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  1. Dioscorea orbiculata var. orbiculata Node/Spm

    IUCN red list category LC (IUCN 2001). See Thapyai et al. (2005). Wilkin, P., Thapyai, C., Santsuk, T., Larsen, K., 2009. Dioscoreaceae Plant pubescent, indumentum present on all parts except inner whorl tepals, hairs usually dense on young shoots and inf ...

    Anna Haigh - 2014-05-29

  2. Dioscorea orbiculata var. tenuifolia Node/Spm

    to see in herbarium specimens. Usually all the partial inflorescences at a node are orientated above ... a line at right-angles through that node . Wilkin, P., Thapyai, C., Santsuk, T., Larsen, K., 2009. ...

    Anna Haigh - 2014-05-29

  3. Dioscorea alata Node/Spm

    as a membranous semi-circular or auriculate wing at each node ; cataphylls 6–10 by 2.5–4 mm, lanceolate to narrowly ...

    Anna Haigh - 2014-05-29

  4. Dioscorea arachidna Node/Spm

    Climber to 5 m. Tubers, a form where the spreading basal part is short) slender, spreading, to 5 mm in diam., cylindric to clavate, with thickened globose to subglobose apices 5–8 cm in diam., annually replaced. Indumentum present in some races as simple ...

    Anna Haigh - 2014-05-29

  5. Dioscorea birmanica Node/Spm

    with a cymule of 1–3 flowers at each node ; female inflorescences simple, spicate, 1 per axil. Male flowers ...

    Anna Haigh - 2014-05-29

  6. Dioscorea brevipetiolata Node/Spm

    Climber to 5 m. Tubers 1 per growing season, with withering tuber of previous season, 10–15 by 1.6–3 cm, cylindric to clavate, deeply vertically buried. Indumentum present at least on older stems as fine tuberculae giving a rough texture. Stems 0.5–4 mm i ...

    Anna Haigh - 2014-05-29

  7. Dioscorea bulbifera Node/Spm

    Climber of variable habit to at least 25 m. Tubers solitary, c. 10–20 by 5– 15 cm, variable in shape, usually globose to cylindric, sometimes digitate or irregularly lobed, shallowly buried, annually replaced, sometimes absent. Indumentum absent. Stems 15 ...

    Anna Haigh - 2014-05-29

  8. Dioscorea calcicola Node/Spm

    Climber to 6 m. Underground parts unknown. Indumentum absent except for simple hairs on very young shoots and a waxy pale green to white coating on leaf lower surfaces and immature capsules. Stems 1–3.5 mm in diam., twining to the right, annual, unarmed, ...

    Anna Haigh - 2014-05-29

  9. Dioscorea cirrhosa Node/Spm

    Large forest climber to at least 20 m. Tubers solitary 10–15 by 1–2.5 cm, cylindric to clavate, perennially replaced. Indumentum absent. Stems perennial, to 6.5 mm in diam. toward base, woody and densely spiny, usually unarmed distally, terete. Leaves sim ...

    Anna Haigh - 2014-05-29

  10. Dioscorea collettii Node/Spm

    Climber to 3 m. Rhizome, richly and irregularly branched and lobed, approximately 5.5–16.5 by 0.8–2 cm, shallowly buried, periderm not hard and lacking rigid, spine-like roots. Indumentum present as papillae, 0.1–0.6 mm long, usually on veins of leaf lowe ...

    Anna Haigh - 2014-05-29

  11. Dioscorea craibiana Node/Spm

    saucer-shaped torus, free; male inflorescences compound, 1–2 per axil; partial inflorescences 1–2 per node ...

    Anna Haigh - 2014-05-29

  12. Dioscorea daunea Node/Spm

    Robust climber to 25 m in height. Tubers often 2–3 together, with withering tubers of previous season, 5–12 by 1.5–3.2 cm, cylindric to clavate, annually replaced, vertically oriented. Indumentum absent. Stems 2.5–7 mm in diam., twining to the left, annua ...

    Anna Haigh - 2014-05-29

  13. Dioscorea decipiens Node/Spm

    Climber to 12 m. Tubers one per growing season, often with withering tuber of previous season, c. 5–20(–30) by 0.5–1.5 cm long, cylindric to clavate, vertically oriented. Indumentum usually present on all parts, simple hairs, 0.2–0.35 mm long, but often g ...

