Castanopsis grandicicatricata

Vuong, Duy Hung & Xia, Nian-He, 2014, Two new species in Castanopsis (Fagaceae) from Vietnam and their leaf cuticular features, Phytotaxa 186 (1), pp. 29-41 : 38-39

Key to Castanopsis grandicicatricata , C. multiporcata and close related affinities in adjacent areas

1a. Cupules 1–2.5 cm in diameter; cupule spines 1–7 mm long, not completely covering the wall of cupule ...................................... 2.

1b. Cupules 2.5–8 cm in diameter; cupule spines 10–30 mm long, completely covering the wall of cupule ....................................... 8.

2a. Nuts hairy, longitudinally ribbed ...................................................................................................................................................... 3.

2b. Nuts glabrous, longitudinally without ribbed.................................................................................................................................... 5.

3a. Leaf blade margin entire; cupule set with spines, 3–7 mm long, arranged in 4–5 curving rows .................................................... 4.

3b. Leaf blade margin incised in the apical half; cupule set with tubercles, ca. 2 mm long, usually arranged irregularly ....................... ................................................................................. C. acuminatissima ( Blume 1851: 283) A. de Candolle in Hance (1863: 182)

4a. Leaf blade 5–8 cm long, abaxially glabrescent; petioles 0.3–0.7 cm long; nut scar concave .................................. C. multiporcata

4b. Leaf blade 10–15 cm long, abaxially covered with stellate hairs; petioles 1–1.5 cm long; nut scar flat or convex ....................... ........................................................................................................................................................................................... C. buruana

5a. Leaf blade margin entire ................................................................................................ C. fleury Hickel & A. Camus (1921: 395)

5b. Leaf blade margin serrate to rarely sub-entire................................................................................................................................. 6.

6a. Cupule spines 3–6 mm long; secondary veins 6–9 pairs .............................................................. C. delavayi Franchet (1899: 194)

6b. Cupule spines usually less than 3 mm long; secondary veins 8–13 pairs ....................................................................................... 7.

7a. Mature cupules indehiscent, cupule set with spines ................................................................. C. echinocarpa Miquel (1863: 119)

7b. Mature cupules dehiscent, cupule set with tubercles ............................... C. carlesii ( Hemsley 1899: Pl 2591) Hayata (1917: 72)

8a. Cupules sessile .................................................................................................................................................................................. 9. 8b. Cupules stipitate, 0.4–0.7 cm long ................................................................................................................................................. 15.

9a. Branches glabrous, leaf abaxially glabrescent ............................................................................................................................... 10.

9b. Branches, leaf abaxially hairy ........................................................................................................................................................ 11.

10a. Petioles 1–2.5 cm long; cupule wall 2–3 mm thick; scar covering 1/3 of nut ............................ C. kawakamii Hayata (1911: 300)

10b. Petioles 0.5–0.7 cm long; cupule wall ca. 1 mm thick; scar covering only basal part of nut ............................................................. .......................................................................................................................................... C. symmetricupulata Luong (1965: 105)

11a. Leaf blade 15–25 cm long. .............................................................................................................................................................. 12.

11b. Leaf blade 4–10 cm long. ............................................................................................................................................................... 13.

12a. Secondary veins 12–16 pairs; cupule wall ca. 2 mm thick; scar covering 1/3 of nut ............................................... C. mekongensis

12b. Secondary veins 16–20 pairs; cupule wall ca. 1 mm thick; scar covering only basal part of nut ....................................................... .................................................................................................................................................... C. phuthoensis Luong (1965: 102)

13a. Nuts hairy; infructescences 4–8 cm long......................................................................................................................................... 14.

13b. Nuts glabrous; infructescences ca. 15 cm long ................................................................................................................................... ................................................................................... C. hystrix Hooker f. & Thomson ex A. de Candolle in Hance (1863: 182)

14a. Secondary veins 12–16 pairs; cupules 5–6 cm in diameter ................................................................................................................. ............................................................... C. concinna (Champion ex Bentham 1854: 115) A. de Candolle in Hance (1863: 182)

14b. Secondary veins 6–8 pairs; cupules 3–4 cm in diameter ..................................... C. ninhhoensis Hickel & A. Camus (1926: 400)

15a. Cupules 2.5–5 cm in diameter; scar covering 1/4–1/3 of nut ........................................................................................... C. javanica

15b. Cupules 6–7 cm in diameter; scar covering 2/3 of nut ...................................................................................... C. grandicicatricata