Monanthotaxis submontana P. H. Hoekstra, Blumea 66 (1): 200 2021
Creators: name: Couvreur, Thomas L. P.
name: Dagallier, Leo-Paul M. J.
name: Crozier, Francoise
name: Ghogue, Jean-Paul
name: Hoekstra, Paul H.
name: Kamdem, Narcisse G.
name: Johnson, David M.
name: Murray, Nancy A.
name: Sonke, Bonaventure
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Monanthotaxis
Monanthotaxis submontana

description: Monanthotaxis submontana P.H.Hoekstra, Blumea 66 (1): 200, 2021 Fig. 69; Map 9B = Monanthotaxis cauliflora sensu Cheek et al. (2004): 238. Type. Cameroon. Littoral Region; Nlonako, <i>Letouzey R.G. 14476</i>, 17 Mar 1976: holotype: WAG[WAG0053953]; isotypes: MO[2 sheets]; P[P01982361]. Description. Liana, 6-10 m tall, d.b.h. up to 5 cm. Indumentum of simple hairs; old leafless branches glabrescent, young foliate branches pubescent with short 0.1-0.2 mm long appressed to half-erect yellowish hairs. Leaves: petiole 6-10 mm long, ca. 1 mm in diameter, pubescent, weakly grooved adaxially, blade inserted on the side of the petiole; blade 7.2-14.1 cm long, 2.1-3.5 cm wide, <b>oblong to narrowly oblong or elliptic to narrowly elliptic</b>, apex acuminate to acute, acumen ca. 1.5 cm long, <b>base cuneate</b>, papyraceous, below sparsely pubescent when young, sparsely pubescent to glabrous when old, above glabrous when young and old, discolorous, whitish below; midrib sunken or flat, above glabrous when young and old, below sparsely pubescent when young and old; secondary veins 11 to 18 pairs, glabrous above; tertiary venation percurrent. Individuals bisexual [although fertile stamens can be absent leading to a female flower, thus possibly individuals gynodioecious], <b>inflorescences cauliflorous</b>, <b>a condensed panicle with many flowers; peduncle up to ca. 70 mm, densely pubescent with appressed to erect reddish brown hairs</b>; Flowers with 9 perianth parts in 3 whorls, <b>pedicel 7-55 mm long</b>, ca. 1 mm in diameter, densely pubescent with reddish hairs; in fruit 17-55 mm long, 1-2 mm in diameter; basal bract 1-2 mm long, 1-2 mm wide; upper bract 1-2 mm long, 1-2 mm wide; sepals 3, valvate, free, 3-2 mm long, ca. 2 mm wide, ovate, apex acute, base truncate, golden brown, densely pubescent outside, glabrous inside, margins flat; petals free, outer petals longer than inner, inner petals entirely covered in bud; outer petals 3, 3.6-5 mm long, 3.6-5.7 mm wide, broadly ovate to circular, apex obtuse, base truncate, golden green outside, yellowish inside, margins flat, densely pubescent outside, pubescent inside; inner petals 3, valvate, 0.4-1.3 mm long, 0.3-1.1 mm wide, broadly elliptic to circular, apex obtuse, base truncate, margins flat, pubescent outside, pubescent inside; stamens 0 to 2, in 1 row near the inner petals, ca. 1 mm long, clavate to oblong; connective reduced hidden by the thecae, pubescent; staminodes 0 to 14; <b>carpels free, 65 to 85</b>, ovary ca. 1 mm long, stigma globose, glabrous. Monocarps stipitate, stipes 7-14 mm long, 2 mm in diameter; monocarps up to 18, 23-45 mm long, 7-9 mm in diameter, moniliform, ellipsoid, apex apiculate, pubescent, smooth to slightly verrucose, constricted around seeds when more than 1, green when ripe; seeds 1 to 4 per monocarp, 13-14 mm long, 6-8 mm in diameter, ellipsoid; aril absent. Distribution. endemic to Cameroon, known from the South-West and Littoral regions. Habitat. In sub-montane or montane rain forests and swamp forests. Altitude 800-1700 m a.s.l. Local and common names known in Cameroon. None recorded. Preliminary IUCN conservation status. Endangered (EN) (Hoekstra et al. 2021). Uses in Cameroon. None reported. Notes. <i>Monanthotaxis submontana</i> is distinguished by its oblong to elliptic leaves with a cuneate base, cauliflorous inflorescences with a peduncle up to 70 mm long, flowering pedicels ranging from 7 to 55 mm long and flowers with 65 to 85 carpels. Specimens identified as <i>Monanthotaxis cauliflora</i> in Cheek et al. (2004) are in fact redetermined as <i>M. submontana</i> (Hoekstra et al. 2021). Specimens examined. <b>Littoral Region</b>: Nlonako Mt, 4.90°N, 9.943°E, <i>17 March 1976</i>, <i>Letouzey R.</i> 14476 (MO,P,WAG). <b>South-West Region</b>: Ridge on S side of LOH Mt, 5°N, 9.683°E, <i>23 January 1998</i>, <i>Cheek M.</i> 9067 (K,WAG,YA); Kodmin to Nzee Mbeng trail at N’dib river crossing, 5°N, 9.716°E, <i>14 February 1998</i>, <i>Cheek M.</i> 9202 (K,WAG,YA); Bakossi Mountains 1-8 km NNE of Menyum Village, 5.05°N, 9.612°E, <i>22 May 1987</i>, <i>Doumenge C.</i> 554 (MO,P); Nzimbeng road, 5.93°N, 9.716°E, <i>04 February 1998</i>, <i>Etuge M.</i> 4122 (K,WAG,YA); Kodmin road towards Mahusom, 5°N, 9.683°E, <i>12 November 1998</i>, <i>Etuge M.</i> 4442 (K,WAG,YA); Bakossi Mountains west of Bangem, 5.08°N, 9.7°E, <i>01 January 1986</i>, <i>Thomas D.W.</i> 5274 (MO,P,YA).
description: Published as part of <i>Couvreur, Thomas L. P., Dagallier, Leo-Paul M. J., Crozier, Francoise, Ghogue, Jean-Paul, Hoekstra, Paul H., Kamdem, Narcisse G., Johnson, David M., Murray, Nancy A. &amp; Sonke, Bonaventure, 2022, Flora of Cameroon - Annonaceae Vol 45, pp. 1-532 in PhytoKeys 207</i> on pages 232-235, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Cheek, M, Pollard, BJ, Darbyshire, I, Onana, JM, Wild, C, 2004. The plants of Kupe, Mwanenguba and the Bakossi Mountains, Cameroon. A conservation checklist. Kew Publishing. Cromwell Press, Trowbridge, Kew, U.K.", "Hoekstra, PH, Wieringa, JJ, Maas, JM, Chatrou, LW, 2021. Revision of the African species of Monanthotaxis (Annonaceae). Blumea 66: 107 - 221, DOI: https://doi.org/10.3767/blumea.2021.66.02.01"]}