    Anna Haigh - 2014-05-29

  14. Dioscorea depauperata Node/Spm

    Climber to 4 m. Tubers one per growing season, often with withering tuber of previous season, 13–15 by 0.6–1 cm, cylindric, deeply vertically buried, subtended by a woody crown. Indumentum absent. Stems 1.5–2.5 mm in diam., twining to the right, annual, u ...

    Anna Haigh - 2014-05-29

  15. Dioscorea esculenta Node/Spm

    Climber to 10 m. Tubers (1–)2–5(–20), c. 12–15 by 16–20 cm, usually digitate, ovate or globose in cultivated plants, but often cylindric to irregularly lobed in wild forms, annually to perennially replaced, shallowly buried, crown bearing thicker roots an ...

    Anna Haigh - 2014-05-29

  16. Dioscorea filiformis Node/Spm

    Climber to 15 m. Tubers one per growing season, often with withering tuber of previous season, narrowly cylindric, deeply vertically buried. Indumentum absent. Stems 2.5–6 mm in diam., twining to the right, annual, toward base not seen, unarmed on upper s ...

    Anna Haigh - 2014-05-29

  17. Dioscorea garrettii Node/Spm

    produced on one side of the same node , blade narrowly ovate to ovate or ovate-deltoid, chartaceous ...

    Anna Haigh - 2014-05-29

  18. Dioscorea glabra Node/Spm

    Variable climber to 25 m. Tubers 3–5(–10), to 50 cm long and 3–5 cm in diam. (towards apex), annually replaced, narrowly cylindric with a globose to clavate apex, subtended by a woody crown, parenchyma largely fibrous. Indumentum absent except for the pub ...

    Anna Haigh - 2014-05-29

  19. Dioscorea gracilipes Node/Spm

    Climber to 5 m. Underground parts unknown. Indumentum absent. Stems 1–2.5 in diam., twining to the right, annual, terete, toward base woody and spiny, unarmed on the distal stems. Leaves simple, opposite, blade narrowly lanceolate to lanceolate-oblong, ch ...

    Anna Haigh - 2014-05-29

  20. Dioscorea hamiltonii Node/Spm

    Climber to at least 10 m. Tubers one per growing season, often with withering tuber of previous season, c. 0.4–1 by 7.5–12 cm, cylindric to clavate, vertically oriented, subtended by a woody crown. Indumentum sometimes present on young inflorescences, axe ...

    Anna Haigh - 2014-05-29

  21. Dioscorea hispida Node/Spm

    Robust climber to 20 m. Tubers in dense clusters of 3–5, subtended by a small, globose woody crown, each tuber c. 9–25 by 6–20 cm, annually to perennially replaced, usually clavate or ovate to globose, shallowly buried. Indumentum usually present on all p ...

    Anna Haigh - 2014-05-29

  22. Dioscorea inopinata Node/Spm

    Climber to 4 m. Underground parts unknown. Indumentum absent. Stems 1– 3 mm in diam. towards base, twining to the right, annual, unarmed, terete with shallow longitudinal ridges. Leaves simple, alternate, blade ovate to narrowly ovate, chartaceous, 5–7-ve ...

    Anna Haigh - 2014-05-29

  23. Dioscorea kamoonensis Node/Spm

    Climber to 3 m. Tubers one per growing season, often with withering tuber of previous season, 2.5–3 by 1.6–2 cm, ovoid to globose, shallowly buried. Indumentum present on all parts except inner tepal whorl, especially dense on young shoots and inflorescen ...

    Anna Haigh - 2014-05-29

  24. Dioscorea kerrii Node/Spm

    Climber to 3 m. Tubers incompletely known, probably annually replaced, slender, possibly spreading, cylindric, with clavate thickened apices (c. 3.5 by 0.25 cm piece present on type), crown small, ovoid. Indumentum present on all parts except tepals, dens ...

    Anna Haigh - 2014-05-29

  25. Dioscorea kratica Node/Spm

    Climber to at least 7 m. Tuber “long, going deep into the soil” (Prain & Burkill 1938). Indumentum absent. Stem base unknown, upper stems 2–5 mm in diam., twining to the right, annual, unarmed, terete. Leaves simple, opposite, sometimes subopposite, e ...

