Hydnophytum mamberamoense Jebb & C. R. Huxley 2019, sp. nov.
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| author | Jebb, M. H. P. Huxley, C. R. |
| author_facet | Jebb, M. H. P. Huxley, C. R. |
| contents | <p><b>45. <i>Hydnophytum mamberamoense</i> Jebb & C.R.Huxley, <i>sp. nov</i>. — Fig. 48</b></p><p><i>Myrmecodia</i> species 1 ‘ <i>mamberamoensis</i> ’ C.R.Huxley & Jebb (1993) 332.</p><p>Tuber oblongum, laeve. Aperturae 0.2–0.6 cm, labrosae, arcuatim vel seriatim dispositae. Caules complures; internodia fertilia 2–9 cm. Stipulae triangulares, ad 1.6 per 0.6 cm, papyraceae, mox caducae. Lamina ovatoelliptica, 19 per 9 ad 40 per 14 cm, apice acuto, basi cuneato-attenuata, nervis 12–19,coreacea textura.Petiolus 9 cm. Inflorescentia binata,sessilis, obtecta pulvino pilorum bractealium et plurimorum fructuum ineffectorum, omnio ad 3.5 cm in diametro, plus minus contigua, ad instar densae spirae caulem ascenditis; pili bracteales ad 1.3 cm, badii. Calyx 1.5 mm, integer, supra altitudinem disci. Corollae tubus 8 mm, annulo pilorum infra faucem instructus;lobi anguste triangulares,ad 5 mm, unci ad 2.5 mm.Antherae 1.5 mm, ad faucem tubi. Stigma bifidum, supra antheras.Fructus et pyrenae ignota.</p><p>— Typus: <i>Docters van Leeuwen 9540</i> (holo L; iso A, BO, K, SING), New Guinea, Papua Province, Mamberamo river opposite Albatros biv,July 1926.</p><p><i>Etymology</i>. For the type locality.</p><p><i>Tuber</i> oblong, 18 by 11 cm; smooth-surfaced. Entrance holes 0.2–0.6 cm, rimmed; often in arcs or lines. <i>Stems</i> several, unbranched? to 50+ by 1.5 cm; internodes 2–9 cm when fertile. Lamina ovate-elliptic; 19 by 9 to 40 by 14 cm; apex acute; base cuneate, ultimately attenuate; veins 12–19; leathery in texture. Petiole 9 cm; stipule intrapetiolar, triangular, to 1.6 by 0.6 cm, papery, soon falling. Inflorescence paired, sessile, covered by a mass of bract hairs, to 3.5 cm across; more or less contiguous, appearing as a thick spiral up stem. Bract hairs to 1.3 cm, reddish brown, with numerous undeveloped fruits. <i>Flowers</i> [1]?heterostylous. Calyx 1.5 mm, entire, above level of disc. Corolla tube 8 mm; with a ring of hairs below level of mouth; lobes narrow-triangular to 5 mm, unci to 2.5 mm. Anthers 1.5 mm, at mouth of tube. Pollen 3- (or 4-)colpate; 100–120 μm; colpi with large swollen borders to 20 μm across; brochi 1–2 μm. Stigma bifid, above anthers. <i>Fruit</i> undeveloped and pyrenes unknown.</p><p>Ecology & Habitat — In forest on trees or rockwalls, 100– 175 m. Apparently not inhabited by ants.</p><p>Distribution — Indonesia (Papua Province).</p><p>Conservation status — Vulnerable (VU) under criteria D2 with only three locations known. These locations are widespread (350 km) along the northern coastal plains of Papua Province.</p><p><i>Additional specimens examined</i>. <i>Kanehira & Hatusima 12293</i> (FU), Dalman, 45 km Inland from Nabire; <i>Docters van Leeuwen 10134</i> (A, K, L), S3°00' E138°00', Rouffaer (Tariku) river.</p><p>Note — This species has been difficult to place to a genus, chiefly because of its large intrapetiolar stipules, a character otherwise not known in <i>Hydnophytum</i>. The large inflorescences, pollen grains with thick bordered pores, a coarse reticulation, and large petiolate leaves are more like <i>Myrmecodia</i> (as suggested in Huxley & Jebb 1993), however, the tuber lacks the characteristic <i>Myrmecodia</i> -type cavity arrangement (Jebb 1985, 1991a), and the species is placed in <i>Hydnophytum</i> more by default than by diagnosis.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_16882927 |
| institution | Zenodo |
