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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 holstii Steyerm.

Habit, vegetative morphology.— Tree (petit), evergreen, 4 m tall. Current year's branchlets glabrous. Branchlets older than one year smooth or furrowed, reddish, glabrous. Lenticels on current year's branchlets absent or hardly visible. Internodes 0.2–1.2 cm. Stipules caducous, linear-triangular, 0.3–0.5 mm. Petiole glabrous, smooth surface, 6–10 mm. Lamina elliptic, lanceolate (1:3), 5.5–8 X, 1.3–2.5 cm, papyraceous, glabrous abaxially. Base acute. Apex acute, mucronate. Apex acuminate. Acumen 0.5–1.2 cm. Margin revolute, entire. Midbrid adaxially impressed, glabrous. Midbrid abaxially raised, glabrous. Secondary veins abaxially evident, 6–8 pairs. Tertiary veins abaxially obscure. Ponctuation abaxiallly absent.

Inflorescences.— Thyrse, proliferating.

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

Fruits.— Fruit spherical, 4–6 mm in diam., 4–6 mm.

Distribution, ecology.— South America, Venezuela (Amazonas, Cerro Marahuaca), 1140 m, forêt de pente le long de la branche Est du Caño Negro.

Illustrations.— • Dessin in Berry & al. (1995). Flora of the Venezuelan Guayana. • Planche Steyermark 130481 U. • Infrutescence Steyermark 130481 U. • Planche Steyermark 130481 MO. • Etiquette Steyermark 130481 MO. • Feuille Steyermark 130481 MO. • Infrutescence Steyermark 130481 MO. • Rameau Steyermark 130481 MO.


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).