Taxon Details: Eschweilera potaroensis Sandwith
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Protologue of Eschweilera potaroensis.
Protologue of Eschweilera potaroensis.Family:
Lecythidaceae (Magnoliophyta)
Lecythidaceae (Magnoliophyta)
Scientific Name:
Eschweilera potaroensis Sandwith
Eschweilera potaroensis Sandwith
Primary Citation:
Kew Bull. 1955: 476. 1955
Kew Bull. 1955: 476. 1955
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Author: Nathan P. Smith & Scott A. Mori
Type: Type. Guyana. Mahdia River, Potaro River, 107 miles on Bartica-Potaro Rd., 16 Jan 1943 (fl), Fanshawe 1036 (Forest Dept. British Guiana 3772) (lectotype, K- sheet II, here designated; isolectotypes, K- sheet I, K-fruits, photo K fruits at NY, NY, U).
Description: Tree, to 50 m x 70-100 cm (R. C. Ek 1135), buttressed to 5 m. Leaves: petioles 7-14 mm long, canaliculate; blades widely oblong to oblong or widely elliptic to elliptic, 10-34 x 4.8-13 cm, glabrous, coriaceous, the base obtuse to rounded, the margins entire, the apex acuminate; secondary veins in 10-15 pairs. Inflorescences terminal or axillary, of simple racemes or once-branched paniculate arrangements of racemes, the principal rachis 6-19 cm long, glabrous, angled; pedicels 2-4 mm long below articulation, tapered into hypanthium above articulation. Flowers ca. 3-4 cm diam.; hypanthium sulcate, glabrous, dotted with minute, light colored lenticels, tapered to base; calyx-lobes 6, very widely ovate, 8-10 x 7-9 mm, imbricate at base, without mucilage bearing ducts, green flushed with red; petals 6, widely obovate, 26-38 x 17-22 mm, white; androecium zygomoprhic, the filaments in staminal ring ca. 1.5 mm long, clavate, the anthers 0.5-0.6 mm long, the hood 18 x 20 mm, forming complete coil, yellow or yellowish white, vestigial stamens present, staminodes absent; gynoecium with 4-locular ovary, the ovary with mucilage-bearing ducts as seen in cross section, summit umbonate, the style not differentiated from summit. Fruits depressed globose, turbinate, the calycine ring inserted near apex, the exocarp lenticellate. Seeds unknown.
Common names: Guyana: monkey pot.
Distribution: Eschweilera potaroensis is known only from the type tree and one other collection from central Guyana.
Ecology: Very little is known about the ecology of this species.
Phenology: Flowers have been collected in Jan.
Pollination: No observations recorded but this species is most likely pollinated by bees.
Dispersal: No observations recorded.
Predation: No observations recorded.
Field characters: The androecial hood with a coil in addition to a gynoecium that has mucilage ducts, a 4-locular ovary, and an undifferentiated style are diagnostic characters for E. potaroensis. Additional studies are needed to confirm the flower morphology of this species.
Taxonomic notes: In the protologue (Kew Bull. 1955: 476.), the author comments that E. potaroensis "seems to be a very distinct species of the Chytroma type. It is probably nearly related to E. congestiflora (Benoist) Eyma and E. simiorum (Benoist) Eyma." Chytroma Miers is presently treated as a synonym of Lecythis. Recent molecular studies, as well as flower and seed morphology, indicate that E. congestflora and E. simiorum would be better placed within Lecythis sensu lato (Mori in Mori & Prance, 1990). Both of these species lack a double or triple hood coil, and have 4-locular ovaries, mucilage ducts, long styles, and basal arils, which are characteristics of Lecythis not Eschweilera. The presence of a four-locular ovary and mucilage ducts in E. potaroensis suggest that this species might also belong to Lecythis. Further studies are needed to confirm this.
Conservation: IUCN Red List: Data Deficient ver 2.3 (World Conservation Monitoring Centre 1998. Eschweilera potaroensis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. www.iucnredlist.org. Downloaded on 28 February 2014.).
Uses: None known.
Etymology: The name of this species is a refrence to the Potaro River where the type was collected.
Source: This species page is based on Mori in Mori & Prance (1990).
Author: Nathan P. Smith & Scott A. Mori
Type: Type. Guyana. Mahdia River, Potaro River, 107 miles on Bartica-Potaro Rd., 16 Jan 1943 (fl), Fanshawe 1036 (Forest Dept. British Guiana 3772) (lectotype, K- sheet II, here designated; isolectotypes, K- sheet I, K-fruits, photo K fruits at NY, NY, U).
