Rubus sect. Sozostyli

Wang, Huan-Chong, Ma, Jing-Xia & He, Zhao-Rong, 2016, Rubus pseudoswinhoei (Rosaceae), a distinct new species from Yunnan, southwest China, Phytotaxa 261 (2), pp. 147-156 : 151-152

Key to the species of Rubus sect. Sozostyli

1a. Leaf palmately compound, with 3–5 leaflets.....................................................................................................................................2

1b. Leaf simple.........................................................................................................................................................................................3

2a. Stipules and bracts palmately parted; leaflets sharply serrate; hairs of stamens caducous .................................................................. ...................................................................................................................................... R. playfairianus Hemsl. ex Focke (1910: 45)

2b. Stipules and bracts usually entire or serrate at apex; leaflets sparsely minutely serrate; hairs of stamens persistent.......................... .................................................................................................................................................. R. bambusarum Focke (1891 : t.1952)

3a. Leaves deeply divided........................................................................................................................................................................4

3b. Leaves undivided, sometimes incised or shallowly lobed..................................................................................................................5

4a. Leaf lobes lanceolate or narrowly oblong, margins sparsely minutely sharply serrate; inflorescences and calyx without glandular hairs, or only abaxial surface of calyx with sparse, glandular hairs; aggregate fruit black.................................................................. ........................................................................................................ R. henryi Hemsley & Kuntze (in Forbes & Hemsley 1877: 231)

4b. Leaf lobes elliptic or oblong, margins densely coarsely sharply serrate; inflorescences and calyx with sparse, glandular hairs; aggregate fruit red ................................................................................................... R. huangpingensis T. T. Yu & L. T. Lu (1982: 461)

5a. Inflorescences with glandular hairs....................................................................................................................................................6

5b. Inflorescences without glandular hairs.............................................................................................................................................13

6a. Stipules and bracts palmately parted; inflorescences with sparse glandular hairs .......................... R. refractus Léveillé (1907: 332)

6b. Stipules and bracts usually entire or serrate; inflorescences usually with dense glandular hairs.......................................................7

7a. Abaxial surfaces of leaves with light yellow, brown or rust-colored tomentum, the tomentum usually persistent...........................8

7b. Abaxial surfaces of leaves with white or gray tomentum, the tomentum persistent or caducous....................................................10

8a. Leaves lanceolate or elliptic-lanceolate.............................................................................................. R. gressittii Metcalf (1940: 25)

8b. Leaves broadly ovate, ovate to ovate-lanceolate................................................................................................................................9

9a. Leaves coriaceous, abaxially brown or rust-colored; inflorescences and calyces with intermixed needle-like prickles..................... ................................................................................................................................................................ R. dunnii Metcalf (1940: 22)

9b. Leaves not coriaceous, abaxially light yellow, inflorescences and calyces without needle-like prickles............................................ ...................................................................................................................................... R. lichuanensis T.T.Yu & L.T.Lu (1982: 462)

10a. Abaxial indumentum of leaves on the flowering and fruiting branches usually falling off entirely................................................11

10b. Abaxial indumentum of leaves on the flowering and fruiting branches persistent..........................................................................12

11a. Stipules usually persistent, 1.5–2 cm long, lateral veins of leaf 12–18 pairs, pedicels 0.8–1.5cm long, hypanthium 0.8–1.1cm in diameter, sepals 1–1.5 cm long .................................................................................. R. pseudoswinhoei Huan C. Wang & Z. R. He

11b. Stipules usually caducous, 0.5–0.8 cm long, lateral veins of leaf 6–12 pairs, pedicels 2–3.5 cm long, hypanthium approximately 0.6 cm in diameter, sepals 0.5–0.8 cm long ........................................................................................................... R. swinhoei Hance

12a. Leaves lobed, lateral veins 5–7 pairs, glandular hairs of inflorescences 2–4 mm long ................... R. hanceanus Kuntze (1879: 77)

12b. Leaves undivided, lateral veins 7–9 pairs, glandular hairs of inflorescences 1–2 mm long ................................................................. ........................................................................................................................................ R. doyonensis Handel-Mazzetti (1933: 487)

13a. Abaxial surfaces of leaves glabrous, or slightly hairy only along veins; terminal inflorescences corymbose-racemose.................... .......................................................................................................................................................... R. kawakamii Hayata (1911: 91)

13b. Abaxial surface of leaves tomentose; terminal inflorescences racemose.........................................................................................14

14a. Leaves not leathery, abaxially gray or yellowish gray tomentose, coarsely sharply serrate............................................................15

14b. Leaves leathery, abaxially densely tomentose, minutely shallowly serrate.....................................................................................17

15a. Aggregate fruits red; pedicels 1.5–3.5 cm long; outer sepals apically laciniate, inner sepals entire ................................................... ...................................................................................................................................... R. hemithyrsus Handel-Mazzetti (1933: 488)

15b. Aggregate fruits purplish black; pedicel 0.7–1.5 cm long; outer and inner sepals entire................................................................16

16a. Leaves narrowly obovate or broadly ovate-lanceolate, abaxial indumentum of leaves on flowering and fruiting branches persistent; stamens glabrous or anthers slightly villous...................................................................................................... R. preptanthus Focke

16b. Leaves elliptic or oblong-elliptic, abaxial indumentum of leaves on flowering and fruiting branches usually falling off entirely, stamens villous .............................................................................................................................. R. malifolius Focke (1890 : t.1947)

17a. Pedicel and abaxial surface of calyx with dense, needle-like prickles........................ R. fujianensis T. T. Yu & L. T. Lu (1982: 462)

17b. Pedicel and abaxial surface of calyx without needle-like prickles...................................................................................................18

18a. Mature fruits black; leaves abaxially rust-colored tomentellate, lateral veins 5–8 pairs; styles villous .............................................. ..................................................................................................................................... R. caudifolius Wuzhi (in Fu et al. 1979: 188)

18b. Mature fruits red; leaves abaxially densely yellowish or yellowish brown tomentose, lateral veins 7–11 pairs; styles glabrous or villous...............................................................................................................................................................................................19

19a. Leaves densely yellowish tomentose abaxially, lateral veins 8–11 pairs; petioles 0.8–1.5 cm; styles and ovary glabrous................. ........................................................................................................................................... R. oblongus T.T.Yu & L.T.Lu (1982: 462)

19b. Leaves densely yellowish brown tomentose abaxially, lateral veins 7–9 pairs; petioles 1.5–3 cm; styles and apex of ovary hairy ... ........................................................................................................................................... R. liui Yuen P.Yang & S.Y.Lu (1976: 111)