    Anna Haigh - 2014-05-29

  26. Dioscorea laurifolia Node/Spm

    Climber to 10 m. Tubers (according to Burkill 1951) “1 or perhaps 2, descending into the soil but not very deeply”. Indumentum absent. Stem bases probably perennial, woody, sometimes spiny, upper stems 1.5–3.5 mm in diam., spines lax to unarmed, terete. L ...

    Anna Haigh - 2014-05-29

  27. Dioscorea membranacea Node/Spm

    absent; lateral nodal spines usually present on either side of each node , sometimes absent (especially ... 2.2–25 mm long, axes 4–33.5 cm long, with an apparently sessile cymule of (1–)2–3 flowers at each node ...

    Anna Haigh - 2014-05-29

  28. Dioscorea orbiculata Node/Spm

    Climber to 10 m. Underground parts (according to Burkill 1951) “tuberous, with several tubers produced each year at the end of long spreading or descending stalks”, crown woody. Indumentum present or absent, hairs simple, stellate, or dendroid, 0.15–0.35 ...

    Anna Haigh - 2014-05-29

  29. Dioscorea oryzetorum Node/Spm

    near the nodes in herbarium specimens. Leaves simple, opposite, blades narrowly lanceolate ...

    Anna Haigh - 2014-05-29

  30. Dioscorea paradoxa Node/Spm

    Climber to 5 m. Tubers up to about six per plant at any one time, to 40 cm long, c. 0.5 cm in diam. at the apex and to c. 12 cm at the widest point, clavate to pyriform, each one annually replaced, subtended by a vertically oriented, ovoid woody crown. In ...

    Anna Haigh - 2014-05-29

  31. Dioscorea pentaphylla Node/Spm

    Variable climber to at least 20 m in dense forest, often much smaller. Tubers 2–3(–5), usually one or two per growing season plus withering tuber(s) from previous season, c. 14–20 by 5–8.5 cm, variable in shape but usually cylindric to clavate, sometimes ...

    Anna Haigh - 2014-05-29

  32. Dioscorea petelotii Node/Spm

    flanges at each swollen stem node , upper stems with few spines or unarmed except paired lateral nodal ... long, straight to recurved, on either side of each node ; bulbils and cataphylls absent. Inflorescences ... per axil, with cymules of 1–3 flowers at each node , peduncles 1.2–5.3 cm long, axes 2.3–16(–25) cm ...

    Anna Haigh - 2014-05-29

  33. Dioscorea pierrei Node/Spm

    Robust climber to 15 m. Tubers, 1 per growing season, often with withering tuber of previous season, 30–35 by 3.3–4.5 cm, cylindric to clavate, vertically oriented. Indumentum present on all parts except inner whorl male tepals, hairs simple, 0.25– 1.8 mm ...

    Anna Haigh - 2014-05-29

  34. Dioscorea prazeri Node/Spm

    at each node , peduncles 1.5–35 mm long, axes 2–19.5 cm long, sometimes negatively geotropic; female ...

    Anna Haigh - 2014-05-29

  35. Dioscorea pseudonitens Node/Spm

    of (1–)2–3 flowers on a short branch at each node , peduncles 1–4.2 cm long, axes 2.5–10 cm long, often weakly ...

    Anna Haigh - 2014-05-29

  36. Dioscorea pseudotomentosa Node/Spm

    Slender climber to 4 m. Tubers 3–6, to at least 20 cm long, annually replaced, slender, c. 5 mm in diam., cylindric, spreading, often branched, some branches and possibly apices swollen, 1.5–2.2 by 1.3–2 cm, ovoid to globose. Indumentum present on all par ...

    Anna Haigh - 2014-05-29

  37. Dioscorea pyrifolia Node/Spm

    Climber to at least 10 m. Tubers 3–7, slender, c. 5 mm in diam., cylindric, spreading, to at least 50 cm long, annually replaced, apices approximately 3–5 cm in diam., globose to ovoid; subtended by a woody crown. Indumentum usually present on vegetative ...

    Anna Haigh - 2014-05-29

  38. Dioscorea rockii Node/Spm

    usually compound, 1(–2) per axil, partial inflorescences 1 per node , racemose with a cymule of 1–3 flowers ... on a short branch at each node , peduncles 0.3–2 cm long, axes 2–10 cm long; female inflorescences simple, ...

