Satranala J.Dransf. & Beentje, Kew Bull. 50: 87 (1995)

Primary tabs

http://media.e-taxonomy.eu/palmae/photos/palm_tc_185419_5.jpg

Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)

Discussion

Diagnosis

Biology And Ecology

Uses

Description

  • Robust solitary pleonanthic tree palm. Stem erect, irregularly ringed with leaf scars, somewhat swollen at the base, sometimes with aerial roots above the base of the trunk. Leaves induplicately costapalmate, neatly abscising under their own weight in mature individuals; sheath lacking auricles, with a conspicuous triangular cleft below the petiole, abaxially with scattered scales; petiole adaxially channelled near the base, distally ± flattened, abaxially rounded, the margins sharp, bearing minute irregular teeth distally, surfaces covered in patchy hairs, scales and white wax; adaxial hastula present, abaxial hastula absent; blade divided to ca. 1/4 to 1/3 its radius along adaxial folds into induplicate segments, further divided by short splits along abaxial folds, interfold filaments caducous, lamina covered with thin white wax, transverse veinlets conspicuous, close, somewhat sinuous; lamina anatomy dorsiventral. Staminate inflorescence interfoliar, solitary, shorter than the leaves, branching to 2 orders; peduncle ± rounded in transverse section; prophyll short, 2-keeled, included in the subtending leaf-sheath; peduncular bracts several; rachis longer than the peduncle; rachis bracts decreasing in size distally, tubular, rather loosely sheathing, with a broad, split, triangular limb, sometimes strongly keeled, densely covered in rusty tomentum; first-order branches crescent-shaped in cross-section, longer than the subtending bract, not bearing a prophyll, branching at the tip to produce a group of 3–9 radiating, catkin-like rachillae, rarely at the inflorescence tip the group reduced to a single branch; rachillae slightly sinuous, bearing a tight spiral of rounded, densely hairy, striate bracts, connate laterally and partially adnate to the axis to produce pits, densely filled with hairs. Staminate flowers unknown. Pollen (found remaining among inflorescence bracts) ellipsoidal, ± bi-symmetric; aperture a distal sulcus; ectexine tectate, coarsely perforate-rugulate, aperture margin slightly finer; infratectum columellate; longest axis 43–50 µm [1/1]. Pistillate inflorescence similar to the staminate but with fewer rachillae in groups of not more than 3. Pistillate flowers unknown. Fruit developing from a single carpel, globose, stigmatic remains basal; epicarp smooth, mesocarp fleshy and fibrous, endocarp hard, woody, externally with broad anastomosing flanges, one principal flange forming a crest along the vertical axis of the endocarp, the crest splitting during germination, allowing the cotyledonary stalk to emerge, the endocarp then splitting into two, internally the endocarp smooth, lacking a basal intrusion and lacking a germination pore opposite the embryo. Seed globose, basally attached; endosperm ruminate, deeply and irregularly penetrated by integumental tissue, solid, embryo apical. Germination remote-tubular, eophyll palmate with 2–3 segments. Cytology not studied. (J. Dransfield & N. Uhl & C. Asmussen & W.J. Baker & M. Harley & C. Lewis, Genera Palmarum. The evolution and classification of palms. 2008)A

Relationships