Duguetia hadrantha (Diels) R.E.Fr.

  • Authority

    Maas, Paulus J. M., et al. 2003. (Annonaceae). Fl. Neotrop. Monogr. 88: 1-274 pp. (Published by NYBG Press)

  • Family

    Annonaceae

  • Scientific Name

    Duguetia hadrantha (Diels) R.E.Fr.

  • Type

    Type: Brazil. Acre: Rio Juruá-Mirim, Belem, Oct 1901 (fl), Ule 5794 (holotype, B; isotypes, F, G, K, L, MG).

  • Synonyms

    Aberemoa hadrantha Diels

  • Description

    Species Description - Shrub or tree, 1-15(-30) m tall, 2.5-10 cm in diam. Young twigs and petioles totally covered with stellate and entire scales 0.1-0.5 mm in diam. Petioles 3-6 mm long, 1-2 mm in diam. Lamina narrowly obovate to narrowly elliptic, 8-24 cm long, 3-8 cm wide, leaf index 2.8-3.5, chartaceous, grey to greyish green above, pale brown to pale greenish-brown below, glabrous above, sparsely to rather densely covered with brownish, stellate and subentire (the largest ones) scales 0.1-0.5 mm in diam. below, base acute, apex acuminate (acumen 5-25 mm long), primary vein impressed above, secondary veins curved, 10-11 on either side of primary vein, slightly raised above, but the whole zone impressed like the loops, angles with primary vein 7080°, loop-forming at right to obtuse angles, loops distinct, smallest distance between loops and margin 2-5 mm, tertiary veins slightly raised above. Inflorescences among leaves, leaf-opposed, supra-axillary, or subaxillary, a single rhipidium, or rarely plant cauliflorous with much branched (or densely aggregate?) inflorescences. Rhipidia mostly 1-flowered, to 5 flowers in succession (or more in cauliflory?). Indument: peduncles, pedicels, and outer side of bracts, sepals, and petals totally covered with brownish, stellate (the small ones) to subentire (the large ones) scales 0.1-0.5 mm in diam., inner side of sepals and petals totally covered with stellate hairs 0.1-0.5 mm in diam., inner 1/2 of inner petals glabrous. Peduncle 0-2 mm long, 2 mm in diam. Sympodial rachis to 5 mm long. Pedicels 5-8 mm long, 1-2 mm in diam., fruiting pedicels 10-20 mm long, distinctly grooved. Upper bract at 1/3 to 2/3 of the base of the pedicel, depressed ovate, ca. 2 mm long, caducous. Flower buds ovoid to very broadly ovoid. Flowers with greenish sepals and cream to yellow petals in vivo. Sepals connate for 10-25%, ovate-triangular, 15-20(-25) mm long, 10-14 mm wide, acute. Petals subequal, ovate-triangular, 30-40 mm long, 10-15 mm wide, obtuse to acute, inner base of inner petals callose, grooved. Stamens 2-2.1 mm long, yellow, apex of connective discoid, 0.4-0.5 x 1-1.1 mm, totally covered with simple hairs. Carpels ca. 5 mm long, ovary totally covered with stellate scales 0.1 mm in diam., stigma densely covered with stellate hairs. Fruit white to brownish white in vivo, subglobose, 2-4.5 cm in diam., basal collar absent or very indistinct, fertile carpels 35-50 (to 80 in S. F Smith et al. 1332), obovoid to obtrulloid, 6-12 mm long, 5-11 mm in diam., free, areoles broadly to depressed ovoid, 2-5 mm high, obtuse, apiculate (apicule 0.5-2 mm long), slightly ribbed, totally covered with stellate scales ca. 0.1 mm in diam. Seeds obovoid, 8-10 mm long, 5-7 mm in diam., obtuse to rounded, pale brown, slightly shiny.

  • Discussion

    Root and bark infusion is used for rheumatism and malaria, seed used in curare (Schunke V. 6402, 6527).

    Duguetia hadrantha looks morphologically closest to D. ulei, both having distinctly connate sepals. Fries (1934) noticed this relationship before when placing both species, together with D. obovata (= D. yeshidan), into Sect. Hadrantha. He stated: “D. hadrantha and D. ulei weisen so auffallende Übereinstimmung in Beschuppung, Aussehen der Blüte u.a. auf, dass sie zweifelsohne nahe miteinander verwandt sein müssen.” The main differences between D. hadrantha and D. ulei are found in the indument of leaves and sepals (stellate and subentire scales in the former, only stellate scales in the latter), and in the carpels which are densely hairy in the former, and glabrous in the latter). All three species are found in the cluster around D. calycina after UPGMA analysis (Fig. 37, 5th cluster).

  • Common Names

    Ayac vara, Espintana, Espintana negra, Tortuga amarilla, Tortuga caspi

  • Distribution

    Amazonian region from Colombia through Bolivia, and the Brazilian states of Acre and Mato Grosso. In non-inundated forest. At elevations from sea level to 950 m. Flowering throughout the year, fruiting between January and August.

    Colombia South America| Amazonas Colombia South America| Ecuador South America| Morona-Santiago Ecuador South America| Napo Ecuador South America| Pastaza Ecuador South America| Peru South America| Huánuco Peru South America| Loreto Peru South America| Madre de Dios Peru South America| San Martín Peru South America| Brazil South America| Acre Brazil South America| Mato Grosso Brazil South America| Bolivia South America| Pando Bolivia South America|