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Monographia Aquifoliacearum - Loizeau Pierre-André & Gabrielle Barriera


Aquifoliaceae of Neotropics

Loizeau P.-A. & G. Barriera

Ilex retusa f. brunnescens Loes.

Habit, vegetative morphology.— Shrub, evergreen. Current year's branchlets pubescent (poils courts). Branchlets older than one year smooth or furrowed (paraissant rugueux à cause des restes de poils), brownish (clair), glabrous. Lenticels on current year's branchlets absent or hardly visible. Internodes 0.3–1 cm. Stipules caducous, linear-triangular, 0.3–0.5 mm. Petiole pubescent, rough or grooved surface, 2–5 mm. Lamina elliptic or obovate, orbiculate (1:1) or oblong (1:2), 1.7–4.7 X, 1.3–3.6 cm, coriaceous, glabrous abaxially. Base obtuse or rounded. Apex rounded, mucronate or not mucronate (tôt caduque). Apex retuse or rounded. Margin revolute, dentate, teeth conspicuous. Teeth 5–15 ca., on the distal half of the margin. Midbrid adaxially impressed or flat, pubescent on proximal half or pubescent (à poils très courts). Midbrid abaxially raised, glabrous. Secondary veins abaxially obscure, 3–6 pairs. Tertiary veins abaxially obscure (invisible). Ponctuation abaxiallly present.

Inflorescences.— Thyrse (rarement) or solitary dichasium, proliferating.

Male flowers.— Thyrses axes solitary and axillary or terminal. Thyrses axes 0.5–4.5 cm. Cymes of order 2–4 (4 rarement). Peduncles pubescent. Peduncles of order 1 4–8 mm. Pherophylls of order 1 at 7–10 tenth from the base. Peduncles of order 2 1–2 mm. Pherophylls of order 2 at 4–6 tenth from the base. Peduncles of order 3 1–2 mm. Pherophylls of order 3 at 0–3 tenth from the base. Bracts linear-triangular, pubescent, 0.5–0.8 mm, margin entire. Pherophylls of order 1 opposite, linear-triangular, glabrous, 0.5–1 mm, margin entire. Male flowers 4 -merous. Calyx pubescent, 2–2.5 mm in diam., margin ciliate or dentate. Corolla 2.5–3 mm, petals connate on, petals 25–30 % of their length. Apex margin entire. Stamens at the anthesis shorter than corolla. Rudimentary ovary subglobulous or flattened, glabrous.

Distribution, ecology.— South America, British Guyana.

Illustrations.— • Planche Schomburgk 1048 K m (HT). • Inflorescence Schomburgk 1048 K m (HT). • Inflorescence Schomburgk 1048 K m (HT). • Planche Schomburgk 1048 K m (HT). • Rameau et inflorescences Schomburgk 1048 K m (HT).

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