Jacqueshuberia Ducke, Arch. Jard. Bot. Rio de Janeiro 3: 118. 1922.
publication ID |
https://dx.doi.org/10.3897/phytokeys.240.101716 |
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https://treatment.plazi.org/id/782C34C2-88C9-92E9-C437-72647222CEC5 |
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scientific name |
Jacqueshuberia Ducke, Arch. Jard. Bot. Rio de Janeiro 3: 118. 1922. |
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Jacqueshuberia Ducke, Arch. Jard. Bot. Rio de Janeiro 3: 118. 1922. View in CoL
Figs 79 View Figure 79 , 80 View Figure 80 , 81 View Figure 81 , 85 View Figure 85
Type.
Jacqueshuberia quinquangulata Ducke
Description.
Small trees or shrubs, unarmed. Stipules pinnate. Leaves bipinnate; pinnae and leaflets opposite, (2) 4-30 pairs of pinnae, 7-80 pairs of leaflets per pinna. Inflorescences terminal racemes, elongated or corymbiform; bracts and bracteoles setaceous, caducous. Flowers bilaterally symmetrical; hypanthium cupulate or campanulate, slightly ribbed; sepals 5, free; petals 5, yellow or dark purplish red, ovate, slightly unequal, sessile, lacking a claw; androecium monomorphic, stamens 10, joined in lower part; pollen in monads, associated with viscin threads, coarsely reticulate; ovary sessile, stigma oblique capitate. Fruit a dehiscent, linear, compressed legume, ribbed on the edges, the two ligneous valves coiling backwards from the apex at dehiscence, 4-8-seeded. Seeds oblong-ellipsoid, compressed.
Chromosome number.
Unknown.
Included species and geographic distribution.
Seven species across north-western South America, where two are endemic in Amazonian Brazil, two in Venezuelan Guayana, one in Guyana, one in Colombia and one in Peru (Fig. 85 View Figure 85 ).
Ecology.
White sand forests of the Amazon basin, montane forests on sandstone and savannas in the Guiana Shield.
Etymology.
The generic name honours Jacques E. Huber (1867-1914), a Swiss botanist who explored the Amazon region.
Human uses.
Potentially of interest as an ornamental because of its wide range of flower colour, including red, purple, and yellow.
Notes.
Jacqueshuberia is characterised by the combination of foliaceous and pinnate stipules, bipinnate leaves, the pinnae and leaflets opposite, flowers bilaterally symmetrical with a cupular hypanthium and ten exserted stamens. The fruits are dehiscent, linear, with 4-8 seeds. The genus was last revised by Silva and Graham (1980), including a key to all species. Four species were subsequently described ( Cowan 1985; Barneby 1990; Stergios and Berry 1996).
Taxonomic references.
Barneby (1990); Cowan (1985); Ducke (1922); Silva and Graham (1980); Stergios and Berry (1996).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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