Syagrus × altopalacioensis Soares & Assis (2013b: 88)

Noblick, Larry R., 2017, A revision of the genus Syagrus (Arecaceae), Phytotaxa 294 (1), pp. 448-450 : 448-450

66. Syagrus × altopalacioensis Soares & Assis (2013b: 88) . ( S. pleioclada × S. duartei )

Type:— BRAZIL. Minas Gerais: município de Santana do Riacho, Fazenda Alto do Palácio , próximo à Cachoeira do Coronel , 23k 0651840 7868433 (–19.27, –43.56), 16 June 2013, K. Soares, L. Assis & A. G. Vieira 57 (holotype HDCF) .

Figure 90 map.

Small, solitary palm with columnar Stem ca. 1.7 m × 10 cm, ringed, covered with leaf base remains. Leaves 10, ca. 70–80 cm long; sheathing leaf base ca. 37 cm long; pseudopetiole 15–20 cm long; petiole 4 × 1.2 cm long, covered with a ferruginous indument; rachis 65–70 cm long, densely covered with a ferruginous indument; leaflets green, slightly lighter on the abaxial surface, long-lanceolate, rigid, thin-leathery with midrib covered with tomentum abaxially, 35–40 along one side, in clusters of 2–4, inserted at various angles, giving the leaf a plumose appearance, clusters separated by 5–8 cm; basal leaflets 25–30 × 0.8 cm, middle leaflets 35–40 × 1.5–2.0 cm, apical leaflets 20– 25 × 0.6–0.7 cm with an asymmetric tip. Inflorescence erect to pendulous, spirally branched; prophyll 30–35 × 3 cm; peduncular bract 85–100 cm long, expanded portion 30–35 × 7.5–9.5 cm, including a 1 cm beak, thickness not measured, narrow, woody, sulcate; peduncle ca. 54–60 cm × 5–6 mm, elliptical in cross-section, densely covered

A REVISION OF THE GENUS SYAGRUS

Phytotaxa 294 (1) © 2017 Magnolia Press • 225 with tomentum; inflorescence axis ca. 20–26 cm long; rachis 15–20 cm long; rachillae, spirally arranged, 10–12, 5.0– 6.2 cm long at the apex, 7.5–10.5 cm in the middle, 10–13 cm at the base; staminate flowers 13 mm long at the apex, cream, yellow-green to yellow, sepals less than 1 mm long, glabrous, petals 12 × 3 mm with acute tips, glabrous, stamens 6 mm long, anthers 5–6 mm long, filaments not measured, pistillode not measured, basal pistillate flowers pyramidal or ovoid, 12–15 × 5–7 mm, yellow, sepals 12–15 mm long, petals 10–13 × 10–12 mm, glabrous, pistil 12–15 mm long, stigmas not measured, glabrous. Fruit ovoid, 4.5 × 3 cm, cream or yellowish-green when mature, covered by ferruginous indument, epicarp less than 0.5 mm thick, mesocarp thickness not measured, succulent and fibrous; endocarp ovoid, 3.2 × 2 cm; seed ellipsoid, endosperm homogeneous.

Common name:— None recorded.

Etymology:— The specific epithet, altopalacioensis , refers to the Alto do Palácio Private Reserve, RPPN (Reserva Particular do Patrimônio Natural), located in Santana do Riacho, Minas Gerais, Brazil, where the hybrids were found.

Distribution and habitat:— Only two plants found at the Alto do Palácio Private Reserve, with one being a young plant.

Conservation:— Rare. Only two plants found to date.

Phenology:— Unknown.

Uses:— None recorded.

Notes:— This hybrid shows characters intermediate between S. pleioclada and S. duartei . It differs from S. pleioclada by taller stems (vs. short stems usually less than 1.5 m) and by leaflets inserted in different planes (vs. deflexed). It differs from S. duartei by having fewer leaflets, which are widely spaced (vs. closely and evenly spaced leaflets).

Representative specimens:— Known only from the type specimen.

Figures

FIGURE 90. Distribution map of Syagrus hybrids. S. × altopalacioensis, S. × andrequiceana, S. × campos-portoana, S. × cipoensis, S. comosa × elata, S. × costae, S. × lacerdamourae, S. × matafome, S. × mirandana, S. × serroana, S. × teixeiriana, and S. × tostana.