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| publishDate | 2019 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Hydnophytum mamberamoense Jebb & C. R. Huxley 2019, sp. nov. Jebb, M. H. P. Huxley, C. R. Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Gentianales Rubiaceae Hydnophytum Hydnophytum mamberamoense <p><b>45. <i>Hydnophytum mamberamoense</i> Jebb & C.R.Huxley, <i>sp. nov</i>. — Fig. 48</b></p><p><i>Myrmecodia</i> species 1 ‘ <i>mamberamoensis</i> ’ C.R.Huxley & Jebb (1993) 332.</p><p>Tuber oblongum, laeve. Aperturae 0.2–0.6 cm, labrosae, arcuatim vel seriatim dispositae. Caules complures; internodia fertilia 2–9 cm. Stipulae triangulares, ad 1.6 per 0.6 cm, papyraceae, mox caducae. Lamina ovatoelliptica, 19 per 9 ad 40 per 14 cm, apice acuto, basi cuneato-attenuata, nervis 12–19,coreacea textura.Petiolus 9 cm. Inflorescentia binata,sessilis, obtecta pulvino pilorum bractealium et plurimorum fructuum ineffectorum, omnio ad 3.5 cm in diametro, plus minus contigua, ad instar densae spirae caulem ascenditis; pili bracteales ad 1.3 cm, badii. Calyx 1.5 mm, integer, supra altitudinem disci. Corollae tubus 8 mm, annulo pilorum infra faucem instructus;lobi anguste triangulares,ad 5 mm, unci ad 2.5 mm.Antherae 1.5 mm, ad faucem tubi. Stigma bifidum, supra antheras.Fructus et pyrenae ignota.</p><p>— Typus: <i>Docters van Leeuwen 9540</i> (holo L; iso A, BO, K, SING), New Guinea, Papua Province, Mamberamo river opposite Albatros biv,July 1926.</p><p><i>Etymology</i>. For the type locality.</p><p><i>Tuber</i> oblong, 18 by 11 cm; smooth-surfaced. Entrance holes 0.2–0.6 cm, rimmed; often in arcs or lines. <i>Stems</i> several, unbranched? to 50+ by 1.5 cm; internodes 2–9 cm when fertile. Lamina ovate-elliptic; 19 by 9 to 40 by 14 cm; apex acute; base cuneate, ultimately attenuate; veins 12–19; leathery in texture. Petiole 9 cm; stipule intrapetiolar, triangular, to 1.6 by 0.6 cm, papery, soon falling. Inflorescence paired, sessile, covered by a mass of bract hairs, to 3.5 cm across; more or less contiguous, appearing as a thick spiral up stem. Bract hairs to 1.3 cm, reddish brown, with numerous undeveloped fruits. <i>Flowers</i> [1]?heterostylous. Calyx 1.5 mm, entire, above level of disc. Corolla tube 8 mm; with a ring of hairs below level of mouth; lobes narrow-triangular to 5 mm, unci to 2.5 mm. Anthers 1.5 mm, at mouth of tube. Pollen 3- (or 4-)colpate; 100–120 μm; colpi with large swollen borders to 20 μm across; brochi 1–2 μm. Stigma bifid, above anthers. <i>Fruit</i> undeveloped and pyrenes unknown.</p><p>Ecology & Habitat — In forest on trees or rockwalls, 100– 175 m. Apparently not inhabited by ants.</p><p>Distribution — Indonesia (Papua Province).</p><p>Conservation status — Vulnerable (VU) under criteria D2 with only three locations known. These locations are widespread (350 km) along the northern coastal plains of Papua Province.</p><p><i>Additional specimens examined</i>. <i>Kanehira & Hatusima 12293</i> (FU), Dalman, 45 km Inland from Nabire; <i>Docters van Leeuwen 10134</i> (A, K, L), S3°00' E138°00', Rouffaer (Tariku) river.</p><p>Note — This species has been difficult to place to a genus, chiefly because of its large intrapetiolar stipules, a character otherwise not known in <i>Hydnophytum</i>. The large inflorescences, pollen grains with thick bordered pores, a coarse reticulation, and large petiolate leaves are more like <i>Myrmecodia</i> (as suggested in Huxley & Jebb 1993), however, the tuber lacks the characteristic <i>Myrmecodia</i> -type cavity arrangement (Jebb 1985, 1991a), and the species is placed in <i>Hydnophytum</i> more by default than by diagnosis.</p> |
| title | Hydnophytum mamberamoense Jebb & C. R. Huxley 2019, sp. nov. |
| topic | Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Gentianales Rubiaceae Hydnophytum Hydnophytum mamberamoense |
| url | https://doi.org/10.5281/zenodo.16882927 |