Capparis, L. IN

Fici, Silvio, 2021, A new species of Capparis L. (Capparaceae) from Sumatra (Indonesia), Adansonia (3) 43 (7), pp. 61-66 : 64

KEY TO THE SPECIES OF CAPPARIS L. IN SUMATRA

1. Flowers in supra-axillary rows ...................................................................................................................... 2

— Flowers in terminal or lateral inflorescences, or sometimes axillary .............................................................. 3

2. Shoots without cataphylls at the base; sepals 4-5 mm long; petals (5-) 6-8 mm long ............ C. pyrifolia Lam.

— Shoots with cataphylls at the base; sepals longer than 5 mm; petals 10-25 mm long ......... C. micracantha DC.

3. Inflorescence exclusively terminal on normal twigs ...................................................................................... 4

— Inflorescence axillary, on lateral twigs or sometimes terminal ....................................................................... 5

4. Sepals c. 9-12 mm long; gynophore 2.7-4.5 (-5) cm long .................................... C. trinervia Hook. f. & Th.

— Sepals 4-6 mm long; gynophore 2-5 mm long ........................................................................ C. erycibe Hall.

5. Flowers in short axillary racemes, or sometimes axillary ............................................................................... 6

— Flowers in axillary subumbels or terminal panicles of subumbels ................................................................. 7

6. Young twigs densely tomentose; stamens 20-30 (-50); gynophore densely tomentose; ovary 2.5 mm long, densely tomentose ............................................................................................................................ C. pubiflora DC.

— Young twigs glabrous; stamens less than 20; gynophore glabrous; ovary c. 1 mm long, glabrous ..................... ..................................................................................................................................... C. irenae Fici , sp. nov.

7. Petiole 1-2 (-2.5) cm long; sepals 12-14 mm long; petals 22-35 mm long ...................... C. callophylla Blume

— Petiole 0.2-0.7 (-1) cm long; sepals 3-7 (-8) mm long; petals (3.5-) 4-6.5 mm long .................................... 8

8. Petiole 2-4 mm long; stamens 12-15 (-20); gynophore 1-1.75 cm long; ovary c. 1 mm long .......... C. diffusa Ridl.

— Petiole (5-) 6-10 mm long; stamens 20-45; gynophore 0.4-1.2 cm long; ovary 1.5 mm long ..................... ................................................................................................................................. C. cantoniensis Lour.