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Monographia Aquifoliacearum - Loizeau Pierre-André & Gabrielle Barriera


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Aquifoliaceae of Neotropics

Loizeau P.-A. & G. Barriera


Ilex dumosa v. guaranina Loes.

Habit, vegetative morphology.— Shrub, evergreen. Current year's branchlets pubescent (poils très courts). Branchlets older than one year smooth or furrowed, greyish or brownish, glabrous. Lenticels on current year's branchlets present. Internodes 2.5 cm. Stipules caducous, linear-triangular, 0.5 mm. Petiole pubescent (poils rares et très courts), smooth surface, (1–)4–7(–9) mm. Lamina elliptic to obovate, oblong (1:2) to lanceolate (1:3), (1–)3.5–6(–8.5) X, (0.4–)1–2(–3) cm, coriaceous, glabrous abaxially. Base cuneate to acute. Apex obtuse to acute, mucronate. Apex emarginate or rounded. Margin revolute, crenate to dentate, teeth conspicuous. Teeth 6–10 ca., over the entire length of the margin. Midbrid adaxially impressed to flat, glabrous or pubescent on proximal half. Midbrid abaxially raised, glabrous. Secondary veins abaxially obscure, 5–9 pairs. Tertiary veins abaxially evident. Ponctuation abaxiallly absent.

Inflorescences.— Thyrse or solitary dichasium, proliferating.

Male flowers.— Thyrses axes solitary and axillary. Thyrses axes 1–25 cm. Cymes of order 2–4. Peduncles pubescent (poils très courts). Peduncles of order 1 6–10 mm. Pherophylls of order 1 at 6–8 tenth from the base. Peduncles of order 2 2–3 mm. Pherophylls of order 2 at 0–1 tenth from the base. Peduncles of order 3 1–2 mm. Pherophylls of order 3 at 0–1 tenth from the base. Peduncles of order 4 1–2 mm. Pherophylls of order 4 at 0–1 tenth from base. Bracts deltoids, glabrous, 0.5 mm, margin entire. Pherophylls of order 1 opposite, linear-triangular, glabrous, 0.5 mm, margin entire. Male flowers 4–5 -merous, white. Calyx glabrous, 1–2 mm in diam., margin ciliate or dentate (très finement, visible à la loupe). Corolla 1–2 mm, petals connate on, petals 15–25 % of their length. Apex margin entire. Stamens at the anthesis shorter than corolla. Rudimentary ovary subglobulous or flattened, glabrous.

Female flowers.— Thyrses axes solitary and axillary. Thyrses axes 1–25 cm. Cymes of order 1–2. Peduncles pubescent (poils très courts). Peduncles of order 1 6–9 mm. Pherophylls of order 1 at 4–6 tenth of the base. Peduncles of order 2 2–3 mm. Pherophylls of order 2 at 0–1 tenth of the base. Bracts deltoids, glabrous, 0.5 mm, margin entire. Pherophylls of order 1 opposite, linear-triangulate, glabrous, 0.5 mm, margin entire. Female flowers 4 -merous, white. Calyx glabrous, margin ciliate or dentate (très finement, visible à la loupe), 2–2.5 mm in diam. Corolla 1–2 mm, petals connate on, petals 15–25 % of their length. Apex margin entire (possibly beaded). Staminodes sagittate, glabrous. Ovary spherical, glabrous, stigma capitate, stigma glabrous.

Fruits.— Fruit black, spherical, 4–7 mm in diam., 4–7 mm.

Distribution, ecology.— South America, Brazil (Minas Gerais) Paraguay (oriental) Argentina (Misiones, nordeste de Corrientes), 250 m, Pantanícola. Abunda en matorrales campestres, en la riberas de cursos de agua y en bosques abiertos. Raro en vegetación tipo cerrado.

Flowering.— January to May or September to December.

Vernacular name.— Ka'a ygapó (ka'a=yerba, ygapó=pantano); ka'a la niña; guaraniná (corruptela de yvyrá niná, un sinónimo de guajayví raí, nombre de Bumelia obtusifolia Roemer & Schultes.

Illustrations.— • Dessin in Giberti, G. C. (1994). Aquifoliaceae. Flora del Paraguay 24: 22.. • Planche Balansa 1792 BR f (ILT). • Etiquette Balansa 1792 BR f (ILT). • Rameau Balansa 1792 BR f (ILT). • Planche Balansa "1793"[1792] BR f (ILT). • Etiquette Balansa "1793"[1792] BR f (ILT). • Rameau Balansa "1793"[1792] BR f (ILT).


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).