    Anna Haigh - 2014-05-29

  39. Dioscorea scortechinii Node/Spm

    Large forest climber to 10(–25) m. Tuber one, sometimes with withering tuber from previous season, dimensions similar to D. pentaphylla, cylindric to pyriform, annually replaced, vertically oriented, subtended by a woody crown. Indumentum present on all p ...

    Anna Haigh - 2014-05-29

  40. Dioscorea stemonoides Node/Spm

    Climber to 3 m. Tubers 4–10, subtended by a woody crown, cylindric, to 20 cm long, c. 5 mm in diam., spreading to vertically oriented, annually replaced, apices 2–6.5 by 1–3.1 cm, clavate to globose. Indumentum absent. Stems 1.5–2.5 mm in diam., twining t ...

    Anna Haigh - 2014-05-29

  41. Dioscorea tamarisciflora Node/Spm

    Climber to 5 m. Tubers 1–2, 7–20 by 1–2 cm, cylindric to clavate, vertically oriented, possessing a dark epidermis bearing dense roots, appearing to be branched, annually replaced, subtended by a small woody crown. Indumentum present on all parts except i ...

    Anna Haigh - 2014-05-29

  42. Dioscorea tentaculigera Node/Spm

    Climber to 4 m. Tubers 15–20 by 0.5–1.5 cm, one per growing season, often with withering tuber of previous season, narrowly cylindric, vertically oriented. Indumentum present as fine aculeolate projections on inflorescence axes, sometimes also on floral b ...

    Anna Haigh - 2014-05-29

  43. Dioscorea velutipes Node/Spm

    3 flowers at each node , peduncles 0.5–2.1 cm long, axes 5–12.5 cm long; female inflorescences spicate, ...

    Anna Haigh - 2014-05-29

  44. Dioscorea wallichii Node/Spm

    Large forest climber to at least 20 m. Tubers one per growing season, often present alongside withering tuber of previous season, 10–55 by 3–6 cm, clavate to cylindricclavate, vertically oriented, towards narrower base fibrous and pink or yellow, white an ...

    Anna Haigh - 2014-05-29

  45. Dioscorea decaryana (Classification) Node/Spm

    falcate on the internodes, ovate to oblong with an acute to retuse apex at the nodes , appearing ... region), ridged and angled, nodes moderately lax, floral bracts on very short branches terminating each ...

    Tiana - 2013-05-28

  46. Dioscorea tsaratananensis (Classification) Node/Spm

    nodes bearing roots, crown woody and growing to 10 – 20 cm in diam. according to Burkill & Perrier ... on pedicels and torus, especially in bud, and around the nodes , especially on younger tissues, more densely ... of Burkill (1960) present on either side of node at amplexicaul petiole base, 2 – 3 mm long. Inflorescences ...

    Tiana - 2013-05-27

  47. Dioscorea trichantha (Classification) Node/Spm

    node , not always visible in dried material; cataphylls occasionally present, possibly more frequent ... at each node , each with 1 (– 2) flowers open at once, peduncle 3 – 27 mm long, purplish at base, axis 30 ...

    Tiana - 2013-05-27

  48. Dioscorea sterilis (Classification) Node/Spm

    at each node comprising a basal sterile flower and 2 – 5 fertile flowers, one or two flowers per cymule ... at each node ; floral bract 2.8 – 4.9 × 0.9 – 1.3 mm, otherwise as male cymule bracts, bracteole (1.5–)1.8 ...

    Tiana - 2013-05-27

  49. Dioscorea seriflora (Classification) Node/Spm

    or branched, periderm pale brown to pink-hued or white, parenchyma white. Indumentum present around nodes ... and flattened towards base, in fertile part winged between each node , flowers solitary. Female inflorescences ...

    Tiana - 2013-05-24

  50. Dioscorea sansibarensis (Classification) Node/Spm

    Tubers vertical, ovoid, brown epiderm. Stems in left twining direction, terete, lateral nodal organ in pair fleshy. Gablrous, with cataphyls. Leaves opposite, obovate or cordate, papery, deeply lobed at the base (cordate), acuminate in apex, more than 9 p ...

    Tiana - 2013-05-24

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith