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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 costaricensis Donn. Sm.

Habit, vegetative morphology.— Tree, evergreen, 3–10 m tall. Current year's branchlets glabrous. Branchlets older than one year smooth or furrowed, greyish or brownish, glabrous. Lenticels on current year's branchlets present. Internodes 0.1–1.5 cm. Stipules caducous, linear-triangular, 0.1–0.5 mm. Petiole glabrous, smooth surface, 8–26 mm. Lamina elliptic, oblong (1:2), 3–6 X, 1–3 cm, coriaceous, glabrous abaxially. Base attenuate or obtuse. Apex obtuse or acute, mucronate. Apex acuminate. Acumen 0.6–0.8 cm. Margin revolute, entire. Midbrid adaxially impressed, glabrous. Midbrid abaxially raised, glabrous. Secondary veins abaxially evident, 6–8 pairs. Tertiary veins abaxially evident. Ponctuation abaxiallly absent.

Inflorescences.— Thyrse, proliferating.

Male flowers.— Thyrses axes solitary and axillary. Cymes of order 2–4. Peduncles glabrous. Peduncles of order 1 25–40 mm. Pherophylls of order 1 at 7–9 tenth from the base. Peduncles of order 2 3–10 mm. Pherophylls of order 2 at 5–6 tenth from the base. Peduncles of order 3 0.5–1 mm. Pherophylls of order 3 at 0–1 tenth from the base. Peduncles of order 4 0–0.1 mm. Pherophylls of order 1 opposite, deltoid, glabrous, 0.5–1 mm, margin entire. Male flowers 4(–5) -merous (à 5 selon Hahn 1999), white. Calyx glabrous, 1–2 mm in diam., margin entire. Corolla 2–2.5 mm, petals connate on, petals 10–20 % of their length. Apex margin entire. Stamens at the anthesis shorter than corolla. Rudimentary ovary pyramidal or subglobulous or flattened, glabrous.

Female flowers.— Thyrses axes solitary and axillary. Cymes of order 2–3. Peduncles glabrous. Peduncles of order 1 10–16 mm. Pherophylls of order 1 at 5–7 tenth of the base. Peduncles of order 2 3–6 mm. Pherophylls of order 2 at 0–2 tenth of the base. Peduncles of order 3 0–1 mm. Pherophylls of order 3 at 0–1 tenth of the base. Pherophylls of order 1 opposite, deltoids, glabrous, 0.3–0.6 mm, margin entire. Female flowers 4 -merous, white. Calyx glabrous, margin entire, 1–2.5 mm in diam.

Fruits.— Fruit red, spherical, 3–5 mm in diam., 3–5 mm.

Distribution, ecology.— Central America, Nicaragua or Costa Rica or Panama, 1350–1600 m, Forêt de nuages, Matagalpa.

Flowering.— June to August.

Illustrations.— • Planche Pittier 10483 M f (IT). • Rameau Pittier 10483 M f (IT). • Fruits Pittier 10483 M f (IT). • Planche Standley & Valerio 50582 K ? (IT d'Ilex valerioi Standl. ). • Inflorescence Standley & Valerio 50582 K m? (IT d'Ilex valerioi Standl. ). • Planche Pittier 10483 USat f (HT). • Planche Standley 50582 USat m? (HT de I. valerioi). • Planche Brenes 6226 NYat (IT de I. brenesii). • Planche Brenes 6639 NYat (IT de ramonensis).


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).