Description: Tree, to 50 m x 70-100 cm (R. C. Ek 1135), buttressed to 5 m. Leaves: petioles 7-14 mm long, canaliculate; blades widely oblong to oblong or widely elliptic to elliptic, 10-34 x 4.8-13 cm, glabrous, coriaceous, the base obtuse to rounded, the margins entire, the apex acuminate; secondary veins in 10-15 pairs. Inflorescences terminal or axillary, of simple racemes or once-branched paniculate arrangements of racemes, the principal rachis 6-19 cm long, glabrous, angled; pedicels 2-4 mm long below articulation, tapered into hypanthium above articulation. Flowers ca. 3-4 cm diam.; hypanthium sulcate, glabrous, dotted with minute, light colored lenticels, tapered to base; calyx-lobes 6, very widely ovate, 8-10 x 7-9 mm, imbricate at base, without mucilage bearing ducts, green flushed with red; petals 6, widely obovate, 26-38 x 17-22 mm, white; androecium zygomoprhic, the filaments in staminal ring ca. 1.5 mm long, clavate, the anthers 0.5-0.6 mm long, the hood 18 x 20 mm, forming complete coil, yellow or yellowish white, vestigial stamens present, staminodes absent; gynoecium with 4-locular ovary, the ovary with mucilage-bearing ducts as seen in cross section, summit umbonate, the style not differentiated from summit. Fruits depressed globose, turbinate, the calycine ring inserted near apex, the exocarp lenticellate. Seeds unknown.
Common names: Guyana: monkey pot.
Distribution: Eschweilera potaroensis is known only from the type tree and one other collection from central Guyana.
Ecology: Very little is known about the ecology of this species.
Phenology: Flowers have been collected in Jan.
Pollination: No observations recorded but this species is most likely pollinated by bees.
Dispersal: No observations recorded.
Predation: No observations recorded.
Field characters: The androecial hood with a coil in addition to a gynoecium that has mucilage ducts, a 4-locular ovary, and an undifferentiated style are diagnostic characters for E. potaroensis. Additional studies are needed to confirm the flower morphology of this species.
Taxonomic notes: In the protologue (Kew Bull. 1955: 476.), the author comments that E. potaroensis "seems to be a very distinct species of the Chytroma type. It is probably nearly related to E. congestiflora (Benoist) Eyma and E. simiorum (Benoist) Eyma." Chytroma Miers is presently treated as a synonym of Lecythis. Recent molecular studies, as well as flower and seed morphology, indicate that E. congestflora and E. simiorum would be better placed within Lecythis sensu lato (Mori in Mori & Prance, 1990). Both of these species lack a double or triple hood coil, and have 4-locular ovaries, mucilage ducts, long styles, and basal arils, which are characteristics of Lecythis not Eschweilera. The presence of a four-locular ovary and mucilage ducts in E. potaroensis suggest that this species might also belong to Lecythis. Further studies are needed to confirm this.
Conservation: IUCN Red List: Data Deficient ver 2.3 (World Conservation Monitoring Centre 1998. Eschweilera potaroensis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. www.iucnredlist.org. Downloaded on 28 February 2014.).
Uses: None known.
Etymology: The name of this species is a refrence to the Potaro River where the type was collected.
Source: This species page is based on Mori in Mori & Prance (1990).
Flora and Monograph Treatment(s):
Eschweilera potaroensis Sandwith: [Article] Mori, S. A. & Prance, Ghillean T. 1990. Lecythidaceae - Part II: The zygomorphic-flowered New World genera (Couroupita, Corythophora, Bertholletia, Couratari, Eschweilera, & Lecythis). With a study of secondary xylem of Neotropical Lecythidaceae by Carl de Zeeuw. Fl. Neotrop. Monogr. 21: 1-376.
Eschweilera potaroensis Sandwith: [Article] Mori, S. A. & Prance, Ghillean T. 1990. Lecythidaceae - Part II: The zygomorphic-flowered New World genera (Couroupita, Corythophora, Bertholletia, Couratari, Eschweilera, & Lecythis). With a study of secondary xylem of Neotropical Lecythidaceae by Carl de Zeeuw. Fl. Neotrop. Monogr. 21: 1-376.