species from Austria and Germany-another piece of the puzzle from a European hotspot of Rubus series Radula, pp. 43-52 in Phytotaxa 594 (1) on pages 50-51, DOI: 10.11646/phytotaxa.594.1.2, http://zenodo.org/record/7868850