- treelet with glabrous, narrow elliptic leaves
- bulbous twig expansions next to petiole
- tubuler, lavender-blue flowers
- small white berries
Description: Treelet, reproductive at 1.5-3 m; twigs smooth, pale brown with few lenticels, glabrous, petiole insertion with a pair of distinct bulb-shaped appendages; leaves solitary, petioles to 2 cm, U-shaped, with a shallow channel, blades to 4.5 x 13 cm, elliptic, acute, base obtuse, margin unevenly undulate, midvein strongly keeled above, expressed below, lateral veins 5-6, basal pair strongly ascending, middle two pairs minutely keeled above, those at base and apex flat, blade glabrous, soft and somewhat fleshy; inflorescence axillary to distal leaves and terminal, 1-3 cm, glabrous, green, appearing racemose or with very short lateral branches, bearing 3-10 flowers, the leaves diminishing in size to bracts near inflorescence apex; flowers with pedicel 1 mm, distinct and uniform, calyx 3.5-4 mm, including 5 short triangular lobes about 0.8 mm, glabrous or with sparse scale-like hairs at apex of lobes inside, corolla tube 18-20 mm, pale purple white, glabrous, lobes 5, 4-4.5 mm, slightly recurved at anthesis, lavender purple, often darker in center of each lobe, outside glabrous in center, margins pappilose, not infolded, glabrous inside, stamens 5, filaments free for 4.5-5.5 mm, a small tooth less than 1 mm above insertion, the tooth pubescent, filament tracks sparse pubescent from insertion to corolla base, ovary globose, apex feintly 4-lobed, pale green, translucent yellow nectar disk at base, style 17-19 mm, white, short pubescent in distal 1/5, mild sweet fragrance; fruit a small spongy, white berry.
Local distribution: High peaks and ridges from 1550 to 1800 m (Cerro Amigos, Cerro Chomogo, Cerro Sin Nombre, La Ventana, Brillante Trail, Reserva Santa Elena).
Species range: Costa Rica
Habitat: Open understory, light gaps, forest edge, and sunny trails in forest.
Phenology: Flower: jan, mar-may, jul, oct. Fruit: sep, feb.
Seed dispersers: Birds
Comments: This may actually be an undescribed species related to Cestrum irazuense.