Merianthera Kuhlm.
publication ID |
https://doi.org/ 10.5852/ejt.2023.888.2209 |
DOI |
https://doi.org/10.5281/zenodo.8247295 |
persistent identifier |
https://treatment.plazi.org/id/03F27F3B-F700-FFAF-AE13-FCFFFA9FF59D |
treatment provided by |
Felipe |
scientific name |
Merianthera Kuhlm. |
status |
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Genus Merianthera Kuhlm. View in CoL View at ENA
Arquivos do Instituto de Biologia Vegetal do Rio do Janeiro 1 (3): 231–233 ( Kuhlmann 1935), here amended.
Type species
Merianthera pulchra Kuhlm., Arquivos View in CoL do Instituto de Biologia Vegetal do Rio do Janeiro 1 (3): 231–233 ( Kuhlmann 1935).
Description (modified from Goldenberg et al. 2012)
Shrubs to treelets, sparsely to moderately glandulose-granulose. Leaves opposite, entire, acrodromous, caducous. Inflorescences terminal short panicles, depauperate few-flowered cymes or reduced to solitary flowers; bracts absent, bracteoles absent or small, caducous. Flowers pedicellate, 5(–6)-merous; hypanthium sometimes with a constriction above the ovary; calyx regularly or irregularly lobed, seldom calyptrate and dehiscing through a transversal, circumscissile slit; petals free, obovate to elliptic; stamens 10(–12), glabrous, strongly zygomorphic and dimorphic, filament strongly flattened, connective with one basal (descending) and one apical, erect (ascending) portion, ascending portion always 2-lobed, lobes curved backwards in the antesepalous stamens and not curved backwards in the antepetalous stamens, anthers slightly dorsally arched, with a dorsal or apical pore in the antepetalous stamens and an apical to slightly ventrally located pore in the antesepalous stamens. Ovary completely inferior, with a sterile, apical stylar column, (3–)4–5-celled, the protruding placentae axillary; style curved at the apex, glabrous or puberulous, stigma punctiform. Fruits costate, apically constricted or not, rupturing along the costae when mature or seldom through (3–)4 regular, longitudinal slits; seeds many, pyramidal, testa rugulose.
Key to the species of Merianthera (modified from Goldenberg et al. 2012)
1. Stems hollow, fistulose when dry; flowers solitary, either on top of a short peduncle (then a 1-flowered strongly reduced cyme) or not .......................................................................................................... 2
– Stems solid when dry; flowers in panicles or seldom in depauperate cymes with two or more flowers ............................................................................................................................................... 3
2. Leaves with an acuminate to abruptly acuminate apex; flowers bibracteolate, borne on a short peduncle; calyx not calyptrate, dehiscing through regular lobes ................ M. burlemarxii Wurdack View in CoL
– Leaves with a rounded or obtuse apex; flowers ebracteolate, not borne on a peduncle; calyx calyptrate, dehiscing through a transversal, circumscissile slit ............................................................................ ...................................................................... M. calyptrata R.Goldenb., Bochorny & Fraga View in CoL sp. nov.
3. Calyx regularly lobed; style basally puberulous or granulose-glandulose ....................................... 4
– Calyx irregularly lobed; style glabrous ............................................................................................. 7
4. Leaves glabrous on abaxial surface; petals purple ........................................................................... 5
– Leaves with dense indumentum on abaxial surface; petals pink ...................................................... 6
5. Hypanthium weakly costate and smooth; calyx lobes lacking external teeth; style glandular-puberulous on its basal half ........................................................... M. bullata R.Goldenb., Fraga & A.P.Fontana View in CoL
– Hypanthium strongly costate and rugose; calyx lobes with distinct, thick external teeth; style granulose-glandulose at the base ............................................. M. verrucosa R.Goldenb., Fraga & A.P.Fontana View in CoL
6. Leaves with strigulose abaxial surface, with curled, discrete trichomes ............................................ .............................................................................................................. M. sipolisii (Cogn.) Wurdack View in CoL
– Leaves with lanate abaxial surface, with arachnoid-amorphous, matted trichomes ........................... ......................................................................................................... M. eburnea R.Goldenb. & Fraga View in CoL
7. Leaves with petioles 12–29 mm long; panicles with more than 8 flowers .......... M. pulchra Kuhlm. View in CoL
– Leaves sessile or with petioles up to 9 mm long; depauperate racemes with up to 4(–5) flowers, reduced to triads, diads or sometimes single flowers .......................................................................... ................................................................................ M. parvifolia R.Goldenb., Fraga & A.P.Fontana View in CoL
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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Merianthera Kuhlm.
Goldenberg, Renato, Bochorny, Thuane, Amorim, André Márcio, Ziemmer, Juliana Klostermann & Fraga, Claudio Nicoletti de 2023 |
Merianthera pulchra
Kuhlm. 1935: 231 |