Ipomoea parvibracteolata

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

343. Ipomoea parvibracteolata J.R.I. Wood & L.V. Vasconc., Kew Bull. 72 (8): 5. 2017. (Wood et al. 2017a: 5)

Type.

BRAZIL. Bahia, Casa Nova, estrada para a Fazenda Santarém, L.P. de Queiroz et al. 9615 (holotype HUEFS88992, isotype MBM).

Description.

Twining perennial herb reaching 3.5 m; stems slightly woody, glabrous. Leaves petiolate, 1-4 × 1-4 cm, ovate to suborbicular, abruptly narrowed to an acute or shortly acuminate apex, base cordate with rounded auricles, margin slightly undulate; abaxially paler; petioles 0.6-2 cm. Inflorescence of 1-3-flowered, axillary cymes; peduncles 2.2-8.5 cm, noticeably thicker than the secondary peduncles and pedicels; bracteoles 3 × 0.5 mm, somewhat scarious, caducous; secondary peduncles 0.8-2.5 cm; pedicels 1-3 cm long; sepals unequal, ovate or ovate elliptic, acute and mucronate, glabrous, outer 15-27 × 8-11 mm, dark green, prominently 5-ribbed, the ribs sometimes muricate; inner 12-18 × 6-8, pale green with scarious margins, the longitudinal veins many, the midvein terminating in a fine, fragile mucro; corolla 10-10.5 cm long. funnel-shaped, pink, glabrous; limb c. 9 cm diam., entire. Capsules enclosed by the persistent sepals, 13 × 7 mm, narrowly ovoid, muticous, glabrous; seeds 7 × 4 mm, blackish, minutely scabridulous.

Illustration.

Figures 11J , 164 .

Distribution.

Endemic to Brazil and apparently restricted to the area round Petrolina on the borders of Bahia and Pernambuco States in locations under the influence of the Rio São Francisco.

BRAZIL. Bahia: Barra, Ibiraba, L.P. de Queiroz 4888 (HUEFS); 40 km E de Ramanso, L.P. de Queiroz et al. 9675 (HUEFS); Pilão Arcado, L.P. de Queiroz et al. 14713 (HUEFS). Pernambuco: Arredores de Petrolina, E.P. Heringer et al. 80 (IPA, OXF); M.M. da Silva et al. 18 (HUEFS, K).

Note.

Obviously related to Ipomoea setifera , under which name it is usually identified, this species is distinguished by its very small leaves, very large corolla (and other flower parts) and the tiny, linear bracteoles.

• Species 344-347 comprise a distinct clade characterised by the very unequal sepals, which are transversally muricate.

Figures

Figure 11. Seeds of Ipomoea A I. peteri B I. murucoides C I. carolina D I. eggersiana E I. longibarbis (with and without marginal hairs) F I. clavata G I. violacea H I. acanthocarpa J I. parvibracteolata K I. meyeri L I. jujuyensis M I. cholulensis N I. minutiflora P I. tiliacea. A from Wallnoefer & Tut-Tesucun 9662; B from Pringle 6066; C from Gillis 12906; D from Urote 35; E from Killeen et al. 4199; F from Fuentes & Miranda 10895; G from Stearn 322; H from Wurdack & Monachino 39830; J from Silva et al. 18; K from Smith 1573; L from Rose et al. 23251; M from Hinton 11166; N from Stevens & Montiel 26592; P from Curtiss 249. Drawn by Rosemary Wise.

Figure 164. Ipomoea parvibracteolata. A habit B outer sepal C inner sepal D corolla opened up to show stamens E ovary and style F fruiting inflorescence with capsule G seed. Drawn by Rosemary Wise A from L. P. de Queiroz 4888; B-E, from L. P. de Queiroz et al. 9675; F, G from da Silva et al. 18.