On the identity of the Teyde dog-rose (Rosaceae): evidence for a new endemic taxon from Tenerife, Spain Author Weller, André-Alexander André-Alexander Weller, Körnerweg 23, 73765 Neuhausen, Germany Author Reichert, Hans Hans Reichert, Kohlweg 16, 66123 Saarbrücken, Germany text Phytotaxa 2023 2023-01-10 578 3 261 274 http://dx.doi.org/10.11646/phytotaxa.578.3.4 journal article 10.11646/phytotaxa.578.3.4 1179-3163 7523164 Rosa dumalis ssp. teydensis Weller & H. Reichert Holotype :— SPAIN . Canary Islands : Tenerife, Cañadas del Teide , Roque del Rosal , Cañada de la Mareta , 2.100 m a.s.l. , 18 June 2019 , leg. A .- A . Weller , det. H . Reichert, TFC 53.627 ( FIGURE 1 ). Flowering branch ( 26 cm ) of shrub (ca. 2.5 m ), with a few, sickle-shaped prickles (removed for preparation purposes); leaves leathery, in living plant blue-green above, gray-green below, oval-shaped, 26–52 × to 50–86 mm ; leaflets seven, almost sessile to very shortly stalked (c. 1 mm ), partly overlapping, 6.5–29 x 4.5–20 mm , ovoid, towards inflorescence sometimes acute; margins crenate-serrate (uni- to multiserrate); teeth with sessile to shortly stalked glands; leaflets glandular below along midribs; rachis usually below lowest pair of leaflets with short hairs ( 0.1–0.2 mm long, occasionally several times longer), and straight to sickle-shaped prickles of 0.3–0.7 mm (1–10; mostly> 4, along rachis); stipules in upper parts of flowering branches 16–21 × 10–12.5 mm (lower stipules smaller), apically acute, with glandular margins; (one) flower pale pinkish, in living plant approx. 28 mm in diameter; petals obovoid, approx. 14 × 11 mm , terminally emarginate; orifice (one measured) 1.4 mm , pedicels c. 7.0– 7.5 mm long, hairy; sepals up to 13 mm long, glandular along margins, tomentosevillous inside, partly outside, with glabrous, glandular appendages of up to two third of length of sepals; hips dark brown to black brown, 5.2–6.0 × 4.5–5.5 mm . FIGURE 1. Holotype of Rosa dumalis ssp. teydensis Weller & H. Reichert ( TFC 53.267 ) (photo: Herbario TFC) Additional specimens:— SPAIN . Canary Islands : Tenerife, Cañadas del Teide: Isotype : Roque del Rosal , Cañada de la Mareta , 2.100 m a.s.l. , 18 June 2019 , leg. A .- A . Weller , WE-19618- Rd ; Las Cañadas , Montaña Diego Hernández , leg. E . R . Sventenius , 29 April 1944 , ORT 16209 ; Las Cañadas , ad pedem montis Guajara , Hab. in rupibus apricis, 2.400 m , leg. E . R . Sventenius , 29 April 1944 , ORT 2681 ; Topo de la Grieta , 21 May 1973 , leg. W . Wildpret et al ., TFC 3879 ; Topo de la Grieta , presentado en la zona umbrosa, 31 May 1973 , leg. W . Wildpret et al ., TFC 21.912 ; Roque del Agua , Cañada de la Grieta , 2.080 m , 20 June 2019 , foot of rock, leg. A .- A . Weller (det. H . Reichert ), WE-19620- Rd .