Piptostigma pilosum Oliv., J. Linn. Soc., Bot. 8: 159 1964
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 pilosum

description: Piptostigma pilosum Oliv., J. Linn. Soc., Bot. 8: 159, 1964 Figs 92, 94; Map 12A = Piptostigma giganteum Hutch. &amp; Dalziel, Bull. Misc. Inform. Kew: 151, 1927. Type. Nigeria. Cross River State, Oban District, Talbot P.A. 1336, no date: holotype: K[K000199007]; isotype: K[K000199006]. = Piptostigma latipetalum Baker f.; <i>nom. nud.</i> Type. Nigeria. Cross River State; Old Calabar, <i>Thomson W.C. 61</i>, no date: holotype: K[K000199008]; isotype: B[B100154081]. Description. Tree, up to 12 m tall, d.b.h. 8-10 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches densely pubescent. Leaves: petiole 2-4 mm long, 2-3 mm in diameter, densely pubescent, cylindrical, blade inserted on top of the petiole; blade 25-41 cm long, 9-17.2 cm wide, <b>narrowly elliptic to elliptic or narrowly obovate to obovate</b>, apex acuminate, acumen 1.1-2.7 cm long, base rounded to cordate, subcoriaceous, below sparsely pubescent when young and old, above glabrous when young and old, discolorous, whitish below; midrib impressed, above densely pubescent when young and old, below densely pubescent when young, densely pubescent when old; secondary veins 20 to 28 pairs, glabrous above; tertiary venation percurrent. Individuals bisexual; inflorescence cauliflorous or on old leafless branches, axillary, peduncle like base ca. 10 mm long, axial internodes 3-23 mm long, <b>compact to sublax</b>, sympodial rachis 35-50 mm long. Flowers with 9 perianth parts in 3 whorls, <b>1 to 3 per inflorescence</b>; <b>pedicel 10-25 mm long</b>, ca. 3 mm in diameter, tomentose; in fruit 10 mm long, 3 mm in diameter, tomentose; basal bract ca. 12 mm long, ca. 5 mm wide; upper bract ca. 12 mm long, ca. 5 mm wide; sepals 3, valvate, free, 7-8 mm long, 6-7 mm wide, ovate, apex acute, base truncate, brown, pubescent outside, glabrous inside, margins flat; petals free, outer petals shorter than inner; outer petals 3, 7-8 mm long, 3-3.5 mm wide, obovate, apex acuminate, base truncate, light yellow cream to red towards the base, margins flat, pubescent outside, glabrous inside; inner petals 3, valvate, 30-60 mm long, 8-15 mm wide, elliptic, apex acute, base truncate, pink, margins wavy, pubescent to densely pubescent outside, pubescent inside; stamens numerous, in 6 to 8 rows, 1 mm long, broad; connective discoid, glabrous, red; staminodes absent; carpels free, <b>5 to 8</b>, ovary ca. 1 mm long, stigma globose, pubescent. Monocarps sessile, 2 to 5, 13-30 mm long, 8-18 mm in diameter, ellipsoid to ovoid, apex cuspidate, <b>pubescent, finely warty, longitudinally ribbed with ca. 6 ribs, light yellow to orange when ripe</b>; seeds up to 7 per monocarp, 1.5-3.5 mm long, 2-3 mm in diameter, ellipsoid; aril absent. Distribution. A central African species, from south eastern Nigeria to Gabon; in Cameroon known from East, South and mainly South-West regions. Habitat. A fairly uncommon species; in the understory of primary and old secondary rain forests. Altitude 50-390 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Least Concern (LC) (Cosiaux et al. 2019a q). Uses in Cameroon. None reported. Notes. <i>Piptostigma pilosum</i> resembles <i>P. macrophyllum</i> because of the large size of their leaf blades (25-41 cm in both species). However, the leaf blades of <i>P. pilosum</i> are mostly elliptic (sometimes however they can be obovate) with a rounded or cordate base, while those of <i>P. macrophyllum</i> are always obovate with an acute to obtuse base and the flowering pedicel is longer (10-25 mm versus 8-10 mm in <i>Piptostigma macrophyllum</i>). The inflorescence of <i>P. pilosum</i> generally presents few flowers per inflorescence (1 to 3) while there are 3 to 6 in <i>P. macrophyllum</i>. The species <i>P. fugax</i> and <i>P. oyemense</i> also have few flowers per inflorescence (1) but these species have fewer carpels (1 to 3 versus 5 to 8 in <i>P. pilosum</i>). Specimens examined. <b>East Region</b>: 78 km south of Yokadouma 30 km after Ngato 15 km after river ALPICAM 'base de vie’ then 40 km on forestry road starting 4 km before Maséa village, 3.15°N, 14.72°E, <i>05 March 2019</i>, <i>Couvreur T.L.P.</i> 1204 (MPU,WAG,YA). <b>South-West Region</b>: Near Bai Kuke SE of Mbonge, 4.53°N, 9.11°E, <i>25 January 1958</i>, <i>Keay R.W.J.</i> 37372 (P); Along footpath from Ndian River at PAMOL field 69 and transect P, 5.01°N, 8.833°E, <i>24 January 1985</i>, <i>Thomas D.W.</i> 4311 (P,YA); Korup National Park, 5.01°N, 8.833°E, <i>12 April 1985</i>, <i>Thomas D.W.</i> 4755 (MO); Limbe W of Njonji Lake, 4.13°N, 9.016°E, <i>27 January 1994</i>, <i>Wieringa J.J.</i> 2030 (U,WAG).
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 305-307, 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"]}