Drypetes

McPHERSON, Gordon, 2000, Drypetes (Euphorbiaceae) in Madagascar and the Comoro Islands, Adansonia (3) 22 (2), pp. 205-209 : 206-207

publication ID

https://doi.org/ 10.5281/zenodo.4605886

persistent identifier

https://treatment.plazi.org/id/145CDB52-FFE6-EA51-FEEC-D1278EEBD871

treatment provided by

Carolina

scientific name

Drypetes
status

 

Key to species of Drypetes View in CoL in Madagascar and the Comoro Islands

1. Leaves opposite or subopposite ........................................................................................ D. oppositifolia View in CoL

1’. Leaves alternate ........................................................................................................................................ 2

2. Stipules persistent, 3-9 mm long, 1.5-4 mm wide at base ...................................................... D. stipulacea View in CoL

2’. Stipules caducous or persistent, 0.5-2(-5) mm long (if over 2 mm long, then less than 1 mm wide at base)

3. Specimen pistillate .................................................................................................................................... 4

3’. Specimen staminate ................................................................................................................................ 12

4. Ovary 2-locular; styles 2 .......................................................................................................................... 5

4’. Ovary 3-6-locular; styles 3-6 .................................................................................................................... 9

5. Sepals 5 (rarely -6), persistent; leaves spiny-dentate or entire .................................................................... 6

5’. Sepals 4, caducous or persistent; leaves shallowly dentate or entire ............................................................ 7

6. Petioles glabrous; fruiting pedicels 5-10 mm; leaves spiny-dentate or entire; Madagascar............................ .................................................................................................................................. D. madagascariensis View in CoL

6’. Petioles pubescent (sometimes obscurely so); fruiting pedicels 3-4 mm; leaves entire; Mayotte. D. darcyana View in CoL

7. Disk conspicuously pubescent; leaf blade length at least 3 times width .................................... D. ambigua View in CoL

7’. Disk glabrous (or sometimes obscurely pubescent in narrow ring at base of ovary); leaf blade length less than 3 times width ............................................................................................................................................ 8

8. Leaf blades 10-17 cm long, 4-8 cm wide; fruit 20-22 mm long; eastern forests ...................... D. thouarsii View in CoL

8’. Leaf blades mostly 5-9 cm long, rarely up to 13 cm long, 1.5-4(-6) cm wide; fruit 10-15 mm long; widespread .................................................................................................................................................. D. perrieri View in CoL

9. Sepals 5; Comoro Islands.................................................................................................... D. comorensis View in CoL

9’. Sepals 3; Madagascar.............................................................................................................................. 10

10. Fruit lobed on drying, often somewhat obconic; pedicels (2-) 5-18 mm; leaves often spiny-dentate but some times entire; stipules at least 1 mm long, broadly triangular ...................................................... D. bathiei View in CoL

10’. Fruit unlobed, spherical (unknown in D. thouarsiana ); pedicels 1-3 mm (unknown in D. thouarsiana ); leaves entire; stipules if over 1 mm long, then narrowly triangular .......................................................... 11

11. Stipules narrowly triangular, 1-4 mm long; leaf blades 2.5-8 cm long ................................ D. thouarsiana

11’. Stipules deltoid, less than 1 mm long; leaf blades (5-) 7-18 cm long ...................................... D. capuronii View in CoL

12. Sepals 5 .................................................................................................................................................. 13

12’. Sepals 3-4 .............................................................................................................................................. 15

13. Stamens 3 (rarely -4); Madagascar............................................................................ D. madagascariensis View in CoL

13’. Stamens 7-15; Comoro Islands.............................................................................................................. 14

14. Stamens ca. 15; leaves dentate ............................................................................................ D. comorensis View in CoL

14’. Stamens ca. 7; leaves entire .................................................................................................... D. darcyana View in CoL

15. Sepals 3 (occasionally mixed with flowers with 4 sepals); flowers borne on trunk or on branches (mostly in the axils of fallen leaves) .......................................................................................................................... 16

15’. Sepals 4; flowers usually in leafy axils ...................................................................................................... 18

16. Stamens (4-)5-7(-8); stipules 1-4 mm long, narrowly triangular; leaf blades 2.5-8 cm long. D. thouarsiana

16’. Stamens 8-16; stipules up to 2 mm long, broadly triangular; leaf blades (5-) 7-18 cm long ...................... 17

17. Stipules 1-2 mm long; leaves entire or spiny-dentate; pedicels at anthesis (2-) 8-17 mm long; stamens 8-12; widespread ................................................................................................................................ D. bathiei View in CoL

17’. Stipules less than 1 mm long; leaves entire; pedicels at anthesis 3-6 mm long; stamens 12-16; Masoala Peninsula and NE Madagascar.............................................................................................. D. capuronii View in CoL

18. Leaf blade length at least 3 times width; stamens 8 .................................................................. D. ambigua View in CoL

18’. Leaf blade length less than 3 times width; stamens 4 .............................................................................. 19

19. Leaves 10-17 cm long, 4-8 cm wide; bracteate bud clusters ca. 8 mm in diam.; eastern forests. D. thouarsii View in CoL

19’. Leaves mostly 5-9 cm long, rarely up to 13 cm long, 2.5-5(-6) cm wide; bracteate bud clusters ca. 4 mm in diam.; widespread .................................................................................................................... D. perrieri View in CoL

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