1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus prolificus Hett. & A.Galloway

        This species is accepted, and its native range is Central Thailand.

    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    Distribution

    Central Thailand. Endemic.

    Only known from the type locality.

    General Description

    Tuber globose, 2–3.5 × 1.8–3 cm, smooth, producing annual, large, globose to fusiform offsets, these 1.5–2.2 × 2.3–3 cm, remaining attached to the main tuber. Leaf solitary; petiole 15–35 cm × 4–8 mm, smooth, uniformly greyish purple or dirty dark olive-green; leaf blade 16–40 cm, rachises winged distally from the basal branchings, segments moderately divided; leaflets obovate to elongate-obovate or elongate-elliptic, 7–18 × 4.3–7.5 cm, apex acute, adaxially green; peduncle 20 cm × 5 mm, smooth, uniformly dark greyish brown; spathe erect, not separated in base and limb, transversely elliptic, 5 × 8 cm, apex hardly distinguishable, very broadly acute, margin strongly concave, exterior white with a greenish flush, base slightly greener, interior pale green, base with a very indistinct, very pale purplish flush, base within densely set with shallow, irregular warts; spadix longer than spathe, sessile, 10.5 cm long; pistillate flower zone cylindrical, 7 × 8 mm, flowers distant and in distinct pockets sunken in the spadix axis; ovary subglobose, 1.5 × 1.8 mm, pale green; style short, 0.5 × 1 mm, pale green; stigma large, depressed, entire, 2–2.5 mm, verruculate, white; staminate flower zone cylindrical, base slightly constricted, 3 × 1 cm, flowers congested but in the lower part slightly separated in smaller and larger multi–staminate groups; lower staminate flowers (2–)5–ca.10-androus, upper flowers seemingly consisting of ever more stamens and then turning into a continuous zone; stamens 1 × 1 mm; filaments 1 mm long, off-white, free; anthers 0.8 mm long, truncate, off-white; appendix elongate-conical, 6–8 × ca 13 mm near the base, basal part slightly laterally compressed, apex acute, surface smooth, very shallowly rugulose. Fruit unknown.

    Tuber globose, 2-3.5 cm in diam., 1.8-3 cm in height, smooth, pale to mid-brown, producing annual, large, globose to fusiform offsets, these 1.5-2.2 cm in diam., 2.3-3 cm long, remaining attached to the main tuber. Petiole 15-35 cm long, 4-8 mm in diam., smooth, uniformly greyish purple or dirty dark olive-green; lamina 16-40 cm in diam., rachises winged distal from the basal branchings, segments moderately divided; leaflets obovate to elongate obovate or elongate-elliptic, 7- 18 cm long, 4.3-7.5 cm in diam., apex acute, upper surface green. Peduncle 20 cm long, 0.5 cm in diam., smooth, uniformly dark greyish brown; spathe erect, not separated in base and limb, transversely elliptical, 5 cm long, 8 cm wide, apex hardly distinguishable, very broadly acute, margin strongly concave, outside white with a greenish flush, base slightly greener, inside pale green, base with a very indistinct very pale purplish flush, base within densely set with shallow, irregular warts. Spadix longer than spathe, sessile, 10.5 cm long; female zone cylindric, 7 mm long, 8 mm in diam., flowers distant and in distinct pockets sunk in the spadix axis; male zone cylindric, base slightly constricted, 3 cm long, 1 cm in diam., flowers congested but in the lower part slightly separated in smaller and larger multi-staminate groups; appendix elongate conical, 6.8 cm long, 13 mm in diam. near the base, basal part slightly laterally compressed, apex acute, surface smooth, very shallowly rugulose, emitting a strong smell of oligomethyl-oligosulphides. Ovary subglobose, 1.5 mm high, 1.8 mm in diam., unilocular, pale green; sty le short, 0.5 mm long, 1 mm in diam., pale green; stigma large, depressed, entire, 2-2.5 mm in diam., verruculate, white. Lower male flowers consisting of (2-)5- ca. 10 stamens, upper flowers seemingly consisting of ever more stamens and then turning into a continuous zone; stamens 1 mm long, 1 mm in diam.; filaments 1 mm long, off-white, free; anthers 0.8 mm long, truncated, off-white, pores apical and fused to form one central pore per anther. Pollen psilate.

    Habitat

    Not recorded.

    Distribution

    Native to:

    Thailand

    Amorphophallus prolificus Hett. & A.Galloway appears in other Kew resources:

    First published in Aroideana 29: 69 (2006)

    Accepted by

    • Boyce, P.C., Sookchaloem, D., Hetterscheid, W.L.A., Gusman, G., Jacobsen, N., Idei, T. & Nguyen, V.D. (2012). Flora of Thailand 11(2): 101-325. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    Sources

    CATE Araceae
    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0