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Conservatoire et Jardin botaniques de la Ville de Genève

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Monographia Aquifoliacearum - Loizeau Pierre-André & Gabrielle Barriera


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Aquifoliaceae of Neotropics

Loizeau P.-A. & G. Barriera


Ilex pernervata Cuatrec.

Habit, vegetative morphology.— Tree or shrub, evergreen, 2–12 m tall. Current year's branchlets glabrous. Branchlets older than one year smooth or furrowed or rough, greyish or brownish or reddish, glabrous. Lenticels on current year's branchlets present. Internodes 0.2–4.2 cm. Stipules caducous, linear-triangular, 0.9–1.5 mm. Petiole glabrous, smooth surface, 4–19 mm. Lamina elliptic or obovate, orbiculate (1:1) or oblong (1:2) or lanceolate (1:3), 3.5–15.5 X, 2.3–9.2 cm, papyraceous or coriaceous, glabrous abaxially or pubescent abaxially. Base cuneate or acute or obtuse or rounded. Apex rounded or obtuse, mucronate or not mucronate. Apex retuse or rounded. Margin plane or revolute, dentate, teeth inconspicuous or conspicuous. Teeth 15–30 ca., over the entire length of the margin or on the distal half of the margin. Midbrid adaxially impressed, glabrous or pubescent (quelques poils disséminés). Midbrid abaxially raised, glabrous. Secondary veins abaxially evident, 5–11 pairs. Tertiary veins abaxially evident. Ponctuation abaxiallly absent.

Inflorescences.— Solitary dichasium.

Male flowers.— Cymes of order 1–3. Peduncles pubescent. Peduncles of order 1 6–19 mm. Pherophylls of order 1 at 5–7 tenth from the base. Peduncles of order 2 1.5–6 mm. Pherophylls of order 2 at 0–4 tenth from the base. Peduncles of order 3 2–3 mm. Pherophylls of order 1 opposite or subopposite, deltoid or linear-triangular, pubescent, 0.8–3 mm, margin entire or margin ciliate. Male flowers 5–8 -merous, white. Calyx pubescent, 3.5–7 mm in diam., margin ciliate or dentate. Corolla 5–6.5 mm, petals connate on, petals 20–25 % of their length. Apex margin entire. Stamens at the anthesis shorter than corolla. Rudimentary ovary subglobulous or flattened, glabrous.

Female flowers.— Cymes of order 1–2. Peduncles glabrous. Peduncles of order 1 5–35 mm. Pherophylls of order 1 at 4–8 tenth of the base. Peduncles of order 2 2–10 mm. Pherophylls of order 2 at 0–5 tenth of the base. Pherophylls of order 1 opposite or subopposite, deltoids or linear-triangulate, glabrous, 0.5–2 mm, margin entire. Female flowers 5–8 -merous, white. Calyx glabrous or pubescent (très courtement), margin entire or margin ciliate or dentate (finement), 3–7 mm in diam. (jusqu'a 14 lorsque le fruit est a maturité). Corolla 3–5 mm, petals connate on, petals 25–40 % of their length. Apex margin entire (possibly beaded) (papilleuse). Staminodes sagittate, glabrous. Ovary spherical, glabrous, stigma mamillate (épais), stigma glabrous.

Fruits.— Fruit red (pourpre) or green, spherical or flattened, 7–20 mm in diam., 6–13 mm.

Distribution, ecology.— South America, Colombia Ecuador, 2000–3600 m, Páramo, tourbière de páramo, forêt andine, forêt nuageuse souvent perturbée.

Illustrations.— • Dessin: Cuatrecasas 17986 G femelle. • Planche Cuatrecasas 17986 G f (PT). • Rameau Cuatrecasas 17986 G f (PT). • Infrutescence Cuatrecasas 17986 G f (PT). • Fruits Cuatrecasas 17986 G f (PT).


Cite this publication as: ‘Loizeau, P.-A. & G. Barriera (2007). Aquifoliaceae néotropicales: Descriptions, Illustrations, Identification, et Recherche d'Information. Version: 1st march 2007. http://www.ville-ge.ch/cjb/.
Loizeau (1994) et Loizeau & Spichiger (1992) should also be cited (see Bibliography).