Ocotea nervosa Kosterm.

Werff, Henk Van Der, 2013, A revision of the genus Ocotea Aubl. (Lauraceae) in Madagascar and the Comoro Islands, Adansonia (3) 35 (2), pp. 235-279: 262-263

publication ID

http://doi.org/ 10.5252/a2013n2a5

persistent identifier

http://treatment.plazi.org/id/C71C7428-FFFF-FFD6-F646-64BAFE67C9E8

treatment provided by

Carolina

scientific name

Ocotea nervosa Kosterm.
status

 

24. Ocotea nervosa Kosterm.   ( Fig. 10 View FIG )

Notulae systematicae 8: 80 (1939)   . — Typus: Madagascar, Vondrozo , Farafangana, 1.IX.1926, fr., Decary 4914 (holo-, P[ P00541635]!; iso-, P[ P00541634]!).

SELECTED SPECIMENS SEEN. — Fianantsaroa, Ampamaherana, Service Forestier 3184 (MO, P[P01955960], TEF); Fianarantsoa, Parc national de Ranomafana, Rakoto & Turk 104 (MO, P[P01955965], TAN); Fianarantsoa, Ranomafana National Park, near village of Miaranomy, Anosimasina, Malcomber et al. 1604 (MO, P[P01955963], TAN).

DISTRIBUTION. — Ocotea nervosa   has been collected on the eastern escarpment from Vatomandry to Farafangana between 600 and 1350 m altitude.

PHENOLOGY. — Flowers: August; fruits: December, March, June.

VERNACULAR NAMES. — Varongy, varongy mainty, varongy fotsy, taforona, varongyvaza.

DESCRIPTION

Tree, to 20 m. Twigs angular, finely appressed pubescent with whitish hairs, quickly becoming glabrous; terminal buds densely appressed pubescent. Leaves alternate, firmly chartaceous, elliptic or broadly elliptic, 7-21 × 5-11 cm, glabrous, base acute or obtuse, apex obtuse or acute, lateral veins 6-9, not very strongly developed, arching upwards near the margin, midrib and lateral veins raised, tertiary venation forming a lax reticulum on both surfaces, domatia absent. Petioles glabrous 1.2-1.5 cm long. Inflorescences axillary along leafless short shoots, pubescent, 3-8 cm long, cymose-paniculate. Flowers 5-6 mm in diameter, the tepals half-erect. Tepals 6, equal, sparsely appressed pubescent on outer surface, the inner surface more densely pubescent, 2 mm long; stamens 9, 4-celled, 1.5-2 mm long. Filaments pubescent, inner 3 stamens with 2 glands at the base of the filaments.

Pistil glabrous, 2.5 mm long, style as long as ovary, receptacle deep, cup-shaped, appressed pubescent inside. Fruit initially enclosed in the receptacle, at maturity cupule cup-shaped, c. 2 cm in diameter, 1-1.5 cm high, often with 3 pronounced ribs on the outside, mature fruit ellipsoid, 2.5 × 1.7 cm.

REMARKS

Ocotea nervosa   is one of the three Ocotea species   with rather large leaves which have a raised reticulation on the upper leaf surface. Ocotea cryptocaryoides   has glabrous inflorescences and glabrous twigs (pubescent in O. nervosa   ), while O. cymosa   differs in having a finer reticulation on the leaves. The cupules of O. nervosa   have sometimes three ribs on the outside and resemble in this the 6-ribbed cupules of O. cryptocaryoides   .

The type of O. nervosa   consists of a twig with leaves and detached fruits. The leaves of the type are large and oblong and do not quite match the other collections placed here.