Stahlia monosperma

Cóbana Negra

FWS Focus

Overview

Characteristics
Overview

Cóbana negra is an evergreen tree that is found in Puerto Rico and Dominican Republic, and was listed as threatened in 1990 under the Endangered Species Act. The name of the genus, Stahlia, honors the memory of Agustin Stahl, who is considered the first Puerto Rican naturalist. After DNA analysis in 2016 of the genus Libidibia, which is also from the Fabaceae family and shares many morphological similarities with the genus Stahlia, it was decided to change the genus from Stahlia to Libidibia. While the scientific community has accepted Libidibia as the appropriate genus for this species, we will continue using the listed taxonomic classification of Stahlia monosperma until a formal revision of the species’ genus can take place. In collaboration with several partners, we have been successfully implementing recovery actions for cóbana negra. Some of these recovery actions include propagating and planting the species within private lands and protected areas and enhancing habitat with native tree species, as well as surveying and monitoring the natural population and educating people about the importance of this species.

Scientific Name

Stahlia monosperma
Common Name
Cóbana negra
Cobana negra
FWS Category
Flowering Plants
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Characteristics

Characteristic category

Life Cycle

Characteristics
Life Span

Cóbana negra is an evergreen tree.

Life Cycle

Cóbana negra appears to lack a natural seed disperser, as most of the individuals are found growing under parental trees that rarely reach a reproductive size. This may possibly be due to inter-specific competition. Cóbana negra seeds propagated under nursery conditions, germinate faster when the exocarp, or fleshy outer cover, is removed and directly placed just slightly above the propagation medium on the germination bank. The germination time is five to seven days when planted right after collection, as compared to seven to 14 days, when the seeds are dried. Planted trees in the wild appear to tolerate a wide variety of soil and moisture conditions, although full sunlight seems to be necessary for vigorous growth of seedlings.

Reproduction

In Puerto Rico, cóbana negra flowers are produced between March and May, depending on rainfall. The common honeybee (Apis mellifera) has been observed around the flowers and might be a pollinator for cóbana negra. Fruits mature in summer and each fruit contains only one seed, hence the species name monosperm

Characteristic category

Physical Characteristics

Characteristics
Size & Shape

Cóbana negra trees can be easily identified by its pinnately, or leaf arrangement, compound leaves of six to 12 lance-shaped to ovate leaflets on red stalks. These have on their underside small glands that look like black dots.

Measurements
Height: Approximately 23 to 50 ft (7 to 15 m)
Diameter: 12 to 18 in (30 to 45 cm)
Fruit pod length: 1 to 2 in (2.5 to 5.1 cm)

Color & Pattern

The wood of cóbana negra is very hard, dense, durable and termite resistant. The heartwood is dark brown, whereas the sapwood is light brown in color. The flowers are pale yellow that develop into fruit that are a little fleshy, and when mature, turns bright red with a pleasant smell of ripe apple. This is similar to that of acerola (Malpighia glabra).

Weight
Sound
Characteristic category

Habitat

Characteristics
Habitat

Natural populations of cóbana negra are found along streams, on the edge of salt flats or shallow brackish lagoons in association with mangroves, which are flooded during the wet season. Although most natural populations are found adjacent to wetland areas, some are limited to drier, slightly elevated microsites that are not occupied by wetland vegetation.

Forest

A dense growth of trees and underbrush covering a large tract.

Coastal

The land near a shore.

Mountain

A landmass that projects conspicuously above its surroundings and is higher than a hill.

River or Stream

A natural body of running water.

Wetland

Areas such as marshes or swamps that are covered often intermittently with shallow water or have soil saturated with moisture.

Characteristic category

Behavior

Characteristics
Behavior
Characteristic category

Food

Characteristics
Food
Characteristic category

Similar Species

Characteristics
Similar Species

Geography

Characteristics
Range

Cóbana negra it is native to Puerto Rico and Dominican Republic. In Puerto Rico, natural populations are found mainly in the southwest and east sides of the Island, and on Vieques Island, which is east of mainland Puerto Rico. Currently, nine natural populations containing 1,118 cóbana negra individuals have been documented through this range, with only 14% of the individuals being reproductive adult trees. More than 2,500 cóbana negra individuals have been planted in both public and private lands that are managed for conservation through 22 municipalities of Puerto Rico, as well as in three areas in the Dominican Republic. We have no current information on status of those populations or the status of the species in the Dominican Republic.

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