Quercus setulosa, Hickel & Camus, 1923

Li, Qiansheng, Li, Shengchun, Lin, Duoqing, Shao, Wen & Tu, Tieyao, 2018, Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China, Phytotaxa 373 (4), pp. 272-282 : 277

Key to the species of Quercus setulosa morpho-complex

1. Petiole (0.5–) 1.0– 2.5 cm, leaf apex acuminate to caudate................................................................................................................2

1. Petiole 0.2–0.5 cm, leaf apex acute....................................................................................................................................................4

2. Petiole 1.0– 2.5 cm, leaf blade thickly leathery, branchlets grayish-yellow, shortly tomentose............................. Q. pseudosetulosa

2. Petiole 0.5–1.5 cm, leaf blade thickly papery, branchlets glabrous, covered with white wax...........................................................3

3. Pistillate inflorescence up to 2.7 cm, pistillate flowers 5 or more, mature nut narrowly ellipsoid, 1.5–2.0 cm long........ Q. setulosa

3. Pistillate inflorescence 0.3–0.8 cm, pistillate flower 1, mature nut broadly ellipsoid, 1.0– 1.2 cm long ............. Q. bawanglingensis

4. Secondary veins branching 1–3 times, these branched secondary veins extending to the apex of the teeth ........... Q. phillyraeoides

4. Secondary vein branching once, one branch forming loops to join the upper secondary vein, the other extending to the apex of the tooth....................................................................................................................................................................................................5

5. Leaf apex with short acuminate tips, the teeth with sharp mucronate tips occurring in the upper ¾ of the leaf; leaf base cordiform to rounded..................................................................................................................................................................... Q. tarokoensis

5. Leaf apex acute, teeth shallowly obtuse and curving to the inner course, leaf base cuneate to broadly cuneate.................... Q. utilis