Manihot Manihotoides (Euphorbiaceae) - CNCFlora

78
Flora Neotropica
membranaceous, deeply lobed, lobes usually entire or shallowly pandurate. Inflorescence
a monoecious panicle, bracts and bracteoles foliaceous to setaceous, margins entire.
TYPE. Manibotjaniphoides Muell.-Arg.
DISTRIBUTION. (Fig 29).
Key to the Species of Sect Heterophyllae
1. Bracts and bracteoles setaceous, less than 0.25 cm wide.
2. Panicle with one principal peduncle; flowers distantly positioned in inflorescence (except
21. M. surinamensis); buds of staminate flowers ovoid-ellipsoid or slightly turbinate.
3. Abaxial lamina surface wax pattern pusticulate or reticulate (unknown in M. zehntneri);
panicles less than 10.0 cm long, sparsely branched; staminate buds usually less than
0.75 cm long; petiole attachment peltate (except in 19. M. zehntneri and 22a. M. tristis
subsp tristis).
4. Leaf lobes oblong, more than 12.0 cm long.
19. M. zebntneri.
4. Leaf lobes linear or obovate, less than 12.0 cm long.
5. Leaf lobes linear, less than 1.0 cm wide; venation most frequently craspedodromous,
sometimes camptodromous.
6. Inflorescence less than 5.0 cm long.
20. M. marajoara.
6. Inflorescence more than 5.0 cm long.
21. M. surinamensis.
5. Leaf lobes obovate or elliptic, more than 1.0 cm wide; venation camptodromous,
never craspedodromous.
22. M. tristis.
3. Abaxial lamina surface wax pattern smooth; panicles more than 10.0 cm long; well
branched; staminate buds usually more than 0.75 cm long; petiole attachment basal.
7. Leaf lobes and petioles densely pubescent.
23. M. janiphoides.
7. All parts glabrous.
8. Leaves more than 7 lobed, lobe bases more than 0.25 cm wide. 24. M. grahami.
8. Leaves 3-5 lobed, rarely 7, lobe bases constricted, less than 0.25 cm wide.
25. M. inflata.
2. Panicle with several principal peduncles arising from one basal point; flowers clustered at
terminal region of peduncles; staminate buds bifusiform. (Flowers of M. quinquefolia non
vidi.)
11. Leaf lobes more than 8.0 cm long, more than 2.5 cm wide; lobe bases usually more
than 0.25 cm wide; most parts pubescent.
12. Inflorescence moderately branched; flowers more than 0.75 cm long, ovary
tomentose; leaf lobes entire. 26. M. pilosa.
12. Inflorescence profusely branched; flowers less than 0.75 cm long; ovary glabrous;
leaf lobes pandurate.
27. M. corymbiflora..
11. Leaf lobes less than 8.0 cm long, less than 2.5 cm wide; lobe bases less than 0.25 cm
wide; all parts glabrous.
13. Lobe bases stiff, lobes held horizontally.
28. M. leptopoda.
13. Lobe bases flaccid, lobes with a tendency to droop.
29. M. quinquefolia.
1. Bracts and bracteoles foliaceous, more than 0.25 cm wide.
14. Petiole attachment peltate; stipules foliaceous, more than 1.5 cm long. 30. M. condensata.
14. Petiole attachment basal; stipules setaceous, less than 1.5 cm long.
15. Inflorescence more than 8.0 cm long; profusely branched; leaf lobes more than 3.5
cm wide; petiole-midrib junction with 2 minute lobules.
16. Leaves more than 12.5 cm long; lobe bases more than 0.5 cm wide; lamina
densely pubescent. Capsule surface smooth.
31. M. jolyana.
16. Leaves less than 12.5 cm long; lobe bases less than 0.5 cm wide; lamina
moderately pubescent; capsule winged.
32. M. handroana.
15. Inflorescence less than 8.0 cm long, sparsely branched. Leaf lobes less than 3.5 cm
wide; petiole-midrib junction without lobules. 33. M. pohlii.
19. Manihot zehntneri Ule, Bot. Jahrb. Syst. 114: 10. 1914; Pax & Hoffmann in Engler,
Pflanzenreich IV. 147(Heft 68): 48. 1919; Pax & Hoffmann in Engler, Pflanzenreich
IV. 147(Heft 85): 195, 196. 1924.
TYPE. Zehntner, L. 598: Brasil, Bahia: Riacho de Santa Anna, 21 Nov 1912 (photo
of syntype, F, NY).
Erect shrubs, ca 1.5 m tall. Leave alternate; petioles ca 8.0 cm long; lamina
nonpeltate; palmately 5 lobed; median lobes oblong, ca 15.0 cm long, apex acute.