Piptostigma glabrescens Oliv., J. Linn. Soc., Bot. 8: 159 1864
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 glabrescens

description: Piptostigma glabrescens Oliv., J. Linn. Soc., Bot. 8: 159, 1864 Figs 87, 94; Map 11A = Piptostigma preussii Engl. &amp; Diels, Monogr. Afrik. Pflanzen.-Fam. 6: 54, 1901. Type. Cameroon. South-West Region, Barombi Station, <i>Preuss P.R. 251</i>, Apr 1890: holotype: B[B100154082]; isotype: K[K000105585]. = Piptostigma glabrescens Oliv. var. lanceolata Le Thomas, Fl. Gabon 16: 120, 1969. Type. Gabon. Ogooué-Ivindo, Bélinga, mines de fer, <i>Hallé N. 4087</i> , 12 Aug 1966: holotype: P[P00363300]; isotypes: P[P00323698, P00363299]. Type. Equatorial Guinea. Rio Muni; Kongui River, <i>Mann G. 1792</i>, Aug.-Sep 1862: holotype: B[B100154078]; isotype: K[K000199000, K000199706]; P[P00363305]. Description. Tree, 8-10 m tall, d.b.h. 12-15 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches pubescent. Leaves: petiole 2-3 mm long, 1-2 mm in diameter, pubescent, cylindrical, blade inserted on top of the petiole; blade 12-30 cm long, 4-8.5 cm wide, obovate, apex acuminate, acumen 1.4-1.7 cm long, base obtuse to acute, papyraceous, below pubescent when young, glabrous when old, above glabrous when young and old, discolorous, whitish below; midrib impressed, above glabrous when young and old, below pubescent when young and old; secondary veins 19 to 27 pairs, glabrous above; tertiary venation percurrent. Individuals bisexual; inflorescences cauliflorous, peduncle like base 5-20 mm long, axial internodes 10-150 mm long, <b>lax to panicle-like, sympodial rachis 20-70 mm long.</b> Flowers with 9 perianth parts in 3 whorls, 10 to 28 per inflorescence; pedicel 11-13 mm long, 2 mm in diameter, pubescent; in fruit 16-20 mm long, 6 mm in diameter, densely pubescent; bracts 2, one basal and one upper towards the lower half of pedicel, basal bract 4-5 mm long, 3 mm wide; upper bract 2-5 mm long, 1-2 mm wide; sepals 3, valvate, free, 4 mm long, 2 mm wide, triangular, apex acute, base truncate, brown, pubescent outside, glabrous inside, margins flat; petals free, outer petals shorter than inner; outer petals 3, 5-6 mm long, 2 mm wide, ovate, apex acute, base truncate, red, margins flat, pubescent outside, glabrous inside; inner petals 3, valvate, 30-50 mm long, 5-10 mm wide, ovate, apex acute, base truncate, red, margins wavy, pubescent outside, sparsely pubescent inside; stamens 90 to 110, in 6 to 7 rows, ca. 1 mm long, broad; connective discoid, glabrous, red; staminodes absent; carpels free, 5 to 8, ovary ca. 1 mm long, stigma globose, pubescent. Monocarps sessile, ca. 8, 20-65 mm long, 9-21 mm in diameter, <b>oblong to narrowly oblong</b>, apex sometimes mucronate, <b>glabrous or sometimes very sparsely pubescent</b>, <b>puncticulate</b> (covered by small blister-like pimples or wards), <b>irregularly and longitudinally ribbed</b>, color unknown; seeds 1 to 7 per monocarp, ca. 15 mm long, ca. 10 mm in diameter, ellipsoid; aril absent. Distribution. From Cameroon to Gabon, one specimen from Republic of Congo; in Cameroon known from the South, Littoral and South-West regions. Habitat. A common species when present; in forests and plantations on black volcanic soils. Altitude 200-1000 m a.s.l. Local and common names known in Cameroon. nom otoungui (Dial. Boulou, <i>Endengle, E. s.n.