Hydnophytum spathulatum Valeton
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| author | Jebb, M. H. P. Huxley, C. R. |
| author_facet | Jebb, M. H. P. Huxley, C. R. |
| contents | <p><b>5. <i>Hydnophytum spathulatum</i> Valeton — Fig. 6; Map 1</b></p><p><i>Hydnophytum spathulatum</i> Valeton (1912a) t. 340. — Type: <i>Smith s.n.</i> (lectotype selected here <i>BO 1360 ­ 120;</i> iso <i>BO 1360­119</i>), Moluccas, Batjan Is, 2 Sept. 1900.</p><p><i>Tuber</i> oblong to conical, to 25 by 10 cm, ridged, smooth or rough; spines unbranched, flexible, root-like or recurved, on ridges; entrance holes numerous. <i>Stems</i> several, arising from a large area around tuber apex, to 50 by 0.4 cm, little branched; internodes 1–5 by 0.1–0.3 cm, terete; spines rarely present at nodes. Lamina spathulate, 3 by 1.8 to 5.5 by 2.5 cm; apex rounded, base attenuate; leathery to thin; midrib not prominent, veins obscure. Petiole 0–0.5 cm, stipules c. 0.1 cm, soon falling. Inflorescence a mass of tightly grouped sockets forming a prominent swelling at each node; bracts small, papery. <i>Flowers</i> [2]?heterostylous. Calyx c. 0.2 mm. Corolla tube to 2.5 mm; lobes 1–1.5 mm; with a broad band of short hairs at level of anthers at mouth of tube. Anthers 1 mm, at mouth of tube. Pollen 3-porate, 53 (50–57) µm, brochi <1 µm across; vesicles prominent. Stigma bifid, exserted. <i>Fruit</i> globose, red. Pyrenes obovoid, 3.5 by 1.5 mm; the flattened surface adpressed to the other pyrene c. 2.8 mm long, the rounded-acute apex projecting freely away from the other pyrene.</p><p>Ecology & Habitat — Forest, from sea level to 300 m. Tuber inhabited by ants.</p><p>Distribution — Indonesia, Maluku Province.</p><p>Conservation status — Vulnerable (VU) under criteria D2. Known from four collections, one from each island in the north Moluccas. Since EOO and AOO measures are inappropriate, criteria D2 is utilised.</p><p>Notes — The inflorescence of this species is similar to that of <i>H. ovatum</i> [4], although the leaves are very different and it is more widely distributed in the north Moluccas.</p><p>The specimen <i>De Vogel 4130</i> from Obi Island is placed here with reservation. The leaves are lanceolate and finely attenuated at each end, reaching 10 by 1.5 cm.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_16878069 |
| institution | Zenodo |
| language | |
| publishDate | 2019 |
| publisher | Zenodo |
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| spellingShingle | Hydnophytum spathulatum Valeton Jebb, M. H. P. Huxley, C. R. Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Gentianales Rubiaceae Hydnophytum Hydnophytum spathulatum <p><b>5. <i>Hydnophytum spathulatum</i> Valeton — Fig. 6; Map 1</b></p><p><i>Hydnophytum spathulatum</i> Valeton (1912a) t. 340. — Type: <i>Smith s.n.</i> (lectotype selected here <i>BO 1360 ­ 120;</i> iso <i>BO 1360­119</i>), Moluccas, Batjan Is, 2 Sept. 1900.</p><p><i>Tuber</i> oblong to conical, to 25 by 10 cm, ridged, smooth or rough; spines unbranched, flexible, root-like or recurved, on ridges; entrance holes numerous. <i>Stems</i> several, arising from a large area around tuber apex, to 50 by 0.4 cm, little branched; internodes 1–5 by 0.1–0.3 cm, terete; spines rarely present at nodes. Lamina spathulate, 3 by 1.8 to 5.5 by 2.5 cm; apex rounded, base attenuate; leathery to thin; midrib not prominent, veins obscure. Petiole 0–0.5 cm, stipules c. 0.1 cm, soon falling. Inflorescence a mass of tightly grouped sockets forming a prominent swelling at each node; bracts small, papery. <i>Flowers</i> [2]?heterostylous. Calyx c. 0.2 mm. Corolla tube to 2.5 mm; lobes 1–1.5 mm; with a broad band of short hairs at level of anthers at mouth of tube. Anthers 1 mm, at mouth of tube. Pollen 3-porate, 53 (50–57) µm, brochi <1 µm across; vesicles prominent. Stigma bifid, exserted. <i>Fruit</i> globose, red. Pyrenes obovoid, 3.5 by 1.5 mm; the flattened surface adpressed to the other pyrene c. 2.8 mm long, the rounded-acute apex projecting freely away from the other pyrene.</p><p>Ecology & Habitat — Forest, from sea level to 300 m. Tuber inhabited by ants.</p><p>Distribution — Indonesia, Maluku Province.</p><p>Conservation status — Vulnerable (VU) under criteria D2. Known from four collections, one from each island in the north Moluccas. Since EOO and AOO measures are inappropriate, criteria D2 is utilised.</p><p>Notes — The inflorescence of this species is similar to that of <i>H. ovatum</i> [4], although the leaves are very different and it is more widely distributed in the north Moluccas.</p><p>The specimen <i>De Vogel 4130</i> from Obi Island is placed here with reservation. The leaves are lanceolate and finely attenuated at each end, reaching 10 by 1.5 cm.</p> |
| title | Hydnophytum spathulatum Valeton |
| topic | Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Gentianales Rubiaceae Hydnophytum Hydnophytum spathulatum |
| url | https://doi.org/10.5281/zenodo.16878069 |