Rosa dumalis ssp. teydensis Weller & H. Reichert

Weller, André-Alexander & Reichert, Hans, 2023, On the identity of the Teyde dog-rose (Rosaceae): evidence for a new endemic taxon from Tenerife, Spain, Phytotaxa 578 (3), pp. 261-274 : 263-265

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.

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 .

Figures

FIGURE 1. Holotype of Rosa dumalis ssp. teydensis Weller & H. Reichert (TFC 53.267) (photo: Herbario TFC)