Piptostigma calophyllum Mildbr. &amp; Diels., Bot. Jahrb. Syst. 53 (3 - 5): 443 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 calophyllum

description: Piptostigma calophyllum Mildbr. &amp; Diels., Bot. Jahrb. Syst. 53(3-5): 443, 1915 Figs 85, 86; Map 10H Type. Cameroon. South Region; Ebolowa, <i>Mildbraed G.W.J. 5791</i>, 4 Jul 1911: holotype: B[B100154077]; isotypes: HBG[HBG502525, HBG502527, HBG50252]; L[L0196773]; P[P00363307, P00363307]; YA[YA0002833]. Description. Tree, 8-10 m tall, d.b.h. 6-20 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, <b>young foliate branches tomentose</b>. Leaves: petiole 4-11 mm long, 3-6 mm in diameter, <b>tomentose</b>, cylindrical, blade inserted on top of the petiole; <b>blade 30-66 cm long, 14-34 cm wide</b>, obovate, apex emarginate to mucronate, acumen 0.7-0.8 cm long, <b>base cordate to acute</b>, coriaceous, <b>below densely pubescent when young, densely pubescent when old</b>, above glabrous when young and old, discolorous, whitish below; midrib impressed, above pubescent when young, sparsely pubescent when old, below pubescent when young, glabrous when old; <b>secondary veins 30 to 40 pairs</b>, sparsely pubescent above; tertiary venation percurrent. Individuals bisexual; inflorescence cauliflorous, 2-2.5 cm long, peduncle like base 5-9 mm, axial internodes 2-4 mm long, <b>compact, sympodial rachis 10-15 mm long.</b> Flowers with 9 perianth parts in 3 whorls, 3 to 6 per inflorescence; pedicel ca. 6 mm long, ca. 3 mm in diameter, tomentose; in fruit 9-11 mm long, 3-4 mm in diameter, tomentose; bracts 2, one basal and one upper towards the lower half of pedicel, basal bract ca. 7 mm long, ca. 7 mm wide; upper bract ca. 7 mm long, ca. 7 mm wide; sepals 3, valvate, free, 4-5 mm long, 4 mm wide, ovate, apex acute, base truncate, brown, pubescent outside, glabrous inside, margins flat; petals free, outer petals shorter than inner; outer petals 3, 5-7 mm long, 3-4 mm wide, ovate, apex acuminate to obtuse, base truncate, light yellow, margins flat, pubescent outside, glabrous inside; inner petals 3, valvate, 50-60 mm long, 6-8 mm wide, ovate, apex acute, base truncate, pink to yellow, margins wavy, pubescent outside, pubescent inside; stamens 70 to 150, in 5 to 6 rows, 1 mm long, broad; connective discoid, glabrous, red; staminodes absent; carpels free, 8 to 10, ovary ca. 3 mm long, stigma globose, densely pubescent. Monocarps sessile, 2 to 5, 12-35 mm long, 10-28 mm in diameter, obovoid, apex cuspidate, <b>tomentose, smooth, not ribbed</b>, brown when ripe; seeds number not counted, ca. 15 mm long, ca. 10 mm in diameter, ellipsoid; aril absent. Distribution. From Cameroon to Gabon; in Cameroon known from the Central, South and Littoral regions. Habitat. An uncommon species; in lowland rain forests on non-inundated soils. Altitude 0-400 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Vulnerable B2ab(iii) (Cosiaux et al. 2019a f). Uses in Cameroon. None reported. Notes. <i>Piptostigma calophyllum</i> is characterized by its large obovate and coriaceous leaf blades (&gt; 30 cm) with a broadly cordate base, tomentose petioles and young foliate branches, compact inflorescences, and tomentose smooth monocarps. It is a lowland species. It is morphologically close to <i>P. submontanum</i>, but the latter has a decurrent to cuneate leaf blade base, muricate and glabrous monocarps, and occurs in submontane areas (&gt; 900 m a.s.l.). Specimens examined. <b>Central Region</b>: Edea (Mangombé), 3.8°N, 10.13°E, <i>01 January 1963</i>, <i>Letouzey R.</i> s.n. (P). <b>Littoral Region</b>: Mapubi 30 km before Edea on Yaoundé-Edea road On forestry road 5 km direction to Sanaga river, 3.84°N, 10.39°E, <i>28 February 2018</i>, <i>Couvreur T.L.P.</i> 1167b (K,MPU,P,WAG,YA); Bassin du Mungo, 4.17°N, 9.52°E, <i>01 June 1917</i>, <i>Fleury F.</i> 33400 (P); Edea Mangombe, 3.86°N, 10.14°E, <i>01 January 1956</i>, <i>Letouzey R.</i> 1936 (P,YA); Route Douala-Edéa près du km 28, 4.05°N, 9.689°E, <i>18 January 1962</i>, <i>Letouzey R.</i> 4011 (P,YA). <b>South Region</b>: Ngovayang, 3.23°N, 10.57°E, <i>01 June 2015</i>, <i>Kamdem N.</i> 295 (YA); Près Akak 10 km W Sangmeli 2.96°N, 11.88°E, <i>11 March 1970</i>, <i>Letouzey R.</i> 10157 (P,YA); Piste Meyo Ntem-Evouzok 75 km W Ambam Entre 1er et 3e bras du Ntem, 2.28°N, 10.52°E, <i>28 November 1979</i>, <i>Letouzey R.</i> 15272 (P,YA); Ebolowa Cameroon, 2.76°N, 10.91°E, <i>04 July 1911</i>, <i>Mildbraed G.W.J.</i> 5791 (B,L,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 279-281, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Le Thomas, A, 1969b. Annonacees. In: Aubreville, A, Ed., Flore du Gabon. Museum National d'Histoire Naturelle, Paris: 1 - 371", "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"]}