Ipomoea longistaminea O'Donell

Wood, John R. I., Munoz-Rodriguez, Pablo, Williams, Bethany R. M. & Scotland, Robert W., 2020, A foundation monograph of Ipomoea (Convolvulaceae) in the New World, PhytoKeys 143, pp. 1-823 : 1

154. Ipomoea longistaminea O'Donell , Lilloa 23: 488. 1950. ( O’Donell 1950b: 488)

Type.

BRAZIL. Bahia, Barrhiña, 7-8 June 1915, J.N. Rose & P.G. Russell 19784 (holotype US00111414, isotype NY).

Description.

Liana to 3 m; stems woody, white-canescent, peeling off to show glabrous pale brown under-bark. Leaves usually absent at anthesis, petiolate, 2-6 × 1.5-3.5 cm, ovate, base subtruncate with glands, apex often retuse, densely white-canescent on both surfaces; petioles 1.5-2.5 cm, white-canescent. Inflorescence of shortly pedunculate corymbose clusters; peduncles 0.4-4 cm, white-canescent, appearing branchlet-like; secondary peduncles 0.5-1 cm, pubescent; pedicels 6-18 mm, thinly pubescent, glabrescent; sepals subequal, coriaceous, convex, glabrous, outer 7-8 × 4 mm, elliptic, obtuse, inner obovate, 5 mm wide, rounded, margins scarious; corolla 3.7-4 cm long, suburceolate, deep pink, glabrous, limb reduced to short teeth, 3-4 mm long; stamens shortly exserted. Capsules ovoid 15 × 7 mm; seeds long white-pilose.

Illustration.

Figures 4H , 8J , 90 .

Distribution.

Endemic to NE Brazil, principally Bahia State growing in caatinga.

BRAZIL. Bahia: Mucugé, R.M. Harley & A.M. Guilietti 54044 (HUEFS, SP); Mun. Abaira, W. Ganev 3378 (HUEFS, K); Sobradinho, Rodavia Sobradinho-Santa Fe, L. Coradin et al. 5981 (CEN, K, MO); Rio de Contas, A.M. Guilietti et al. 2430 (HUEFS, K). Minas Gerais: Jaiba, Mocambinho Estrada para Jaiba, km 11, J.F.B. Pastore 2678 (HUEFS, OXF). Pernambuco: Afrânio, I.D. Pequeno 3 (HVASF).

Note.

A very distinctive species because of the suburceolate, tubular corolla with exserted stamens combined with the white-tomentose stem and leaf indumentum. Leaves are mostly absent at anthesis.

Figures

Figure 4. Sepals of Ipomoea species. A I. racemosa B I. rosea C I. alba D I. hirsutissima E I. barbatisepala F I. ampullacea G I. gigantea H I. longeramosa. Photographs of A (R. A. & E. S. Howard 8863) E (Gonzalez Ortega 874) and F (Lott & Wendt 2192) by John Wood; B (Harley et al. 54830); C (Fendler 589) and H (Pickersgill et al. RU 72 - 400) by John Baker; D (Mendoza 4365) and G (Mendoza 4645) by Moises Mendoza.

Figure 8. Corollas showing variations in form (side view), size, limb lobing and stamen exsertion. A Ipomoea argentea B I. repanda C I. neei D I. electrina E I. habeliana F I. santillanii G I. nationis H I. rubriflora J I. longistaminea K I. megapotamica L I. megalantha M I. neriifolia N I. syringifolia P I. ramosissima Q I. elongata R I. mucronatoproducta. A from Wood et al. 25639 and photo; B from Whitefoord 5244; C from Skutch 2043; D from Breedlove 27626; E from Bentley 203; F from Bourgeau 3024; G from Saunders 987; H from Wood et al. 27678; J from Pastore et al. 2678; K from Wood et al. 28060; L from Hassler 9114; M from Rezende et al. 1011; N from Stutz 1426 and photo; P from Bang 2246; Q from Purpus 3904; R from Wood & Villarroel 25474. Drawn by Rosemary Wise.

Figure 90. Ipomoea longistaminea. A habit B fertile branch C abaxial leaf surface D outer sepal E inner sepal F leafless inflorescence G corolla H capsule. Drawn by Rosemary Wise A-C from Guilietti 74866; D-F from Coradin et al. 5981; G, H from Pastore 2678.