Monanthotaxis couvreurii P.H.Hoekstra — Plate
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https://doi.org/10.3767/blumea.2021.66.02.01 |
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https://treatment.plazi.org/id/565E87CB-FFA9-F977-B01F-3883A4E02197 |
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Felipe |
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Monanthotaxis couvreurii P.H.Hoekstra — Plate |
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18. Monanthotaxis couvreurii P.H.Hoekstra — Plate View in CoL 2c–e; Map 12 View Map 12
Monanthotaxis couvreurii P.H.Hoekstra in Hoekstra et al.(2016) 79. — Type: T.L.P. Couvreur GoogleMaps 762 (holo consisting of 3 sheets: WAG.1576998, WAG.1576999, WAG.1577000; iso MPU1374962 About MPU ), Cameroon, Central Province, Ottotomo Forest Reserve, 45 km SW of Yaoundé, c. 5 km on main path into reserve, N3°35.21' E11°17.63', 700 m, 24 Apr. 2015.
Liana; young branches densely covered with ascending, reddish brown hairs 0.1–0.2 mm long, old branches greyish brown. Leaves: petiole 3–5 mm long, 0.8–0.9 mm diam, slightly grooved, indument as on branches; lamina oblong-elliptic to obovate or narrowly so, 4.5–12 by 1.8–4.3 cm, 2.1–2.9 times longer than wide, chartaceous, not punctate, discolorous, glossy green above, pale greyish green below, above sparsely covered with appressed, whitish hairs c. 0.1 mm long, soon becoming glabrous, below sparsely covered with appressed, whitish yellowish hairs 0.1–0.2 mm long, base cuneate to rounded, glands hardly visible, apex acute to acuminate, acumen to 10 mm long, secondary veins 7–11 per side, from base curving upwards, tertiary venation percurrent, sometimes hardly visible. Inflorescences cauliflorous, ramiflorous or axillary, composed of 2-flowered rhipidia in the axils of the leaves to many-flowered clusters on the trunk; sympodial rachis 1–15 mm long; flowering pedicels 4–20 mm long, 0.2–0.6 mm diam, sparsely covered with ascending to erect hairs c. 0.1 mm long; lower bracts strongly reduced or absent; upper bract absent; flower buds ovoid. Flowers bisexual; sepals slightly connate basally, broadly triangular, 0.8–0.9 by 0.9–1 mm, apex acute, densely covered with yellowish hairs; receptacle 1.2–2 mm diam, flat; petals pale yellow to white, 6, in two whorls, base of inner petals visible in bud, outer petals elliptic-ovate, 3.5–5 by 2–3.5 mm, outside densely covered with yellowish, short hairs, inside with a few hairs near the margins, inner petals narrowly elliptic to narrowly ovate, 3–4.5 by 1.2–1.5 mm, outside covered with yellowish hairs at the apex and centre, inside glabrous or with few hairs at the margins; stamens 13–15, in one whorl, connate at the base, linear-obconical, 0.8–0.9 mm long, filaments c. 0.4 mm long, thecae latrorse to extrorse, connective truncate, circular from above, papillate, staminodes absent; carpels 9–12, subcylindric to narrowly ellipsoid, 1.2–1.3 by 0.3–0.4 mm, densely hairy, ovules 4, lateral, stigma subsessile, globose, c. 0.2 mm diam, glabrous. Monocarps and seeds not seen, but see the label of C. Farron 7359.
Distribution — Cameroon (Central Province).
Habitat & Ecology — In old secondary forest, on slope. Altitude: c. 700 m. Flowering: April, May.
Preliminary IUCN conservation status — Critically Endangered (CR): B2ab(iii). AOO: 8 km 2. Only known from the Ottotomo Forest Reserve in Cameroon. The surrounding forests of this reserve are increasingly degrading and the increase of human population intensifies the pressure on the forest ( Sassen & Jum 2007).
Note — Monanthotaxis couvreurii is the only species in the genus with basally connate stamens. Monanthotaxis couvreurii resembles M. aquila from Ivory Coast and M. atopostema from the Republic of the Congo and Democratic Republic of the Congo, but differs in having slightly more secondary veins with smaller spaces in between, and in the absence of staminodes.
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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