Jacquemontia boliviana J.R.I.Wood

Wood, J.R.I., Clegg, R. Jacquemontia (Convolvulaceae) in Bolivia and Peru. Kew Bull 76, 375–420 (2021). DOI: https://doi.org/10.1007/s12225-021-09936-5

Type

Bolivia: Inquisivi, Huayra Pata, 2 km NE of mouth of the Rio Aguilani at Lakachaka, 16°39'S 67°20'W, 2300 m, 18 Nov. 1991, Marko Lewis 40564 (holotype LPB; isotypes K, MO, OXF).

Morphology General Habit

Perennial vine; stems twining, somewhat woody, tomentose

Morphology Leaves

Leaves petiolate; lamina (1.5 –) 2.5 – 6 × (0.8 –) 1.5 – 4 cm, ovate, base shallowly cordate, apex shortly mucronate with caducous mucro or retuse, margin entire, both surfaces tomentose; petioles 1 – 1.9 cm, tomentose

Morphology Reproductive morphology Inflorescences

Inflorescence of usually shortly pedunculate, compact cymes; with 4 – 10 flowers, subcapitate in form; peduncles 3.5 – 6 (– 10) cm, tomentose; outer bracteoles very narrowly lanceolate, 3 – 6 × 1 – 2 mm, caducous, secondary peduncles 0 – 2 mm; bracteoles 3 – 4 mm long, linear-filiform, caducous; sepals unequal, 4 – 7 × 3 mm, somewhat accrescent in fruit, oblong-ovate to subrhomboid, acuminate, outer sepals abaxially tomentose, inner sepals scarious, glabrous apart from tomentose midrib area; corolla blue-purple or deep blue with darker, acute midpetaline bands, the exterior glabrous, c. 1.5 cm long; stamens included, filaments c. 5 mm long, glabrous, anthers oblong 1.2 – 1.5 mm; style 7 – 8 mm long, glabrous; stigma bilobed with 1 mm long elliptic lobes, ovary conical-Capsule rounded-ovoid, 5 – 6 × 4 mm, glabrous; seeds 2 × 1.5 mm, muricate. The inflorescence is subcapitate, the bracts deciduous, if present, and the bracteoles inconspicuous, although moderately persistent. The whole plant is densely tomentose, rather like Jacquemontia velutina.

Conservation

Based both on an area of occupancy 28,000 km2 and extent of occurrence of 139.448 km2 this species would be classified as Endangered (EN) using Criterion B. All collections were made in a very restricted area and most of the woodland has been cleared in the region so habitat quality is clearly in decline. On the positive side, this species seems to adapt well to disturbed bushy ground around fields in areas cleared of trees but always in the near vicinity of woodland relics.

Distribution

This species has a wide altitudinal range. Restricted to Inquisivi Province in La Paz Department growing on the margins of ‘Bosque Montano Subhúmedo de las Yungas’ and in secondary scrub from 1340 – 2500 m.