</i>). IUCN conservation status. Near Threatened B2ab(iii) (Cosiaux et al. 2019a h). Uses in Cameroon. None reported. Notes. <i>Piptostigma glabrescens</i> is morphologically similar to <i>P. multinervium</i> (also a common species in Cameroon). <i>Piptostigma glabrescens</i> however has glabrous older branches which are longitudinally striate (versus shortly or sparsely pubescent and non-striate), and monocarps which are puncticulate, and longitudinally ridged (versus muricate and not longitudinally ridged. Specimens examined. <b>Littoral Region</b>: Douala (route Razel), 4.05°N, 9.71°E, <i>01 January 1955</i>, <i>Endengle E.</i> 2061 (P); Forêt de Bakaka 3 km E of Eboné a village on km 11 Nkongsamba-Loum Road, 4.83°N, 9.9°E, <i>13 September 1971</i>, <i>Leeuwenberg A.J.M.</i> 8354 (WAG,YA); Hikoa Mahouda (chaine de la L’Hikoa Mandeng- 30 km ENE Edea), 3.87°N, 10.39°E, <i>17 December 1973</i>, <i>Letouzey R.</i> 12415 (K); Tissongo, 3.58°N, 9.9°E, <i>07 July 1976</i>, <i>McKey D.B.</i> 103 (K). <b>South Region</b>: SE slopes of Mt elephant SE of Kribi, 2.78°N, 10.01°E, <i>26 February 1970</i>, <i>Bos J.J.</i> 6415 (BR,C,K,LD,P,WAG,YA); ca 3 km N of Lolodorf road, 3.01°N, 10.05°E, <i>18 March 1970</i>, <i>Bos J.J.</i> 6594 (BR,K,LD,LM,MO,P,WAG,YA); 15 km before Kribi on N7 road from Ed 3.14°N, 9.968°E, <i>27 February 2018</i>, <i>Couvreur T.L.P.</i> 1158 (MPU,P,WAG,YA); Nkoemvone, 2.81°N, 11.13°E, <i>09 September 1975</i>, <i>de Wilde J.J.F.E</i> 8453a (BR,K,MO,P,WAG); Près Bella (45 km NE de Kribi), 3.25°N, 10.2°E, <i>25 January 1962</i>, <i>Letouzey R.</i> 4167 (P,YA); Bipindi, 3.08°N, 10.41°E, <i>01 January 1901</i>, <i>Zenker G.A.</i> 2396 (B,BR,G,K,L,P,WAG); Bipindi, 3.08°N, 10.42°E, <i>01 January 1908</i>, <i>Zenker G.A.</i> 3654 (BR,L,P); Bipindi, 3.08°N, 10.41°E, <i>01 January 1911</i>, <i>Zenker G.A.</i> 4006 (K,P); Bipindi, 3.08°N, 10.41°E, <i>01 January 1912</i>, <i>Zenker G.A.</i> 4472 (BR,L,P); Bipindi, 3.08°N, 10.41°E, <i>01 January 1914</i>, <i>Zenker G.A.</i> 505 (B,G,P,WAG). <b>South-West Region</b>: mountain circular road S of Koto II and the Onge river, 4.32°N, 9.064°E, <i>21 October 1993</i>, <i>Cheek M.</i> 5071 (K,YA); Korup National Park nature trail near suspension bridge, 4.98°N, 8.85°E, <i>01 February 1995</i>, <i>Cheek M.</i> 7230 (K,YA); Pente septentrionale de Nta Ali (1266)m) descente de la cote 1009 à Mbio 30 km SE de Mamfe, 5.59°N, 9.503°E, <i>21 June 1975</i>, <i>Letouzey R.</i> 13912 (P,YA); Barombi F R Station, 4.65°N, 9.4°E, <i>1890</i>, <i>Preuss P.R.</i> 251 (K).
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 284-287, 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"]}