Cremastosperma chococola Pirie

Pirie, Michael D., Chatrou, Lars W. & Maas, Paul J. M., 2018, A taxonomic revision of the Neotropical genus Cremastosperma (Annonaceae), including five new species, PhytoKeys 112, pp. 1-141 : 1

9. Cremastosperma chococola Pirie Fig. 17 , Map 2

Cremastosperma chococola Pirie, Blumea 50: 47, f. 3. 2005.

Type.

COLOMBIA, Chocó: Alto de Buey, 500-1200 m a.s.l., 8 Jan 1973, Gentry, A.H. & Forero, E. 7286 (holotype: MO! [MO-047629]; isotype: COL! [COL000214771]).

Description.

Tree ca. 5 m tall; young twigs and petioles glabrous. Leaves: petioles 5-8 by 1.5-2 mm; lamina narrowly elliptic, 11-20 by 4-5.5 cm (index 3.7-4), chartaceous, dark/olive brown, shiny above, lighter pinkish-brown, matt below, glabrous above and below, base acute to cuneate, apex acuminate (acumen 7-10 mm long), primary vein ca. 1 mm wide at widest point, verrucose below, secondary veins 8-10, no intersecondary veins, distance between from 5 mm at the base to 30 mm closer to the apex, angles with primary vein from ca. 60° at the base to 60-70° closer to the apex, forming distinct loops, smallest distance between loops and margin 2.5-3.5 mm, tertiary veins reticulate. Inflorescence of single flowers, solitary or clustered in groups of at least two, on brachyblasts on the main trunk; peduncles, 2-3 by 1-1.5 mm (in fruit); pedicels 38-42 by 1 mm at the base, 1 mm at the apex (in fruit), peduncles and pedicels glabrous; lower bract(s) not observed; upper bract attached within basal half of pedicel, ovate, ca. 1 by 0.7 mm, obtuse, glabrous; flowers not observed. Monocarps 10-13, ellipsoid, strongly asymmetrical (stipes inserted within basal half of longest axis), 13-14 by 10-11 mm, with an excentric, to 0.2 mm long, apicule, green maturing through red to dark blue in vivo, dark brown in sicco; stipes 15-18 by ca. 1 mm increasing to 1.5 diam. when mature; fruiting receptacle depressed ovoid, 4-5 mm diam.; monocarps, stipes and receptacle glabrous. Seeds ellipsoid, orange-brown, pitted, 9-11 by 6-8 mm, raphe sunken, regular.

Distribution.

Pacific coast of Colombia ( Chocó).

Habitat and Ecology.

Tropical wet forest. At elevations of 0-1200 m. Flowering: not recorded; fruiting: January and June.

Notes.

The strongly asymmetric monocarps of Cremastosperma chococola resemble those of C. antioquense : see above for distinctions.

Preliminary conservation status.

Only three collections of C. chococola are known to us, from different localities but within a restricted region and only one of which is in a protected area. Endangered [EN] (Table 1 ).

Other specimens examined.

COLOMBIA. Chocó: Punta Lanas, 1 September 1989, Espina et al. 3188 (HUA, MO); Parque Nacional Utría, 6°20'N, 77°20'W, 0-100 m a.s.l., 5 Jun 1990, F. García & Agualimpia 390 (MO).

Figures

Map 2. Distribution of Cremastosperma alticola Pirie & Chatrou, C. antioquense Pirie, C. chococola Pirie, C. dolichopodum Pirie & Maas, C. longipes Pirie, C. novogranatense R. E. Fr., C. osicola Pirie & Chatrou, C. panamense Maas and C. stenophyllum Pirie

Figure 17. Cremastosperma chococola Pirie. a leaf and fruit (Gentry & Forero 7286).