Piptostigma macranthum Mildbr. &amp; Diels, Bot. Jahrb. Syst. 53 (1 - 2): 142 1915
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
Piptostigma
Piptostigma macranthum

description: Piptostigma macranthum Mildbr. &amp; Diels, Bot. Jahrb. Syst. 53(1-2): 142, 1915 Figs 88, 89; Map 11D = Piptostigma mayumbense Exell, J. Bot. 64 (Suppl. 1): 10, 1926. Type. Angola. Cabinda, M’bulu hills, Mayumbe, <i>Gossweiler J. 7807</i>, 15 Feb 1919: holotype: B[B100460898]. Type. Cameroon. South Region; Mimfia (Bipindi), <i>Zenker G.A. 2528</i>, 1902: holotype: B[B100154080]; isotypes:[BR0000013174743]; G[G00442261]; K[K000199001]; P[P00363281, P00363282, P00363283]; S[S07-13471]. Description. Tree, 6-18 m tall, d.b.h. 15-21 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches pubescent. Leaves: petiole 2-3 mm long, 2-3 mm in diameter, pubescent, cylindrical, blade inserted on top of the petiole; blade 14-31 cm long, 7-9 cm wide, <b>ovate to oblong</b>, apex acuminate, acumen 0.5 cm long, <b>base rounded to cordate</b>, subcoriaceous, below pubescent when young and old, above glabrous when young and old, discolorous, whitish below; midrib impressed, above pubescent when young and old, below densely pubescent when young, densely pubescent when old; secondary veins 16 to 30 pairs, glabrous above; tertiary venation percurrent. Individuals bisexual; inflorescence cauliflorous, pubescent all over, peduncle like base 6-25 mm long, axial internodes 10-20 mm long, <b>compact to sub-lax, sympodial rachis 10-70 mm long</b>. Flowers with 9 perianth parts in 3 whorls, 2 to 4 per inflorescence; pedicel 5-20 mm long, 3-5 mm in diameter, tomentose; in fruit 20-25 mm long, ca. 6 mm in diameter, pubescent; basal bract ca. 10 mm long, ca. 10 mm wide; upper bract ca. 10 mm long, ca. 10 mm wide; sepals 3, valvate, free, ca. 9 mm long, ca. 8 mm wide, triangular, apex acute, base truncate, brown, pubescent outside, glabrous inside, margins flat; petals free, outer petals shorter than inner; outer petals 3, 12-28 mm long, 9-11 mm wide, obovate, apex acute, base truncate, wine-brown, margins flat, pubescent outside, glabrous inside; inner petals 3, valvate, 40-55 mm long, 10-20 mm wide, elliptic, apex acute, base truncate, cream, margins wavy, pubescent outside, pubescent inside; stamens 280 to 320, in 10 to 11 rows, 1-2 mm long, broad; connective discoid, glabrous, red; staminodes absent; carpels free, 9 to 12, ovary ca. 2 mm long, stigma globose, pubescent. Monocarps sessile, 3 to 6, 30-40 mm long, 25-40 mm in diameter, <b>obovoid, apex acute, pubescent, muricate with projections up to 10 mm long, not ribbed, projections brown otherwise reddish when mature</b>; seeds 2 to 6 per monocarp, ca. 10 mm long, ca. 5 mm in diameter, ellipsoid; aril absent. Distribution. From Cameroon to the Republic of Congo; in Cameroon known from the South and Central regions. Habitat. A rare species in Cameroon; in forest edges or in closed forests along rivers. Altitude 50-500 m a.s.l. Local and common names known in Cameroon. Nom-owé (Dial. Yaoundé, <i>Letouzey s.n.</i>). IUCN conservation status. Least Concern (LC) (Cosiaux et al. 2019a k). Uses in Cameroon. None reported. Notes. <i>Piptostigma macranthum</i> is easily distinguished from other species of <i>Piptostigma</i> by its characteristic narrowly oblong to oblong leaf blade shape, shiny upper side of leaf blade, rounded and cordate leaf blade base and thick compact inflorescences. Specimens examined. <b>Central Region</b>: Ca 50 km S of Badjob ca 60 km SW of Eséka, 3.46°N, 10.5°E, <i>19 March 1964</i>, <i>de Wilde W.J.J.O</i> 2132 (BR,P,WAG); Akomimbang (Mbalmayo), 3.52°N, 11.5°E, <i>13 November 1957</i>, <i>Letouzey R.</i> 1937 (P); Akomimbang Mbalmayo, 3.52°N, 11.5°E, <i>13 November 1957</i>, <i>Letouzey R.</i> s.n. (P,YA). <b>South Region</b>: 10 km From Kribi Lolodorf road, 2.98°N, 9.966°E, <i>27 May 1969</i>, <i>Bos J.J.</i> 4647 (BR,K,MO,P,U,WAG,YA); Bezirk Kribi Vorland mit einzeln Hügeln bei Adjab 25 km Grand batanga near Eduma and Bidue, 2.93°N, 9.92°E, <i>25 July 1911</i>, <i>Mildbraed G.W.J.</i> 6118 (HBG); 51 SE de Campo Nkolmenbegue, 2.39°N, 10.3°E, <i>24 November 1992</i>, <i>Satabié B.</i> 1037 (YA); Efoulan, 2.74°N, 10.54°E, <i>04 December 2000</i>, <i>Tchouto Mbatchou G.P.</i> 3100 (KRIBI,WAG,YA); Bipindi, 3.08°N, 10.42°E, <i>01 January 1903</i>, <i>Zenker G.A.</i> 2528 (B,BR,G,L,P,WAG); Bipindi, 3.08°N, 10.42°E, <i>01 May 1902</i>, <i>Zenker G.A.</i> s.n. (P).
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 291-293, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Cosiaux, A, Couvreur, TLP, Erkens, RHJ, 2019a. Annickia affinis. The IUCN Red List of Threatened Species: e.T132512369A132513599. https://doi.org/10.2305/IUCN.UK.2019-3.RLTS.T132512369A132513599.en"]}